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GMC CAR/TRUCK REPAIR PROCEDURES AND DIAGRAMS - WHAT GMC REPAIR SHOPS DON'T WANT YOU TO KNOW

Learn how to repair a car or truck, install or remove parts, wire an engine, reset warning lights, replace fuel filter, fix auto body and more. Get Automotix DIY!

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    Get Full Access Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about GMC car and truck repair procedures including GMC engine diagrams, wiring diagrams, repair work estimating measures, technical service bulletins, auto body work guidance, starter & alternator replacement procedures, serpentine belt replacement procedures, radiator & hose replacement procedures, tune-up & drivability specifications, quick lube illustrations, preventive maintenance guide, engine light reset instructions, parts removal and install procedures, fuel filter replacement directions, component location diagrams, air filter locations & replacement instructions, a/c system specifications, and general auto service procedures. You don't have to be a car mechanic or technician to know how to fix your GMC automobile. Try the Automotix DIY solution today!
    DIY REPAIR SAMPLES > CONTINUE EXPLORING >
    Using the Automotix DIY repair procedures will save you hundreds and even thousands of dollars! In addition, it will save you hours of touring the city searching for GMC mechanics you can trust. The Automotix DIY solution is particularly affordable. A full access to the entire DIY repair procedures and diagrams for your GMC vehicle will cost less than a single gallon of gas. Here are some of the DIY repair tips and procedures you will find here:

    A/C & HEATER SERVICE PROCEDURES FOR GMC AUTOMOBILES

    Air Conditioner and Heater Service Includes module configuration procedures, general service, maintenance, automatic temperature control, compressor services, electric cooling fans, vacuum diagrams, specifications, and manual air conditioning and heater diagnostics and replacement procedures for domestic and imported GMC cars and light trucks from 1990+

    A/C & Cooling System Maintenance -> General Motors Corp. -> 2003-04 Chevrolet Silverado, Suburban, Tahoe & Cadillac Escalade & GMC Denali, Sierra, Yukon & Yukon XL
    Vehicle: 2003 GMC Yukon XL 2500 6.0 V8 GAS

    [[table data]]

    CLICK HERE TO GET FULL ACCESS TO GMC A/C & HEATER SERVICE PROCEDURES

    BRAKE SERVICE PROCEDURES FOR GMC AUTOMOBILES

    Includes anti-lock brakes, disc, drum, power and hydraulic brake services diagnostics and procedures for domestic and imported GMC cars and light trucks from 1990+.

    POWER BRAKE UNITS, GENERAL MOTORS -> Delco-Moraine Brake Boosters -> SINGLE DIAPHRAGM TYPE -> Assemble -> BOOSTER SERVICE -> DESCRIPTION -> Disassemble -> OPERATION
    Vehicle: 1990 GMC C3500 Pickup Sierra XC 5.7 V8 GAS

    DESCRIPTION

    These power brake units, Figs. and , are a combination vacuum-hydraulic brake booster of the vacuum suspended type which use engine intake manifold vacuum and atmospheric pressure for its power.

    These units consist of a vacuum power section and an hydraulic master cylinder section. The vacuum power section contains a power piston with rolling diaphragm mechanism and power piston return spring.

    The control valve is made up of an air valve and floating vacuum control valve assembly. The reaction mechanism consists of an hydraulic piston, reaction plate and a series...

    CLICK HERE TO GET FULL ACCESS TO GMC BRAKE SERVICE PROCEDURES

    FUEL FILTER REPLACEMENT PROCEDURES FOR GMC AUTOMOBILES

    Fuel filter replacement procedures with corresponding images for most domestic and imported GMC cars and light trucks sold in the U.S. for 1980+.

    General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Pressure Relief -> Except Montana SV6, Relay, Rendezvous w/3.6L Engine, Terraza, Tracker & Uplander -> Engine Fuel Pressure Service Port -> Engines Less Fuel Pressure Service Port
    Vehicle: 1991 GMC C3500 Pickup Sierra XC 5.7 V8 GAS

    Do not smoke or allow an open flame of any type when working on or near any fuel system related components. The highly flammable vapor mixtures may ignite, resulting in serious personal injury.

    Prior to disconnecting fuel lines, the fuel system pressure must be relieved to prevent accidental spray of fuel.

    After the battery has been disconnected and reconnected, some abnormal driveability symptoms may occur. The vehicle may need to be driven while the vehicle relearns its adaptive strategy.

    Engines Less Fuel Pressure ...

    CLICK HERE TO GET FULL ACCESS TO GMC FUEL FILTER REPLACEMENT PROCEDURES

    DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR GMC AUTOMOBILES

    Includes CV axle, universal joint, and driveline replacement, for domestic and imported GMC cars and light trucks from 1990+.

    DRIVESHAFT, Replace -> Front -> Front, All Except NP8 Axle -> Front, NP8 Axle -> One Piece Driveshaft -> Rear -> Three Piece Driveshaft -> Two Piece Driveshaft
    Vehicle: 1994 GMC K2500 Pickup Sierra 7.4 V8 GAS

    Front

    Front, All Except NP8 Axle
    • Raise and support vehicle.
    • Remove front differential carrier shield, if used.
    • Reference mark relationship of propeller shaft to front axle and transfer case flange.
    • Remove bolts and retainers from front axle.
    • Remove bolts and retainers from transfer case.
    • Remove propeller shaft. When removing propeller shaft, do not attempt to remove shaft by pounding on yoke ears or using a tool between yoke and universal joint. If propeller shaft is removed by using such means, injection joints may fracture and lead to premature failure of joint.
    • Compress propeller...

    CLICK HERE TO GET FULL ACCESS TO GMC DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES

    TIRE PRESSURE MONITORING SYSTEM PROCEDURES FOR GMC AUTOMOBILES

    Description, component locations, reset procedures, relearn procedures, diagnosis and testing, wiring diagrams, component replacement, and identification of vehicles equipped and not equipped with tire pressure monitoring system for most domestic and imported GMC cars and light trucks sold in the U.S. from mid 1990's+.

    Component Locations
    Vehicle: 2007 GMC Sierra 3500 HD WT 6.0 V8 GAS

    Refer to Fig...

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    STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR GMC AUTOMOBILES

    Includes starter and alternator replacement procedures for domestic and imported GMC cars and light trucks from 1990+.

    Alternator, Replace
    Vehicle: 1992 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL

    • Disconnect battery ground cable.
    • Disconnect terminal plug and battery lead from rear of alternator.
    • Remove accessory drive belt.
    • Remove alternator mounting bolts.
    • Separate alternator from mount...

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    CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR GMC AUTOMOBILES

    Cabin air filter locations and replacement procedures with corresponding images for most domestic and imported GMC cars and light trucks sold in the U.S. as equipped to the current model year.

    Cabin Air Filter Service -> General Motors Corp./Saturn -> 1999-2007 Silverado, Sierra, 2000-07 Denali, Suburban, Tahoe, Yukon, Yukon XL, 2001-07 Escalade & 2002-07 Avalanche
    Vehicle: 2007 GMC Sierra 3500 Classic SL 8.1 V8 GAS

    Under normal operating conditions the cabin air filter should be replaced every 15,000 miles. In dusty areas change the cabin air filter more often.

    • Remove the righthand instrument panel hush panel.
    • Remove the A/C and heater modul...

    CLICK HERE TO GET FULL ACCESS TO GMC CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES

    MAINTENANCE LAMP RESET PROCEDURES FOR GMC AUTOMOBILES

    Maintenance lamp reset procedures with corresponding images for most domestic and imported GMC cars and light trucks sold in the U.S. from 1990+.

    General Motors Corp./Saturn Trucks -> Air Cleaner Restriction Indicator ->
    Vehicle: 1998 GMC Jimmy 4.3 V6 GAS

    An air cleaner restriction indicator, Fig. , is located in the intake duct between the MAF sensor and the air cleaner assembly.

    If the window shows green, no service is required at this time. However, if...

    CLICK HERE TO GET FULL ACCESS TO GMC MAINTENANCE LAMP RESET PROCEDURES

    RADIATOR & HOSE REPLACEMENT PROCEDURES FOR GMC AUTOMOBILES

    Includes radiator, cooling and heater hose replacement procedures for domestic and imported GMC cars and light trucks from 1990+

    Heater Hose, Replace -> Inlet -> Outlet
    Vehicle: 1991 GMC C1500 Pickup Sierra 5.0 V8 GAS

    Inlet

    • Drain cooling system into a suitable container.
    • Reposition hose clamp at heater core.
    • Remove inlet heater hose from heater core.
    • Reposition hose clamp at thermostat housing.
    • Remove inlet heater hose from thermostat housing.
    • Remove hose from vehicle.
    • Reverse proc...

    CLICK HERE TO GET FULL ACCESS TO GMC RADIATOR & HOSE REPLACEMENT PROCEDURES

    SERPENTINE BELT SERVICE PROCEDURES FOR GMC AUTOMOBILES

    Serpentine belt replacement procedures with corresponding images for most domestic and imported GMC cars and light trucks sold in the U.S. from 1990+.

    Serpentine Drive Belt, Replace
    Vehicle: 1997 GMC K1500 Pickup Sierra XC 5.0 V8 GAS

    • Rotate tensioner counterclockwise, using a 1/2 inch breaker bar with a socket placed on tensioner ...

    CLICK HERE TO GET FULL ACCESS TO GMC SERPENTINE BELT SERVICE PROCEDURES

    COMPONENT LOCATION DIAGRAMS FOR GMC AUTOMOBILES

    Component location diagrams for most GMC cars and light trucks sold in the U.S. from 1990+.

    Body Harness Diagram for 2006 GMC Sierra 3500 WT 6.0 V8 GASBody Harness Diagram for 2006 GMC Sierra 3500 WT 6.0 V8 GAS

    Components on diagram:
  • Air Bag Control Module
  • Ground G305
  • Connector C305
  • B-Pillar
  • Instrument Panel and Engine Compartment Components Diagram for 2008 GMC Sierra 1500 WT 4.3 V6 GASInstrument Panel and Engine Compartment Components Diagram for 2008 GMC Sierra 1500 WT 4.3 V6 GAS

    Components on diagram:
  • Left Front Fender
  • Ground G110
  • X103
  • J113
  • X109
  • CLICK HERE TO GET FULL ACCESS TO GMC PARTS/COMPONENTS LOCATION DIAGRAMS!

    WIRING DIAGRAMS FOR GMC AUTOMOBILES

    OEM drawn wiring diagrams for most GMC cars and light trucks sold in the U.S.

    1996 GMC G25/G2500 VAN Savana 5.7 V8 GAS Wiring Diagram1996 GMC G25/G2500 VAN Savana 5.7 V8 GAS Wiring Diagram

    Components on diagram:
  • LH Front Side marker Lamp
  • RH Front Side Marker Lamp
  • LH Front Park/Turn Signal Lamp
  • RH Front Park/Turn Signal Lamp
  • 2007 GMC Yukon XL 1500 SLT 5.3 V8 GAS Wiring Diagram2007 GMC Yukon XL 1500 SLT 5.3 V8 GAS Wiring Diagram

    Components on diagram:
  • Passenger Seat Adjuster Switch
  • Passenger Seat Rear Vertical Motor
  • Passenger Seat Front Vertical Motor
  • Passenger Seat Horizontal Motor
  • Passenger Seat Recline Motor
  • CLICK HERE TO GET FULL ACCESS TO GMC WIRING DIAGRAMS!

    TECHNICAL SERVICE BULLETINS FOR GMC AUTOMOBILES

    OEM TSB listings for most GMC cars and light trucks sold in the U.S. from 1985+.

    Document: IM240 - PROGRAM UPDATE
    Vehicle: 1987 GMC R2500 Pickup 4.8 L6 GAS

    Auto Systems:
  • Emission Controls, Vacuum Hoses
  • Document: INFORMATION ON THE USE OF CUSTOMER CONCERN VERIFICATION SHEET - REVISED
    Vehicle: 1995 GMC K2500 Suburban 5.7 V8 GAS

    Auto Systems:
  • Labor Times, Manuals, Warranty, Aids
  • CLICK HERE TO GET FULL ACCESS TO GMC TECHNICAL SERVICE BULLETINS!

    COMPONENT/PARTS SPECIFICATIONS FOR GMC AUTOMOBILES

    BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most GMC cars and light trucks sold in the U.S. and Canada from 1970+.

    • Brake caliper mounting bolt torque
    • Brake drum runout, machining, & discard specs
    • Minimum brake lining thickness.
    • Brake rotor runout, parallelism, machining, discard, & finish specs

    A/C SYSTEM SPECIFICATIONS: Air conditioning refrigerant capacity and type as well as lubricant capacity for most GMC cars and light trucks sold in the U.S. and Canada from 1980+.

    • Refrigerant capacity & type, compressor oil viscosity, total system oil capacity & compressor clutch gap

    COOLING SYSTEM BLEED: Cooling system bleeder valve identification, bleeder type and bleed procedures for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1986+.

    PREVENTIVE MAINTENANCE: Preventive maintenance recommendations and required services for most domestic and imported cars and light trucks sold in the U.S. and Canada from 1980+. Includes severe and routine service schedules

    QUICK-LUBE and ILLUSTRATIONS: Fluid recommendations, capacities, drain plug torques, tire data, and severe service recommended preventive maintenance schedules. Information covers most GMC cars and light trucks sold in the U.S. and Canada from 1980+. Engine and chassis service images.

    • Automatic transmission/transaxles capacities, lubricant recommendations
    • Differential/final drive capacities, lube recommendations, grades, & viscosities
    • Final drive fill & drain plug torques
    • Number of lubrication fittings & plugs
    • Power steering, brake, & clutch fluid recommendations
    • Manual transmission/transaxle capacities, lube recommendations, grades, & viscosities
    • Number of lubrication fittings & plugs
    • Power steering, brake, & clutch fluid recommendations
    • Engine oil capacities, API grade recommendations, SAE viscosity recommendations, drain plug torque
    • Severe service maintenance & interval recommendations
    • Tire sizes, wheel nut/bolt torque, pressures & rim sizes
    • Transfer case capacities, lube recommendations, grades, & viscosities

    TUNE-UP & DRIVEABILITY SPECIFICATIONS: Most tune-up specifications for most GMC cars and light trucks sold in the U.S. and Canada from 1980+

    • Airflow sensor electrical specifications
    • Tensioning specifications for systems with automatic tensioners
    • Barometric pressure sensor specs
    • Battery group number and cranking performance
    • Crankshaft & camshaft position sensor resistance
    • Engine compression pressures
    • Coolant temperature sensor specs
    • Computer advance.
    • Diesel fuel temperature sensor resistance.
    • Distributor advance specifications
    • Ignition pickup coil resistance
    • Exhaust gas recirculation temperature sensor resistance
    • Engine fastener torque values
    • Firing order diagrams
    • Fuel system pressures
    • Generator (alternator) specs
    • Intake air temperature sensor specs
    • Ignition coil specifications
    • Fuel injector resistance
    • Engine idle speeds
    • Knock sensor resistance
    • Manifold absolute pressure sensor specs
    • Mixture control solenoid resistance
    • Voltage regulator specs
    • Spark plug applications & gaps
    • Starter motor electrical specs.
    • Tensioning specifications for systems without automatic tensioners
    • Throttle body temperature sensor resistance
    • Ignition timing in degrees at rpm
    • Transmission oil temperature sensor resistance
    • Throttle position sensor specs
    • Vacuum sensor valve specs

    CLICK HERE TO GET FULL ACCESS TO GMC SPECIFICATIONS DATA!

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    Click here to view more details about 2003 GMC Sonoma Bumper, Rear2003 GMC Sonoma Bumper, Rear, With step pad provision and license plate holes; A high quality, OE replacement step bumper; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $109.59

    Click here to view more details about 2005 GMC Yukon Headlight Bracket, Passenger Side2005 GMC Yukon Headlight Bracket, Passenger Side, A high quality, OE replacement headlight housing support; Backed by 1-year, unlimited-mileage warranty..

    Source: Auto Body Parts Store

    $16.72

    Click here to view more details2010 GMC Terrain Cci Grille Overlay, CCI GRILLE OVERLAY, 1 PIECE, 2010 GMC TERRAIN , , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $156.25

    Click here to view more details1984 GMC Caballero V6, 3.8 L, 231 CID Rebuilt Engine, RWD, 14 bolt pan, Warranty: 7-Year/70,000 Mile, .

    Source: Rebuilt Engines Store

    $1,299.00

    Click here to view more details1981 GMC C1500 Suburban Used Distributor, 8-305 (5.0L); FED, 4X2, Automatic Transmission, Very Good.

    Source: Used Auto Parts Store

    $86.00

    Click here to view more details1998 GMC Jimmy Used Bumper Cover, Front, OE#-12377119-P, GMC; SL & SLS, 4X2, Very Good.

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    $167.00
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