Introduction
Conversion - English/Metric
Conversion - English/MetricEnglish Multiply/ Divide by Metric In order to calculate English measurement, divide by the number in the center column.
In order to calculate metric measurement, multiply by the number in the center column.Length in 25.4 mm ft 0.3048 m yd 0.9144 mi 1.609 km Area sq in 645.2 sq mm 6.45 sq cm sq ft 0.0929 sq m sq yd 0.8361 Volume cu in 16,387.0 cu mm 16.387 cu cm 0.0164 L qt 0.9464 gal 3.7854 cu yd 0.764 cu m Mass lb 0.4536 kg ton 907.18 0.907 tonne (t) Force kg F 9.807 newtons (N) oz F 0.2780 lb F 4.448 Acceleration ft/s2 0.3048 m/s2 in/s2 0.0254 Torque lb in 0.11298 N.m lb ft 1.3558 Power hp 0.745 kW Pressure (Stress) inches of H2O 0.2488 kPa lb/sq in 6.895 Energy (Work) Btu 1055.0 J (J= one Ws) lb ft 1.3558 kW hour 3,600,000.0 Light Foot Candle 10.764 lm/m2 Velocity mph 1.6093 km/h Temperature (°F - 32) 5/9 = °C °F = (9/5 °C + 32) Fuel Performance 235.215/mpg = 100 km/L
Equivalents - Decimal and Metric
Equivalents - Decimal and MetricFraction (in) Decimal (in) Metric (mm) 1/64 0.015625 0.39688 1/32 0.03125 0.79375 3/64 0.046875 1.19062 1/16 0.0625 1.5875 5/64 0.078125 1.98437 3/32 0.09375 2.38125 7/64 0.109375 2.77812 1/8 0.125 3.175 9/64 0.140625 3.57187 5/32 0.15625 3.96875 11/64 0.171875 4.36562 3/16 0.1875 4.7625 13/64 0.203125 5.15937 7/32 0.21875 5.55625 15/64 0.234375 5.95312 1/4 0.25 6.35 17/64 0.265625 6.74687 9/32 0.28125 7.14375 19/64 0.296875 7.54062 5/16 0.3125 7.9375 21/64 0.328125 8.33437 11/32 0.34375 8.73125 23/64 0.359375 9.12812 3/8 0.375 9.525 25/64 0.390625 9.92187 13/32 0.40625 10.31875 27/64 0.421875 10.71562 7/16 0.4375 11.1125 29/64 0.453125 11.50937 15/32 0.46875 11.90625 31/64 0.484375 12.30312 1/2 0.5 12.7 33/64 0.515625 13.09687 17/32 0.53125 13.49375 35/64 0.546875 13.89062 9/16 0.5625 14.2875 37/64 0.578125 14.68437 19/32 0.59375 15.08125 39/64 0.609375 15.47812 5/8 0.625 15.875 41/64 0.640625 16.27187 21/32 0.65625 16.66875 43/64 0.671875 17.06562 11/16 0.6875 17.4625 45/64 0.703125 17.85937 23/32 0.71875 18.25625 47/64 0.734375 18.65312 3/4 0.75 19.05 49/64 0.765625 19.44687 25/32 0.78125 19.84375 51/64 0.796875 20.24062 13/16 0.8125 20.6375 53/64 0.828125 21.03437 27/32 0.84375 21.43125 55/64 0.859375 21.82812 7/8 0.875 22.225 57/64 0.890625 22.62187 29/32 0.90625 23.01875 59/64 0.921875 23.41562 15/16 0.9375 23.8125 61/64 0.953125 24.20937 31/32 0.96875 24.60625 63/64 0.984375 25.00312 1 1.0 25.4
Arrows and Symbols
This service manual uses various symbols in order to describe different service operations.
Fig. 1: Identifying Symbols Used To Describe Different Service Operations
Courtesy of GENERAL MOTORS CORP.
Callout Component Name 1 Front of Vehicle 2 View Detail 2 View Detail 3 Ambient Air Mixed With Another Gas or Indicate Temperature Change 4 Motion or Direction 5 View Angle 6 Dimension (1:2) 7 Ambient/Clean Air Flow or Cool Air Flow 8 Lubrication Point - Oil or Fluid 9 Task Related 10 Sectioning (1:3) 11 Gas Other Than Ambient Air or Hot Air Flow 12 Lubrication Point - Grease or Jelly 13 Multidirectional Arrow
Special Tools Ordering Information
The special service tools shown in this service manual that have product numbers beginning with J, SA or BT are available for worldwide distribution from:
OE Tool and Equipment Group
Kent-Moore
28635 Mound Road
Warren
MI, U.S.A
48092-3499
Phone: 1-800-345-2233 or 586-574-2332
Monday through Friday
8:00 am-7:00 pm Eastern Standard Time
Fax: 1-800-578-7375 or 586-578-7321
The TECH 2 scan tool and accessories can be purchased through:
Dealer Equipment and Services
5775 Enterprise Dr.
Warren
MI, U.S.A
48092-3463
Phone: 1-800-GM-TOOLS or 586-574-2332
Monday through Friday
8:00 am-6:00 pm EST
Fax: 1-586-578-7205
Diagnostic Work Sheets
The GM Diagnostic Worksheet has been designed to improve communications between the service customer and the technician. The diagnostic worksheet can provide the technician with more information than the conventional repair order, since it is filled out by the service customer. Dealers in the US may contact Dealer Support Materials at 1-800-235-8521 and request Form Number DWS-01 to obtain these worksheets at no cost. Dealers may also access the DWD Store in Dealerworld and search for form DWS-01 or select Service Forms under Other Links and then select Diagnostic Worksheet (under Bulletin Information on use of Diagnostic Worksheet). Please limit your requests to a reasonable quantity.
Training
Dealers
All U.S. Dealers participating in the GM Common Training Program can enroll through the GM Common Training System Website at https://www.gmcommontraining.com. Within the website, there are individual training paths that are designed to assist in planning the training needs for each individual. Technicians should advise their Service Manager of their training needs including course names and course numbers. Dealers who have questions about GM Common Training should contact the GM Common Training help desk at 1-888-748-2686. The help desk is available Monday through Friday, 8:00 am-8:00pm Eastern Standard Time, excluding holidays. For GM Access support, contact the GM Access Help Desk at 1-888-337-1010.
Fleets
GM Fleet customers with GM Warranty In-Shop agreements are able to participate in service technical training through GM Common Training/GM Service Technical College (STC).
Assistance for all GM fleet customers using GM STC products and services is provided on the Internet via www.gmcommontraining.com using the "Contact Us" button on the site and/or the GM Common Training Help Desk at 1-888-748-2687. To order GM STC Training Materials, please contact the GM Training Materials Headquarters at 1-800-393-4831.
Most GM STC course materials have associated charges.
To purchase authentic GM STC Training Materials, contact the GM Training Materials Headquarters at 1-800-393-4831.
Non-GM Dealer Technicians
Technicians training for non-GM dealers is available through ACDelco. This training is for ACDelco customers employed in the automotive or truck service industry.
ACDelco courses are available at all approved GM Training Centers. Availability and schedules can be obtained by calling 1-800-825-5886 or contact us via the web at www.acdelcotechconnect.com and select the training button. Clinics are also offered through ACDelco Warehouse Distributors. Contract your dealer directly for more information.
Vehicle, Engine and Transmission ID and VIN Location, Derivative and Usage
Fig. 2: Locating Vehicle Identification Number (VIN) Plate
Courtesy of GENERAL MOTORS CORP.
The vehicle identification number (VIN) plate is the legal identifier of the vehicle. The VIN plate is located on the upper LH corner of the instrument panel. The VIN number can be seen through the windshield from the outside of the vehicle:
Vehicle Identification Number (VIN) SystemPosition Definition Character Description 1 Country of Origin 1
2United States
Canada2 Manufacturer G General Motors 3 Make B
C
D
TChevrolet Incomplete
Chevrolet Truck
GMC Incomplete
GMC Truck4 GVWR/Brake System E
F
G
H
J6001-7000/Hydraulic
7001-8000/Hydraulic
8001-9000/Hydraulic
9001-10000/Hydraulic
10001-14000/Hydraulic5 Truck Line/Chassis Type C
K4x2
4x46 Series 1
2
6Half Ton Nominal
3/4 Ton Nominal
1/2 Ton Luxury7 Body Type 3
4
9Four-Door Crew Cab or Utility
Two-Door Cab
Extended Cab8 Engine Type X
V
Z
T
U
N
G
24.3L V6 MFI (LU3)
4.8L V8 MFI (LR4)
5.3L V8 MFI (L59)
5.3L V8 MFI (LM7)
6.0L V8 MFI (LQ4)
6.0L V8 MFI (LQ9)
8.1L V8 MFI (L18)
6.6L V8 DSL (LLY)9 Check Digit - Check Digit 10 Model Year 5 2005 11 Plant Location 1
E
F
Z
GOshawa, Ontario
Pontiac, Michigan
Flint, Michigan
Fort Wayne, Indiana
Silao12-17 Plant Sequence Number - Plant Sequence Number
4.3L (LU3) Engine ID and VIN Derivative Location
Refer to Engine Identification in Engine Mechanical - 4.3L.
4.8L (LR4), 5.3L (L59, LM7) 6.0L (LQ4, LQ9) Engine ID and VIN Derivative Location
Refer to Engine Identification in Engine Mechanical - 4.8L, 5.3L, 6.0L.
6.6L (LLY) Engine ID and VIN Derivative Location
Refer to Engine Identification in Engine Mechanical - 6.6L.
8.1L (L18) Engine ID and VIN Derivative Location
Refer to Engine Identification in Engine Mechanical - 8.1L.
4L60-E/4L65-E Transmission ID and VIN Derivative Location
Refer to Transmission Identification Information in Automatic Transaxle - 4L60-E/4L65-E.
4L80-E/4L85-E Transmission ID and VIN Derivative Location
Refer to Transmission Identification Information in Automatic Transaxle - 4L80-E/4L85-E.
Allison Transmission ID and VIN Derivative Location
Refer to Transmission Identification Information in Automatic Transaxle - Allison.
Label - Vehicle Certification, Tire Place Card, Anti-Theft and Service Parts ID
Fig. 3: Vehicle Certification, Tire Place Card, Anti-Theft & Service Parts ID Labels
Courtesy of GENERAL MOTORS CORP.
Label - Vehicle Certification, Tire Place Card, Anti-Theft and Service Parts IDCallouts Description Vehicle Certification Label
The vehicle certification label is located on the driver door and displays the following assessments:1 Name of Manufacturer 2 Gross Vehicle Weight Rating 3 Gross Axle Weight Rating (Front, Rear) 4 Canadian Safety Mark (w/RPO Z49) 5 Certification Statement 6 Vehicle Class Type (Pass Car, etc.) 7 Vehicle Identification Number 8 Date of Manufacture (Mo/Yr) Tire Placard
The tire placard label is located on the driver door and displays the following assessments:9 Specified Occupant Seating Positions 10 Maximum Vehicle Capacity Weight 11 Original Equipment Tire Size 12 Tire Pressure, Front, Rear, and Spare (Cold) Service Parts ID Label
The vehicle service parts identification label is located in the instrument panel (I/P) compartment. The label is use to help identify the vehicle original parts and options.13 Vehicle Identification Number 14 Engineering Model Number (Vehicle Division, Line and Body Style) 15 Interior Trim Level and Decor 16 Exterior (Paint Color) WA Number 17 Paint Technology 18 Special Order Paint Colors and Numbers 19 Vehicle Option Content Anti-Theft Label 20 The Federal law requires that General Motors label certain body parts on this vehicle with the VIN. The purpose of the law is to reduce the number of motor vehicle thefts by helping in the tracing and recovery of parts from stolen vehicles.
Labels are permanently affixed to an interior surface of the part. The label on the replacement part contains the letter R, the manufacturer's logo, and the DOT symbol.
The anti-theft label must be covered before any painting, and rustproofing procedures, and uncovered after the procedures. Failure to follow the precautionary steps may result in liability for violation of the Federal Vehicle Theft Prevention Standard and possible suspicion to the owner that the part was stolen.
RPO Code List
RPO TableRPO Description The production/process codes provide the description of the Regular Production Options (RPOs). The RPO list is printed on the Service Parts Identification Label. AE7 Seat Front Split, Driver, Passenger AG1 Adjuster Front Seat Power, Multi-Directional, Driver AG2 Adjuster Passenger Seat Power, Multi-Directional AJ1 Windows Deep Tint, All Except W/S and DRS AL0 Sensor Indicator Inflatable Restraint, Front Passenger/Child Presence Detector AM7 Rear Seat Folding AN3 Seat Front, Individual, Non-Bucket AU0 Lock Control, Remote Entry AU3 Lock Control Side Door, Electric A04 Windshield Tinted, Less Upper Shadeband A31 Window Power Operated, All Doors A95 Seat Front Bucket, High Back, Driver and Passenger Recliner BAG Parts Package Export BA5 Ornamentation Exterior, Custom BD2 Ornamentation Exterior - Delete BG9 Covering, Floor, Rubber BPH Appearance Package Chevrolet - Off Road BS1 Insulation Acoustical Package BVE Steps, Runningboard, Side BVF Steps, Runningboard, Side, Color Keyed BVS Steps, Runningboard, Side, Color BW2 Molding, B/S Deluxe B30 Floor Covering, Carpet B32 Covering Front Floor Mats, Auxiliary B33 Covering Rear Floor Mats, Auxiliary B34 Covering Front Floor Mats, Carpeted Insert B4L Label Price, Refer Geographic Chart B4U Performance Package, Sport B58 Covering Floor Mat, Front and Rear, Carpeted Insert B71 Molding, Wheel Opening, Colored B81 Molding Body/Side - Delete B82 Ornamentation Exterior, Emblem - Delete B85 Molding, Body/Side, Exterior, Bright CJ2 HVAC System, Air Conditioner Front, Automatic Temperature Control, Auxiliary Temperature Control CJ3 HVAC System, Air Conditioner Front, Manual Temperature Control, Auxiliary Temperature Control CKD Vehicle Completely Knocked Down CMD Plant Code, Flint, MI, USA - Truck C3J GVW Rating 6,700 lbs C4M GVW Rating 9,900 lbs C42 HVAC System Heater, Outside Air, Deluxe C49 Defogger Rear Window, Electric C5F GVW Rating 8,500 lbs C5H GVW Rating 6,900 lbs C5M GVW Rating 6,100 lbs C5S GVW Rating 6,600 lbs C5U GVW Rating 6,800 lbs C5Z GVW Rating 7,200 lbs C6P GVW Rating 8,600 lbs (3900 kg) C6W GVW Rating 9,200 lbs C7H GVW Rating 6,400 lbs (2900 kg) C7L GVW Rating 12,000 lbs C7W GVW Rating 11,400 lbs C86 Lamp, Manual Transmission, Shift Indicator, Tell-tale Suppression DE2 Mirror, Outside Left and Right, Manual Control, Folding, Color DF2 Mirror, Outside Left and Right, Wide Load, Folding, Stainless Steel DF5 Mirror, Inside Rearview, Light Sensitive, Compass, Outside Temperature Display DG5 Mirror, Outside Left and Right, Wide Load, Large DH6 Mirror, Inside Front Van, Left and Right, Sunshade, Illumination DK7 Console Roof Interior, Custom DL3 Mirror, Outside Left and Right, Remote Control, Electric, Heated, Power Folding, Turn Signal Indicator, Light Sensitive, Color DL8 Mirror, Outside Left and Right, Remote Control, Electric, Heated DNR Equipment Dealer Installed DPF Mirror, Outside Left and Right, Wide Load, Remote Control, Electric, Heated DT4 Ashtray Cigarette Lighter D07 Console, Front Compartment, Floor, Custom D44 Mirror, Outside, Color EN6 Cover, Rear Compartment Hard Folding, Rear Compartment, Cargo ESC Equipment, Individual Front seats with Front Floor Compartment Console Provisions EVA Test DVT, EVAP Emission Requirement E37 Pickup Box Inner DK Composite E62 Body Equipment Step Side, Pick-up Box E63 Body Equipment Fleetside, Pick-up Box E95 Cover Tonneau, Rear Compartment FF4 Left Arm Torsion Bar Spring Adjusted (C) FF5 Right Arm Torsion Bar Spring Adjusted (D) FF6 Left Arm Torsion Bar Spring Adjusted (E) FF7 Right Arm Torsion Bar Spring Adjusted (F) FF8 Left Arm Torsion Bar Spring Adjusted (G) FF9 Right Arm Torsion Bar Spring Adjusted (H) FK2 Left Arm Torsion Bar Spring Adjusted (A) FK3 Right Arm Torsion Bar Spring Adjusted (B) FNF Floor Power Take Off (PTO) Front FT2 Left Arm Torsion Bar Spring Adjusted (FT2) FT3 Right Arm Torsion Bar Spring Adjusted (FT3) FWI Plant Code Fort Wayne, IN, USA FW1 Manual Electric Control, Ride and Handling F0F Fleet Incentive Tourism Industry Inc. DBA Budget Sales & Leasing F60 Spring Front Heavy Duty GMC Plant Code Pontiac, MI, USA GTY Axle Wide Track GT4 Axle Rear 3.73 Ratio GT5 Axle Rear 4.10 Ratio (DUP With GT8) GU4 Axle Rear 3.08 Ratio GU6 Axle Rear 3.42 Ratio G80 Axle Positraction Limited Slip G86 Axle Limited-Slip HOT Appearance Package GMC "Hot Truck" HP2 Hybrid Propulsion Electric, Parallel, 14V/42V with 120V-2400W Outlets, Idle Engine Off HVY Identification 2-inch Body Raise, HD Model JC3 Brake Vac Power, Disc/Disc, 6,400 lb JC4 Brake Vac Power, Disc/Disc, 7,200 lb JH1 Brake Hydraulic Power, Disc/Disc, 6,400 lbs JH6 Brake Hydraulic Power, 4-Wheel Disc, 9,900 lbs JH7 Brake Hydraulic Power, 4-Wheel Disc, 12,300 lbs (Dup with JH9) JL4 Control Active Brake JVA Brake System, Antilock Brake - Delete KC4 Engine Oil Cooling System KG3 Generator 145 Amp KL5 Modification Engine, Natural Gas KL6 Provisions, Natural Gas KL8 Conversion Natural Gas (CNG Gas) KNP Cooling System Transmission, HD KUP Throttle Control Electronic K05 Heater Engine Block K34 Cruise Control, Automatic, Electronic K47 Air Cleaner High Capacity K53 Fuel Sender Assembly, Robust Fuel System K65 Generator, 105 Amp, Dual K68 Generator, 105 Amp LLY Engine, Diesel, 8 Cylinder, 6.6L, DI, V8, Turbo-High, Duramax LM7 Engine Gas, 8 Cylinder, 5.3L, MFI, Iron, GM LQ4 Engine Gas, 8 Cylinder, 6.0L, MFI, Iron, GM LQ9 Engine Gas, 8 Cylinder, 6.0L, MFI, Iron, GM, Ho LR4 Engine Gas, 8 Cylinder, 4.8L MFI, Iron, GM LU3 Engine Gas, 6 Cylinder, 4.3L, MFI, V6, 90 DEG L18 Engine Gas, 8 Cylinder, 8.1L, MFI L31 Engine Gas, 8 Cylinder, 5.7L, CPI L59 Engine Flexible Fuel - Gas/ALC, 8 Cylinder, 5.3L, MFI, V8, GM MEX Plant Code Toluca, Mexico MG5 Transmission Manual 5-Speed, Getrag, 84mm, 4.00 1st, O/D ML6 Transmission Manual 6-Speed ZF, 105mm, 5.79 1st, 0.72 6th, O/D MTF Provisions - Fire Extinguisher Mounting MT1 Transmission Auto 4-Speed HMD 4L80-E MW3 Transmission Manual, 5-Speed, NVG, 109mm, 5.61 1st, O/D M1F Power Take Off Rear PTO M30 Transmission Auto 4-Speed, HMD, 4L60-E, Electronic M32 Transmission Auto 4-Speed, HMD, 4L60-E, Electronic, HD M33 Transmission Auto 4-Speed, HMD, 4L60-E, Electronic, Hybrid M74 Transmission Auto 5-Speed, Allison, LCT 1000, 3.10 1st, 1.00 4th, 0.71 5th, O/D, Conversion Clutch NA1 Emission System GVW less than 8,500 lb NA4 Emission System GVW greater than 8,500 lb NC1 Emission System California, LEV NC8 Emission System California, ULEV NF2 Emission System Federal, Tier 1 NF4 Emission System Clean Fuel, Fleet NF9 Emission System General Unleaded NPL Plate Name - Delete NP1 Transfer Case, Electric Shift Control, 2 Speed NP2 Transfer Case, Manual Shift Control, 2 Speed NP3 Transfer Case, All-Wheel Drive NP5 Steering Wheel, Leather Wrapped NP8 Transfer Case Active, 2 Speed Push Button Control NQZ Fuel Tank Auxiliary, Rear Mounted, 18 gallon - Delete NR4 Transfer Case Four Wheel Drive (4WD), Open Differential, 2-Speed NT8 Emission System Federal, Tier 2 A NT9 Emission System Federal, Tier 2 Phase-out NU4 Emission System California Level 2 Plus NW7 Traction Control, Powertrain Management Only NYS Steering 4-Wheel NZZ Sales Package, Skid Plate Off-Road Spot N05 Lock Control Fuel Filler Cap N12 Rear Exit Exhaust System N93 Wheel - Aluminum - Chrome - 17 X 7.5 OSG Plant Code Oshawa, Ont, Canada (TRK) PF4 Wheel - Aluminum - 16 X 7.0 PF9 Wheel - Aluminum Cast - 16 X 7.0 PPB Equipment PUBX Extender PRO Appearance Package Sierra Professional PTO Provisions, Power Take Off (PTO) Controls PUB Cap PUBX Bed Ral PY0 Wheel - Aluminum - 16 X 6.5 PY2 Wheel - Chrome Appearance - 16 X 6.5 P03 Wheel Cover, Var 3 P06 Trim Discs Wheel P25 Wheel 17 x 7.5, Aluminum, 5 Spoke Premium P27 Wheel 17 x 7.5, Aluminum, 6 Spoke Premium P30 Wheel 20x8.5, Aluminum, Sport P96 Equipment, Mexican Modified, Mandatory Base Equipment QAN Tire All P265/70R 17 - 113S BW R/PE ST TL AL2 QBX Tire All LT245/75R16/C WOL R/PE ST TL OOR QCC Tire ALL P255/70R16 BW R/PE ST TL ALS QCJ Tire All P255/70R16 WOL R/PE ST TL ALS QCP Tire All P255/70R16 - 109H BW R/PE ST TL ALS QC1 Wheel 16 x 7, Steel QC4 Wheel 16 x 7, Aluminum, Custom QER Tire All LT265/75R16/E BW R/PE ST TL OOR (123/120Q) QE4 Wheel Spare 16 x 6.5, Aluminum QGC Tire All P265/75R16 - 114S BW R/PE ST TL AT QGD Tire All P265/75R16 - 114S WOL R/PE ST TL AT QHS Tire All P265/75R16 - 114H BW R/PE ST TL AT "A" TEMP Rating QIW Tire All LT245/75R16/E BW R/PE ST TL OOR 120Q QIZ Tire All LT245/75R16/E BW R/PE ST TL ALS 12OQ QJM Tire All P265/70R17 - 113S WOL R/PE ST TL OOR QJP Tire All P265/70R17 - 113S BW R/PE ST TL OOR QLP Tire All LT245/75R16/E BW R/PE ST TL ALS 120/116S QNF Tire All P235/75R16 - 106S BW R/PE ST TL ALS QNG Tire All P235/75R16 - 106S WOL R/PE ST TL ALS QNK Tire All P245/75R16 - 109S BW R/PE ST TL ALS QNL Tire All P245/75R16 - 109S WOL R/PE ST TL ALS QSS Tire All P275/55R20 - 111S BW TL ST AL2 QVL Tire All P265/70R17 - 113S BW R/PE ST TL ALS QVM Tire All P265/70R17 - 113S WOL R/PE ST TL ALS Q4B GVW Rating 6,200 lbs R4Y Tire Brand All Goodyear R5C Tire Brand All Bridgestone SAF Lock Spare Tire, Hoist Shaft SRW Chassis 9,900 lbs GVW, Single Rear Wheel Ride and Handling SSL Ornamentation, Exterior, Nameplate, GMC Sierra SL TL1 Grille Special TP2 Battery Auxiliary TQ3 Battery 770 CCA (Dual) TRB Grille Radiator, Body Color TRW Provisions Lamp, Roof Mounted TR3 Grille Radiator, Body Color, w/Chrome Emblem TS9 Lamp Stop, High Level - Delete TZ0 Transmission Manual 5-Speed, Tremac, 85mm, 3.82 1st, 0.83 5th T07 Generator - Delete T2H Exterior Ornamentation, Export Unique Requirements T62 Lamp System Daytime Running - Delete T64 Battery - Delete T7L Equipment: Miscellaneous Equipment for Central America - GMM Controlled T78 Headlamps Control - Delete T8Z Emission System: Low Emissions Vehicle - Mexico T96 Fog Lamps, Front UB0 Radio AM/FM Stereo, Seek/Scan, CD, Auto Tone, Data System Clock, ETR UB1 Radio AM/FM Stereo, Seek/Scan, Auto Reverse Music Search Cassette, CD, Auto Tone, Data System Clock, ETR UC2 Speedometer Instrument, Kilo and Miles, Kilo Odometer, Positive Bias UC6 Radio AM/FM Stereo, Seek/Scan, RDS, Multiple Compact Disc, Auto Tone Control, Clock, ETR UD4 Alarm Vehicle Speed, 120 km/h UE1 Communication System Vehicle, GPS. 1 UG1 Universal Garage Door Opener UK3 Accessory Steering Wheel Control UK6 Radio Control Rear Seat and Earphone Jacks UL4 Frequencies, South American UL5 Radio - Delete UL8 Frequencies, Saudi Arabian UM7 Radio AM/FM Stereo, Seek/Scan, Clock, ETR UQ3 Speaker System, Performance Enhanced Audio UQ5 Speaker System 4, Dual Front Door Mounted, Dual Extended Range Quarter Mounted UQ7 Speaker System Premium Performance, Enhanced Audio, Bose® UQ9 Speaker System - Delete UY2 Wiring Provisions for Camper/5th Wheel Trailer U01 Lamp Five, Roof Marker, Truck U1S Player Multiple Compace Disc U19 Speedometer Instrument, Kilo and Miles, Kilo Odometer U2K Digital Audio System S-Band U42 Entertainment Package Rear Seat VBX Language Label Arabic VB3 Bumper Rear Step, Chrome, Impact Strip VC0 Label, Noise Control Information VC4 Label Price/Fuel Economy, Puerto Rico and Virgin Islands VC5 Label Shipping, Except US, US Possessions, or Japan VC7 Label Price/Fuel Economy, Guam VFF Video Format Region 1, NTSC VFJ Video Format Region w PAL VFM Video Format Region 4, NTSC VFP Video Format Region 5, PAL VF7 Bumper Rear Step - Delete VGC Protector Film, Paint Etch Preventive VG3 Bumper Front Impact Strip VG8 Vehicle Label, Notice to Buyer VK3 License Plate, Front Mounting Package VPH Vehicle Preparation Overseas Delivery VP6 Noise Control VR4 Trailer Hitch Weight Distributing Platform VR6 Hook Tie-Down Shipping VSP Box Dual Rear Wheels VT4 Bumper Front Color Keyed VT5 Bumper Rear Color Keyed VXS Vehicle Complete VXT Vehicle Incomplete VYU Provisions, Snow Plow Preparation VZ2 Calibration Speedometer A VZ3 Label Mercury Disposal Notification V10 Cold Weather Options Provision V22 Grille Radiator, Chrome V43 Bumper, Rear Step, Color V60 Vehicle Statement Gulf States Organization, Incomplete Vehicle V73 Vehicle Statement, USA/ Canada V76 Front Towing Hook V78 Vehicle Statement - Delete V87 Vehicle Statement Gulf States Organization V98 Factory Delivery Processing W86 Equipment: Miscellaneous Equipment for Venezuela (GMV Controlled) W99 Equipment: Miscellaneous Equipment for Venezuela (GM Platform Controlled) XAN Tire Front P265/70R17 - 113S BW R/PE ST TL AL2 XBX Tire Front LT245/75R16/C WOL R/PE ST TL OOR XCC Tire Front P255/70R16 BW R/PE ST TL ALS XCJ Tire Front P255/70R16 WOL R/PE ST TL ALS XCP Tire Front P255/70R16 - 109H BW R/PE ST TL ALS XEC Tire Front LT215/85R16/E BW R/ST TL Highway XEF Tire Front LT215/85R16/E BW R/PE ST TL OOR XER Tire Front LT265/75R16/E BW R/PE ST TL OOR (123/120Q) XGC Tire Front P265/75R16 - 114S BW R/PE ST TL AT XGD Tire Front P265/75R16-114S WOL R/PE ST TL AT XGK Tire Front LT245/75R16/E BW R/PE ST TL OOR 120Q XHH Tire Front LT245/75R16/E BW R/PE ST TL LS 120QT XHS Tire Front P265/75R16-114H BW R/PE ST TL AT "A" Temp Rating XJM Tire Front P265/70R17-113S WOL R/PE ST TL OOR XJP Tire Front P265/70R17-113S BP R/PE ST TL OOR XLP Tire Front LT245/75R16/E BW R/PE ST TL ALS 120/116S XNF Tire Front P235/75R16-106S BW R/PE ST TL ALS XNG Tire Front P235/75R16-106S WOL R/PE ST TL ALS XNK Tire Front P245/75R16-109S BW R/PE ST TL ALS XNL Tire Front P245/75R16-109S WOL R/PE ST TL ALS XSS Tire Front P275/55R20-111S BW TL ST AL2 XVL Tire Front P265/70R17-113S BW R/PE ST TL ALS XVM Tire Front P265/70R17-113S WOL R/PE ST TL ALS XYK Tire Front LT215/85R16/D BL R/PE ST TL HWY XYL Tire Front LT215/85R16/D BL R/PE ST TL OOR X52 Miscellaneous Equipment for Guam, Puerto Rico/US Virgin Islands X88 Conversion Name Plate Chevrolet YAN Tire Rear P265/70R17 - 113S BW R/PE ST TL AL2 YBX Tire Rear LT245/75R16/C WOL R/PE ST TL OOR YB3 Plate Clutch Driven, Part of English - Delete YCC Tire Rear P255/70R16 BW R/PE ST TL ALS YCJ Tire Rear P255/70R16 WOL R/PE ST TL ALS YCP Tire Rear P255/70R16 - 109H BW R/PE ST TL ALS YEC Tire Rear LT215/85R16/E BW R/PE ST TL HWY YEF Tire Rear LT215/85R16/E BW R/PE ST TL OOR YER Tire Rear LT265/75R16/E BW R/PE ST TL OOR (123/120Q) YE9 Convenience Package Comfort and Decor Level #3 YF2 Sales Package Ambulance Upfitter YGC Tire Rear P265/75R16-114S BW R/PE ST TL AT YGD Tire Rear P265/75R16-114S WOL R/PE ST TL AT YGK Tire Rear LT245/75R16/E BW R/PE ST TL OOR 120Q YHH Tire Rear LT245/75R16/E BW R/PE ST TL ALS 120Q YHS Tire Rear P265/75R16-114H BW R/PE ST TL AT "A" Temp YJM Tire Rear P265/70R17-113S WOL R/PE ST TL OOR YJP Tire Rear P265/70R17-113S BW R/PE ST TL OOR YLP Tire Rear LT245/75R16/E BW R/PE ST TL ALS 120Q/116S YNF Tire Rear P235/75R16-106S BW R/PE ST TL ALS YNG Tire Rear P235/75R16-106S WOL R/PE ST TL ALS YNK Tire Rear P245/75R16-109S BW R/PE ST TL ALS YNL Tire Rear P245/75R16-109S WOL R/PE ST TL ALS YSS Tire Rear P275/55R20-111S BW TL ST AL2 YVL Tire Rear P265/70R17-113S BW R/PE ST TL ALS YVM Tire Rear P265/70R17-113S WOL R/PE ST TL ALS YYK Tire Rear LT215/85R16/D BL R/PE ST TL HWY YYL Tire Rear LT215/85R16/D BL R/PE ST TL OOR Y91 Merchandised Package Luxury Edition ZBX Tire Spare LT245/75R16/C WOL R/PE ST TL OOR ZCC Tire Spare P255/70R16 BW R/PE ST TL ALS ZCJ Tire Spare P255/70R16 WOL R/PE ST TL ALS ZCP Tire Spare P255/70R16-109H BW R/PE ST TL ALS ZEC Tire Spare LT215/85R16/E BW R/PE ST TL HWY ZEF Tire Spare LT215/85R16/E BW R/PE ST TL OOR ZER Tire Spare LT265/75R16/E BW R/PE ST TL OOR (123/120Q) ZGC Tire Spare P265/75R16-114S BW R/PE ST TL AT ZGD Tire Spare P265/75R16-114S WOL R/PE ST TL AT ZGK Tire Spare LT245/75R16/E BW R/PE ST TL OOR 120Q ZHH Tire Spare LT245/75R16/E BW R/PE ST TL ALS 120Q ZHS Tire Spare P265/75R16-114H BW R/PE ST TL AT "A" Temp Rating ZLP Tire Spare LT245/75R16/E BW R/PE ST TL ALS 120/116S ZNF Tire Spare P235/75R16-106S BW R/PE ST TL ALS ZNG Tire Spare P235/75R16-106S WOL R/PE ST TL ALS ZNK Tire Spare P245/75R16-109S BW R/PE ST TL ALS ZNL Tire Spare P245/75R16-109S WOL R/PE ST TL ALS ZW9 Body Equipment, Base Body or Chassis ZX3 Chassis Package Manual Select Damping ZYK Tire Spare LT215/85R16/D BL R/PE ST TL HWY ZYL Tire Spare LT215/85R16/D BL R/PE ST TL OOR ZY1 Color Combination, Solid ZY2 Color Combination, 2-Tone Z49 Export Canadian Modification Mandatory Base Equipment Z5X Mirror Provisions Arabic Language Z60 Chassis Package High Performance Z71 Chassis Package "Off Road" Z75 Conversion Name Plate Cadillac Z82 Trailer Provisions Special Equipment, H. D. Z83 Chassis Package Solid Smooth Ride Z85 Chassis Package Increased Capacity Z88 Conversion Name Plate GMC 01L Secondary Color Exterior, Special (96) 01U Primary Color Exterior, Special (02)
Fasteners
Metric Fasteners
This vehicle provides fastener dimensions using the metric system. Most metric fasteners are approximate in diameter to equivalent English fasteners. Make replacements using fasteners of the same nominal diameter, thread pitch, and strength.
A number marking identifies the OE metric fasteners except cross-recess head screws. The number also indicates the strength of the fastener material. A Posidrive® or Type 1A cross-recess identifies a metric cross-recess screw. For best results, use a Type 1A cross-recess screwdriver, or equivalent, in Posidrive® recess head screws.
GM Engineering Standards and North American Industries have adopted a portion of the ISO-defined standard metric fastener sizes. The purpose was to reduce the number of fastener sizes used while retaining the best thread qualities in each thread size. For example, the metric M6.0 X 1 screw, with nearly the same diameter and 25.4 threads per inch replaced the English 1/4-20 and 1/4-28 screws. The thread pitch is midway between the English coarse and fine thread pitches.
Fig. 4: Identifying Fastener Strength Marks
Courtesy of GENERAL MOTORS CORP.
Callout Component Name 1 English Bolt, Grade 2 (Strength Class) 2 English Bolt, Grade 5 (Strength Class) 3 English Bolt, Grade 7 (Strength Class) 4 English Bolt, Grade 8 (Strength Class) 5 Metric Nut, Strength Class 9 6 Metric Bolts, Strength Class Increases as Numbers Increase
The most commonly used metric fastener strength property classes are 9.8 and 10.9. The class identification is embossed on the head of each bolt. The English, inch strength classes range from grade 2 to grade 8. Radial lines are embossed on the head of each bolt in order to identify the strength class. The number of lines on the head of the bolt is 2 lines less than the actual grade. For example, a grade 8 bolt will have 6 radial lines on the bolt head. Some metric nuts are marked with a single digit strength identification number on the nut face.
The correct fasteners are available through GM SPO. Many metric fasteners available in the aftermarket parts channels are designed to metric standards of countries other than the United States, and may exhibit the following:
- Lower strength
- No numbered head marking system
- Wrong thread pitch
The metric fasteners on GM products are designed to new, international standards. The following are the common sizes and pitches, except for special applications:
- M6.0 X 1
- M8 X 1.25
- M10 X 1.5
- M12 X 1.75
- M14 X 2.00
- M16 X 2.00
Prevailing Torque Fasteners
Prevailing torque fasteners create a thread interface between the fastener and the fastener counterpart in order to prevent the fastener from loosening.
All Metal Prevailing Torque Fasteners
These fasteners accomplish the thread interface by a designed distortion or deformation in the fastener.
Nylon Interface Prevailing Torque Fasteners
These fasteners accomplish the thread interface by the presence of a nylon material on the fastener threads.
Adhesive Coated Fasteners
These fasteners accomplish the thread interface by the presence of a thread-locking compound on the fastener threads. Refer to the appropriate repair procedure in order to determine if the fastener may be reused and the applicable thread-locking compound to apply to the fastener.
Fig. 5: Identifying Adhesive Coated Fasteners
Courtesy of GENERAL MOTORS CORP.
Callout Component Name 1 Prevailing Torque Nut, Center Lock Type 2 Prevailing Torque Nut, Top Lock Type 3 Prevailing Torque Nut, Nylon Patch Type 4 Prevailing Torque Nut, Nylon Washer Insert Type 5 Prevailing Torque Nut, Nylon Insert Type 6 Prevailing Torque Bolt, Dry Adhesive Coating Type 7 Prevailing Torque Bolt, Thread Profile Deformed Type 8 Prevailing Torque Bolt, Nylon Strip Type 9 Prevailing Torque Bolt, Out-of-Round Thread Area Type
A prevailing torque fastener may be reused ONLY if:
- The fastener and the fastener counterpart are clean and not damaged
- There is no rust on the fastener
- The fastener develops the specified minimum torque against its counterpart prior to the fastener seating
Metric Prevailing Torque Fastener Minimum Torque DevelopmentApplication Specification Metric English All Metal Prevailing Torque Fasteners 0.4 N.m 4 lb in 0.8 N.m 7 lb in 1.4 N.m 12 lb in 2.1 N.m 19 lb in 3 N.m 27 lb in 4.2 N.m 37 lb in 7 N.m 62 lb in 10.5 N.m 93 lb in Nylon Interface Prevailing Torque Fasteners 0.3 N.m 3 lb in 0.6 N.m 5 lb in 1.1 N.m 10 lb in 1.5 N.m 13 lb in 2.3 N.m 20 lb in 3.4 N.m 30 lb in 5.5 N.m 49 lb in 8.5 N.m 75 lb in
English Prevailing Torque Fastener Minimum Torque DevelopmentApplication Specification Metric English All Metal Prevailing Torque Fasteners 0.5 N.m 4.5 lb in 0.8 N.m 7.5 lb in 1.3 N.m 11.5 lb in 1.8 N.m 16 lb in 2.3 N.m 20 lb in 3.2 N.m 28 lb in 4 N.m 36 lb in 7 N.m 54 lb in Nylon Interface Prevailing Torque Fasteners 0.3 N.m 3 lb in 0.6 N.m 5 lb in 1 N.m 9 lb in 1.3 N.m 12 lb in 1.8 N.m 16 lb in 2.5 N.m 22 lb in 3.4 N.m 30 lb in 5 N.m 45 lb in
Thread Inserts
General purpose thread repair kits. These kits are available commercially.
Repair Procedure
- Determine the size, the pitch, and the depth of the damaged thread. If necessary, adjust the stop collars on the cutting tool and tap to the required depth.
- Drill out the damaged threads. Clean out any chips.
- Lubricate the tap with light engine oil. Tap the hole. Clean the threads.
- Thread the thread insert onto the mandrel of the installer. Engage the tang of the insert onto the end of the mandrel.
- Lubricate the insert with light engine oil, except when installing in aluminum and install the insert.
- If the tang of the insert does not break off when backing out the installer, break the tang off with a drift.
CAUTION: Refer to Safety Glasses Caution in Cautions and Notices.
IMPORTANT: Refer to the thread repair kit manufacturer's instructions regarding the size of the drill and tap to use.
Avoid any buildup of chips. Back out the tap every few turns and remove the chips.
Fig. 6: Drilling & Tapping Damaged Threads
Courtesy of GENERAL MOTORS CORP.
Fig. 7: Installing Thread Insert
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The insert should be flush to one turn below the surface.
Abbreviations and Meanings
Abbreviations and MeaningsAbbreviation Meaning A A Ampere(s) ABS Antilock Brake System A/C Air Conditioning AC Alternating Current ACC Accessory, Automatic Climate Control ACL Air Cleaner ACR4 Air Conditioning Refrigerant, Recovery, Recycling, Recharging AD Automatic Disconnect A/D Analog to Digital ADL Automatic Door Lock A/F Air/Fuel Ratio AH Active Handling AIR Secondary Air Injection ALC Automatic Level Control, Automatic Lamp Control AM/FM Amplitude Modulation/Frequency Modulation Ant Antenna AP Accelerator Pedal APCM Accessory Power Control Module API American Petroleum Institute APP Accelerator Pedal Position APT Adjustable Part Throttle ASM Assembly, Accelerator and Servo Control Module ASR Acceleration Slip Regulation A/T Automatic Transmission/Transaxle ATC Automatic Transfer Case, Automatic Temperature Control ATDC After Top Dead Center ATSLC Automatic Transmission Shift Lock Control Auto Automatic avg Average A4WD Automatic Four-Wheel Drive AWG American Wire Gage B B+ Battery Positive Voltage BARO Barometric Pressure BATT Battery BBV Brake Booster Vacuum BCA Bias Control Assembly BCM Body Control Module BHP Brake Horsepower BLK Black BLU Blue BP Back Pressure BPCM Battery Pack Control Module BPMV Brake Pressure Modulator Valve BPP Brake Pedal Position BRN Brown BTDC Before Top Dead Center BTM Battery Thermal Module BTSI Brake Transmission Shift Interlock Btu British Thermal Units C °C Degrees Celsius CAC Charge Air Cooler CAFE Corporate Average Fuel Economy Cal Calibration Cam Camshaft CARB California Air Resources Board CC Coast Clutch cm3 Cubic Centimeters CCM Convenience Charge Module, Chassis Control Module CCOT Cycling Clutch Orifice Tube CCP Climate Control Panel CD Compact Disc CE Commutator End CEAB Cold Engine Air Bleed CEMF Counter Electromotive Force CEX Cabin Exchanger cfm Cubic Feet per Minute cg Center of Gravity CID Cubic Inch Displacement CKP Crankshaft Position CKT Circuit C/Ltr Cigar Lighter CL Closed Loop CLS Coolant Level Switch CMC Compressor Motor Controller CMP Camshaft Position CNG Compressed Natural Gas CO Carbon Monoxide CO2 Carbon Dioxide Coax Coaxial COMM Communication Conn Connector CPA Connector Position Assurance CPP Clutch Pedal Position CPS Central Power Supply CPU Central Processing Unit CRT Cathode Ray Tube CRTC Cathode Ray Tube Controller CS Charging System CSFI Central Sequential Fuel Injection CTP Closed Throttle Position cu ft Cubic Foot/Feet cu in Cubic Inch/Inches CV Constant Velocity Joint CVRSS Continuously Variable Road Sensing Suspension Cyl Cylinder(s) D DAB Delayed Accessory Bus dB Decibels dBA Decibels on A-weighted Scale DC Direct Current, Duty Cycle DCM Door Control Module DE Drive End DEC Digital Electronic Controller DERM Diagnostic Energy Reserve Module DI Distributor Ignition dia Diameter DIC Driver Information Center Diff Differential DIM Dash Integration Module DK Dark DLC Data Link Connector DMCM Drive Motor Control Module DMM Digital Multimeter DMSDS Drive Motor Speed and Direction Sensor DMU Drive Motor Unit DOHC Dual Overhead Camshafts DPM Driver Position Module DR, Drvr Driver DRL Daytime Running Lamps DTC Diagnostic Trouble Code E EBCM Electronic Brake Control Module EBTCM Electronic Brake and Traction Control Module EC Electrical Center, Engine Control ECC Electronic Climate Control ECI Extended Compressor at Idle ECL Engine Coolant Level ECM Engine Control Module, Electronic Control Module ECS Emission Control System ECT Engine Coolant Temperature EEPROM Electrically Erasable Programmable Read Only Memory EEVIR Evaporator Equalized Values in Receiver EFE Early Fuel Evaporation EGR Exhaust Gas Recirculation EGR TVV Exhaust Gas Recirculation Thermal Vacuum Valve EHPS Electro-Hydraulic Power Steering EI Electronic Ignition ELAP Elapsed ELC Electronic Level Control E/M English/Metric EMF Electromotive Force EMI Electromagnetic Interference Eng Engine EOP Engine Oil Pressure EOT Engine Oil Temperature EPA Environmental Protection Agency EPR Exhaust Pressure Regulator EPROM Erasable Programmable Read Only Memory ESB Expansion Spring Brake ESC Electronic Suspension Control ESD Electrostatic Discharge ESN Electronic Serial Number ETC Electronic Throttle Control, Electronic Temperature Control, Electronic Timing Control ETCC Electronic Touch Climate Control ETR Electronically Tuned Receiver ETS Enhanced Traction System EVAP Evaporative Emission EVO Electronic Variable Orifice Exh Exhaust F °F Degrees Fahrenheit FC Fan Control FDC Fuel Data Center FED Federal All United States except California FEDS Fuel Enable Data Stream FEX Front Exchanger FF Flexible Fuel FFH Fuel-Fired Heater FI Fuel Injection FMVSS Federal U.S. Motor Vehicle Safety Standards FP Fuel Pump ft Foot/Feet FT Fuel Trim F4WD Full Time Four-Wheel Drive 4WAL Four-Wheel Antilock 4WD Four-Wheel Drive FW Flat Wire FWD Front Wheel Drive, Forward G g Grams, Gravitational Acceleration GA Gage, Gauge gal Gallon gas Gasoline GCW Gross Combination Weight Gen Generator GL Gear Lubricant GM General Motors GM SPO General Motors Service Parts Operations gnd Ground gpm Gallons per Minute GRN Green GRY Gray GVWR Gross Vehicle Weight Rating H H Hydrogen H2O Water Harn Harness HC Hydrocarbons H/CMPR High Compression HD Heavy Duty HDC Heavy Duty Cooling hex Hexagon, Hexadecimal Hg Mercury Hi Alt High Altitude HO2S Heated Oxygen Sensor hp Horsepower HPL High Pressure Liquid HPS High Performance System HPV High Pressure Vapor HPVS Heat Pump Ventilation System Htd Heated HTR Heater HUD Head-up Display HVAC Heater-Ventilation-Air Conditioning HVACM Heater-Vent-Air Conditioning Module HVIL High Voltage Interlock Loop HVM Heater Vent Module Hz Hertz I IAC Idle Air Control IAT Intake Air Temperature IC Integrated Circuit, Ignition Control ICCS Integrated Chassis Control System ICM Ignition Control Module ID Identification, Inside Diameter IDI Integrated Direct Ignition IGBT Insulated Gate Bi-Polar Transistor ign Ignition ILC Idle Load Compensator in Inch/Inches INJ Injection inst Instantaneous, Instant IP Instrument Panel IPC Instrument Panel Cluster IPM Instrument Panel Module I/PEC Instrument Panel Electrical Center ISC Idle Speed Control ISO International Standards Organization ISS Input Speed Shaft, Input Shaft Speed K KAM Keep Alive Memory KDD Keyboard Display Driver kg Kilogram kHz Kilohertz km Kilometer km/h Kilometers per Hour km/l Kilometers per Liter kPa Kilopascals KS Knock Sensor kV Kilovolts L L Liter L4 Four Cylinder Engine, In-Line L6 Six-Cylinder Engine, In-Line lb Pound lb ft Pound Feet Torque lb in Pound Inch Torque LCD Liquid Crystal Display LDCL Left Door Closed Locking LDCM Left Door Control Module LDM Lamp Driver Module LED Light Emitting Diode LEV Low Emissions Vehicle LF Left Front lm Lumens LR Left Rear LT Left LT Light LT Long Term LTPI Low Tire Pressure Indicator LTPWS Low Tire Pressure Warning System M MAF Mass Air Flow Man Manual MAP Manifold Absolute Pressure MAT Manifold Absolute Temperature max Maximum M/C Mixture Control MDP Manifold Differential Pressure MFI Multiport Fuel Injection mi Miles MIL Malfunction Indicator Lamp min Minimum MIN Mobile Identification Number mL Milliliter mm Millimeter mpg Miles per Gallon mph Miles per Hour ms Millisecond MST Manifold Surface Temperature MSVA Magnetic Steering Variable Assist, Magnasteer® M/T Manual Transmission/Transaxle MV Megavolt mV Millivolt N NAES North American Export Sales NC Normally Closed NEG Negative Neu Neutral NI Neutral Idle NiMH Nickel Metal Hydride NLGI National Lubricating Grease Institute N.m Newton-meter Torque NO Normally Open NOx Oxides of Nitrogen NPTC National Pipe Thread Coarse NPTF National Pipe Thread Fine NOVRAM Non-Volatile Random Access Memory O O2 Oxygen O2S Oxygen Sensor OBD On-Board Diagnostics OBD II On-Board Diagnostics Second Generation OC Oxidation Converter Catalytic OCS Opportunity Charge Station OD Outside Diameter ODM Output Drive Module ODO Odometer OE Original Equipment OEM Original Equipment Manufacturer OHC Overhead Camshaft ohms Ohm OL Open Loop, Out of Limits ORC Oxidation Reduction Converter Catalytic ORN Orange ORVR On-Board Refueling Vapor Recovery OSS Output Shaft Speed oz Ounce(s) P PAG Polyalkylene Glycol PAIR Pulsed Secondary Air Injection PASS, PSGR Passenger PASS-Key® Personalized Automotive Security System P/B Power Brakes PC Pressure Control PCB Printed Circuit Board PCM Powertrain Control Module PCS Pressure Control Solenoid PCV Positive Crankcase Ventilation PEB Power Electronics Bay PID Parameter Identification PIM Power Inverter Module PM Permanent Magnet Generator P/N Part Number PNK Pink PNP Park/Neutral Position PRNDL Park, Reverse, Neutral, Drive, Low POA Pilot Operated Absolute Valve POS Positive, Position POT Potentiometer Variable Resistor PPL Purple ppm Parts per Million PROM Programmable Read Only Memory P/S, PS Power Steering PSCM Power Steering Control Module, Passenger Seat Control Module PSD Power Sliding Door PSP Power Steering Pressure psi Pounds per Square Inch psia Pounds per Square Inch Absolute psig Pounds per Square Inch Gauge pt Pint PTC Positive Temperature Coefficient PWM Pulse Width Modulated Q QDM Quad Driver Module qt Quart(s) R R-12 Refrigerant-12 R-134a Refrigerant-134a RAM Random Access Memory, Non-permanent memory device, memory contents are lost when power is removed. RAP Retained Accessory Power RAV Remote Activation Verification RCDLR Remote Control Door Lock Receiver RDCM Right Door Control Module Ref Reference Rev Reverse REX Rear Exchanger RIM Rear Integration Module RF Right Front, Radio Frequency RFA Remote Function Actuation RFI Radio Frequency Interference RH Right Hand RKE Remote Keyless Entry Rly Relay ROM Read Only Memory, Permanent memory device, memory contents are retained when power is removed. RPM Revolutions per Minute Engine Speed RPO Regular Production Option RR Right Rear RSS Road Sensing Suspension RTD Real Time Damping RT Right RTV Room Temperature Vulcanizing Sealer RWAL Rear Wheel Antilock RWD Rear Wheel Drive S s Second(s) SAE Society of Automotive Engineers SC Supercharger SCB Supercharger Bypass SCM Seat Control Module SDM Sensing and Diagnostic Module SEO Special Equipment Option SFI Sequential Multiport Fuel Injection SI System International Modern Version of Metric System SIAB Side Impact Air Bag SIR Supplemental Inflatable Restraint SLA Short/Long Arm Suspension sol Solenoid SO2 Sulfur Dioxide SP Splice Pack S/P Series/Parallel SPO Service Parts Operations SPS Service Programming System, Speed Signal sq ft, ft2 Square Foot/Feet sq in, in2 Square Inch/Inches SRC Service Ride Control SRI Service Reminder Indicator SRS Supplemental Restraint System SS Shift Solenoid ST Scan Tool STID Station Identification Station ID S4WD Selectable Four-Wheel Drive Sw Switch SWPS Steering Wheel Position Sensor syn Synchronizer T TAC Throttle Actuator Control Tach Tachometer TAP Transmission Adaptive Pressure, Throttle Adaptive Pressure TBI Throttle Body Fuel Injection TC Turbocharger, Transmission Control TCC Torque Converter Clutch TCS Traction Control System TDC Top Dead Center TEMP Temperature Term Terminal TFP Transmission Fluid Pressure TFT Transmission Fluid Temperature THM Turbo Hydro-Matic TIM Tire Inflation Monitoring, Tire Inflation Module TOC Transmission Oil Cooler TP Throttle Position TPA Terminal Positive Assurance TPM Tire Pressure Monitoring, Tire Pressure Monitor TR Transmission Range TRANS Transmission/Transaxle TT Tell Tail Warning Lamp TV Throttle Valve TVRS Television and Radio Suppression TVV Thermal Vacuum Valve TWC Three Way Converter Catalytic TWC+OC Three Way + Oxidation Converter Catalytic TXV Thermal Expansion Valve U UART Universal Asynchronous Receiver Transmitter U/H Underhood U/HEC Underhood Electrical Center U-joint Universal Joint UTD Universal Theft Deterrent UV Ultraviolet V V Volt(s), Voltage V6 Six-Cylinder Engine, V-Type V8 Eight-Cylinder Engine, V-Type Vac Vacuum VAC Vehicle Access Code VATS Vehicle Anti-Theft System VCIM Vehicle Communication Interface Mode VCM Vehicle Control Module V dif Voltage Difference VDOT Variable Displacement Orifice Tube VDV Vacuum Delay Valve vel Velocity VES Variable Effort Steering VF Vacuum Fluorescent VIO Violet VIN Vehicle Identification Number VLR Voltage Loop Reserve VMV Vacuum Modulator Valve VR Voltage Regulator V ref Voltage Reference VSES Vehicle Stability Enhancement System VSS Vehicle Speed Sensor W w/ With W/B Wheel Base WHL Wheel WHT White w/o Without WOT Wide Open Throttle W/P Water Pump W/S Windshield WSS Wheel Speed Sensor WU-OC Warm Up Oxidation Converter Catalytic WU-TWC Warm Up Three-Way Converter Catalytic X X-valve Expansion Valve Y yd Yard(s) YEL Yellow
Registered and Non-Registered Trademarks
Listed below are Registered Trademarks (®) or Non-Registered Trademarks (™) which may appear in this service manual.
Registered and Non-Registered TrademarksA AC® ACCUTURN® ACDelco® Acuzinc® Airbank® Allison® AMMCO® AUTOFUSE® AUTOTRAC® B Bendix® BON-AMI® Bosch® Bose® C Catapillar® CAT® C-Quam® D Delco® Delco Bose® Delco Electronics® Delco Freedom® Delco LOC II® Delco Moraine® Delco Remy® Delco Sound® Delco Supreme® Delco Tech® DELCORE® Delphi® DEX-COOL® DEXOIL® DEXRON® DEXSTEER™ DNR® Dolby® DR® Duracell® Duraguard® Durastop® Duramax™ E Eaton Corporation® EMD® ETR® F FLO-LITE® G General Motors® GM® GM Goodwrench Service® GM Optikleen® GM Parts™ GM Pass® GM Ultralite® GMAC® Goodwrench® GTP® H Homelink™ HYDRA-MATIC® I Illumination® INSTA-TRAC® Intune® L LOCTITE™ M MAGNASTEER® Maxifuse® Metripack® Micropack® Minifuse® Mr Goodwrench® N Northstar® O OnStar® Optikleen® P PASS-KEY® PASS-KEYII® PASSLOCK™ PK3® Posidrive® Pro® Q Quad 4® R RAINSENSE™ Rapid Fire® S ScotchBrite™ Scotchguard™ Signals® Sikkens™ Soft-Ray® Solar-Ray® Stabilitrak® Sunrayce® Superlube® Syclone® T Tech 2® Techline® Teflon® Tefzel® Theft-I® Theftlock® Tiltmaster® TORX® Transjel® Transguide® Twilight Sentinel® U Ultralite® V Velcro® W Weatherpack™
Key and Lock Cylinder Coding
Key Identification and Usage
Fig. 8: Keys Cut Positions
Courtesy of GENERAL MOTORS CORP.
The keys are double sided and reversible. The master key and the valet key contain transponders that are read by the theft deterrent system when the keys are used in the ignition. The keys have 10 cuts positions (1) with 4 different depths (2).
The keys that are furnished with the vehicle are:
- The master key, that contains a transponder (3). This key will operate all of the locks on the vehicle.
- The valet key, that contains a transponder (3). This key will operate the door locks and the ignition lock only.
- The emergency key, that does not contain a transponder. This key will operate the door locks, and the IP storage compartment lock only. This key is only intended for emergency use.
Cutting Keys
Fig. 9: Keys Cut Positions
Courtesy of GENERAL MOTORS CORP.
You can obtain the key code from the 4-digit number on the key tag that accompanies the original master and valet keys. The 4-digit key code cross references to the cut and tumbler sequence. The keys have 10 key cut positions (1) and 4 key cut depths (2). Key cut positions are numbered 1-10, counting from the head of the key to the tip. The key cut depths are 1 through 4, cut depth number 1 is the deepest cut. The key transponder (3) in the master and valet key must be programmed to the vehicle. Refer to appropriate service procedure for programing the keys to the vehicle.
- Cut a blank key to the proper depth and sequence of each of the tumbler positions.
- Inspect the mechanical operation of the key in the lock cylinders, in the doors, the ignition switch, the rear compartment lid and any storage compartments:
With each side of the key pointing up inside the lock, inspect the operation of the lock in both directions.
- Turn the key both directions in each lock cylinder.
- Turn the key with each side of the key pointing upward in each lock cylinder.
- If replacing a master or valet key, program the key transponder to the vehicle.
Lock Cylinder Tumbler Operation
Each of the four cut depths on the key has corresponding tumblers (sometimes referred to as plates or wafers). The tumbler depth number is stamped on the tumblers for identification. The IP storage compartment lock cylinder also requires a retainer tumbler. The retainer tumbler is not moved by the key, its function is to retain the IP storage compartment lock cylinder in the lock assembly.
Assembling and Coding Ignition Lock Cylinder
The ignition lock cylinder only uses seven of the ten cut positions, 3 through 9. The tumbler positions are staggered from side to side, four on one side and three on the other.
- Hold the cylinder (7) so that the side with four tumbler spring wells is facing up.
- Insert tumbler springs (5) into the four spring wells.
- The first tumbler to be loaded will be the 3rd key cut position (the 3rd number in the key code). Install the first tumbler (4) in the slot nearest the front of the lock cylinder, this is the side the key would be inserted from.
- Install the three remaining tumblers on this side of the lock cylinder, key cut positions 5, 7 and 9.
- Snap the tumblers into place with light hand pressure.
- Check for correct loading of the tumblers (4) by inserting the key into the cylinder (7). All of the tumblers should be flush with the lock cylinder.
- Turn the cylinder (7) so that the side with the 3 tumbler spring wells is facing up.
- Insert the tumbler springs (5) into the three spring wells.
- Install the tumbler (4) for the key cut position 4 into the slot nearest to the front of the lock cylinder.
- Install the 2 remaining tumblers, key cut positions 6 and 8, on this side of the lock cylinder.
- Snap the tumblers into place with light hand pressure.
- Inspect for correct loading of the tumblers (4) by inserting the key into cylinder (7). All of the tumblers should be flush with the lock cylinder.
- Lightly lubricate the tumblers (4) surfaces using the provided lubricant.
- With the key inserted into the housing, align the retaining bar with the groove on the inside diameter of the cylinder housing. This groove extends through to the back of the lock housing (6).
- Lifting the flat spring and button, install the cylinder (7) into the cylinder housing (6). The retainer bar snaps into place when the cylinder (7) is fully seated.
Fig. 10: Exploded View Of Ignition Lock Cylinder
Courtesy of GENERAL MOTORS CORP.
Assembling and Coding Door Lock Cylinder
The door lock cylinder only uses seven of the ten cut positions, 3 through 9. The tumbler positions are staggered from side to side, 4 on one side and 3 on the other. The left and right door lock cylinders are identical. The lock pawl determines the side of the vehicle the lock cylinder is on.
- Hold the cylinder (5) so that the side with the 4 tumbler spring wells faces up.
- Insert tumbler springs (11) into the four spring wells.
- Install the tumbler for key cut position 3 in the slot nearest to the front of the lock cylinder.
- Install the 3 remaining tumblers, key cut positions 5, 7 and 9, on this side of the lock cylinder.
- Snap the tumblers into place with light hand pressure.
- Check for correct loading of the tumblers (12) by inserting the key into the cylinder (5). All of the tumblers should be flush with the lock cylinder.
- Turn the cylinder (5) so that the side with the 3 tumbler spring wells faces up.
- Insert the tumbler springs (11) into the 3 spring wells.
- Install the tumbler for key cut position 4 into the slot nearest the front of the lock cylinder.
- Install the 2 remaining tumblers for key cut positions 6 and 8 on this side of the lock cylinder.
- Snap the tumblers into place with light hand pressure.
- Check for correct loading of the tumblers (12) by inserting the key into the cylinder (5). All of the tumblers should be flush with the lock cylinder.
- Lightly lubricate the tumbler (12) surfaces using the provided lubricant.
- Install the 2 plate springs (6) into the 2 spring wells in the head of the door lock cylinder (5).
- Snap the shutter assembly (8) onto the cylinder.
- Insert the key into the lock cylinder.
- Place the detent spring (10) into the spring well located on the side of the lock cylinder (5).
- Carefully place the detent ball (9) on the detent spring (10).
- Depress the detent ball and spring and insert the cylinder (5) into the cylinder housing (4).
- Install the lock pawl (3).
- Install the lock pawl E-clip (2) to retain the lock pawl.
- Remove the key from the lock cylinder (5).
- Install the lock cylinder cap (7) by aligning the notch in the cap with the large drain slot in the lock housing (4).
Press the cap into place with light hand pressure.
Fig. 11: Assembling and Coding Door Lock Cylinder
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The door lock cylinder tumblers are not self-retaining. Hold the tumblers in place when the key is not in the lock cylinder. Hold the lock tumblers (12) in place when performing the next steps.
CAUTION: Wear safety glasses in order to avoid eye damage.
Assembling and Coding IP Storage Compartment Lock Cylinder
The IP storage compartment lock only uses 4 of the 10 cut positions 7 through 10. A retainer tumbler is used in the IP storage compartment lock to retain the lock cylinder in the latch assembly. This retainer tumbler is not moved by the key. The retainer tumbler occupies the slot closest to the head of the IP storage compartment lock cylinder and should come already installed in the cylinder.
- Hold the cylinder (3) so that the side with 4 tumbler spring wells is facing up.
- Insert tumbler springs (2) into the 4 spring wells.
- Install the tumbler (1) for key cut position 7 into the slot nearest to the front of the lock cylinder.
- Install the 3 remaining tumblers, key cut positions 8, 9 and 10, into the cylinder.
- Snap the tumblers into place with light hand pressure.
- Inspect for the correct loading of the tumblers (1) by inserting the key into cylinder (3). All of the tumblers should be flush with the lock cylinder.
Fig. 12: Assembling and Coding IP Storage Compartment Lock Cylinder
Courtesy of GENERAL MOTORS CORP.
Console Key
Fig. 13: Console Key
Courtesy of GENERAL MOTORS CORP.
The console key is available only on luxury vehicles. Use the console key in order to access or lock the center console. There is a number stamped on the key and the lock cylinder for cutting or for ordering a new key. The key information described does not refer to the console key. Contact the Presto Lock Company at 248-594-9500 and supply Presto Lock Company with the cylinder code. Presto Lock Company will supply the key cut information or provide a copy of the key.
Lifting and Jacking the Vehicle
CAUTION: To avoid any vehicle damage, serious personal injury or death, always use the jackstands to support the vehicle when lifting the vehicle with a jack.
CAUTION: To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed.
NOTE: Perform the following steps before beginning any vehicle lifting or jacking procedure:
Failure to perform the previous steps could result in damage to the lifting equipment or the jacking equipment, the vehicle, and/or the vehicle's contents.
For lifting the vehicle, various lift points are recommended. Before you begin any lifting procedure, place the vehicle on a clean, hard, level surface. Verify that all the lifting equipment meets weight standards and is in good working order. Verify that all of the vehicle loads are equally distributed and secure. If you are only supporting the vehicle at the frame side rails, verify that the lifting equipment does not put too much stress on, or weaken, the frame side rails.
During hoisting, do NOT damage the fuel tanks, the exhaust system, or the underbody.
Fig. 14: Vehicle Lifting And Jacking Points
Courtesy of GENERAL MOTORS CORP.
Callout Component Name 1 Lower Control Arm Contact Points 1 Lower Control Arm Contact Points 2 Front Frame Contact Points 2 Front Frame Contact Points 3 Rear Frame Contact Points 3 Rear Frame Contact Points 4 Rear Axle Contact Points 4 Rear Axle Contact Points 5 Differential Contact Points
Frame Contact Hoist
Front Hoist Pads
Fig. 15: Front Hoist Pads
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The front hoist pads must not contact the rocker panels, the front fenders, or the floor pan.
Position the front hoist pads under the front frame between the lower control arm and the frame pad.
Rear Hoist Pads
Fig. 16: Rear Hoist Pads
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The rear hoist pads must not contact the body rocker panels or the floor pan.
Position the rear hoist pads under the rear spring, just behind the hanger
Suspension Contact Hoist
Front Lift
Fig. 17: Front Suspension Lift Points
Courtesy of GENERAL MOTORS CORP.
Position the front lift under the outer edge of the front suspension lower control arms.
Rear Lift
Fig. 18: Rear Axle Housing Lift
Courtesy of GENERAL MOTORS CORP.
Position the rear lift under the axle housing tubes on each side of the differential.
Do not damage the stabilizer bar.
Jacking
When you are lifting a vehicle with a vehicle jack or a floor jack, block the wheels at the opposite end from which you are lifting. Use jack stands to provide additional support.
Under the Frame Rails
Fig. 19: Frame Rail Jacking Point
Courtesy of GENERAL MOTORS CORP.
IMPORTANT: The floor jack pad must not contact rocker panel or the floor pan.
Position the floor jack pad under the frame rail pad.
Under the Rear Differential
Fig. 20: Rear Differential Lifting Point
Courtesy of GENERAL MOTORS CORP.
Position the floor jack pad under the center of the rear axle differential.
Do not damage the establisher bar.
Under the Rear Spring Hanger
Fig. 21: Rear Spring Hanger Lifting Point
Courtesy of GENERAL MOTORS CORP.
Position the jack under the rear spring hanger.
Jack Stands
When you support the vehicle with jack stands, place the jack stands under the frame, the front suspension crossmember, or the rear axle.
Strategy Based Diagnosis
The goal of Strategy Based Diagnostics is to provide guidance when you create a plan of action for each specific diagnostic situation. Following a similar plan for each diagnostic situation, you will achieve maximum efficiency when you diagnose and repair vehicles. Although each of the Strategy Based Diagnostics boxes is numbered, you are not required to complete every box in order to successfully diagnose a customer concern. The first step of your diagnostic process should always be, verify the Customer Concern box. The final step of your diagnostic process should be Repair and verify the Fix box 7. Refer to the following chart for the correct Strategy Based Diagnostics.
Fig. 22: Strategy Based Diagnosis Chart
Courtesy of GENERAL MOTORS CORP.
Callout Component Name 1 Verify the Customer Concern: The first part of this step is to obtain as much information as possible from the customer. Are there aftermarket accessories on the vehicle? When does the condition occur? Where does the condition occur? How long does the condition last? How often does the condition occur? In order to verify the concern, the technician should be familiar with the normal operation of the system and refer to the owner or service manual for any information needed. 2 Preliminary Checks: Conduct a thorough visual inspection. Review the service history. Detect unusual sounds or odors. Gather diagnostic trouble code (DTC) information in order to achieve an effective repair. 3 Perform Published Diagnostic System Checks: One or more DTCs may not support a system. System checks verify the proper operation of the system. This will lead the technician in an organized approach to diagnostics. 4 Check Bulletins and Other Service Information: Use videos, newsletters, and the Pulsat programs. 5.1 Stored DTCs: Follow the designated DTC table exactly in order to make an effective repair. 5.2 Symptom No DTC: Select the symptom from the symptom tables. Follow the diagnostic steps or suggestions in order to complete the repair, or refer to the applicable component/system check. 5.3 No Published Diagnostics: Analyze the Concern. Develop a plan for the diagnostics. The service manual schematics will help you to see system power, ground, input and output circuits. You can also identify splices and other areas where multiple circuits are tied together. Look at component locations to see if components, connectors or harnesses may be exposed to extreme temperature, moisture, road salt or other corrosives battery acid, oil or other fluids. Utilize the wiring diagrams, system description and operation, and system circuit description. 5.4 Intermittents: An intermittent condition is one that does not occur continuously and will occur when certain conditions are met. Generally, intermittents are caused by faulty electrical connections and wiring, malfunctioning components, electromagnetic/radio frequency interference, and aftermarket equipment. Combine technician knowledge with efficient use of the available service information. Evaluate the symptoms and conditions described by the customer. Use a check sheet or other method in order to identify the component. Follow the suggestions for intermittent diagnosis found in the service manual. The Tech 1 and Tech 2 scan tools, and the J 39200 (Fluke 87) have data capturing capabilities that can assist in detection of intermittents. 5.5 Vehicle Operates as Designed: This condition exists when the vehicle is found to operate normally. The condition described by the customer may be normal. Verify against another like vehicle that is operating normally under the same conditions described by the customer. Explain your findings and the operation of that system to the customer. 6 Re-examine the Concern: If a technician cannot successfully find or isolate the concern, a re-evaluation is necessary. Re-verify the concern. The concern could be an intermittent or normal. 7 Repair and Verify Fix: After isolating the cause, make the repairs and validate for proper operation. Verify that the symptom has been corrected, which may involve road testing the vehicle.
Special Tools and Equipment
Special Tools
Special ToolsTool Illustration Tool Number/ Description 
click to open the imageJ 41340
Ignition Lock Holding Fixture
