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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+

    Cooling Fans -> Light Duty Trucks & Vans -> COMPONENT REPLACEMENT -> C, K, G & P Series -> ELECTRIC COOLING FAN -> Lumina APV, Silhouette & Trans Sport
    Vehicle: 1995 GMC C1500 Pickup Sierra 6.5 V8 DIESEL

    ELECTRIC COOLING FAN

    Lumina APV, Silhouette & Trans Sport
    • Remove lamp harness from fan frame, then disconnect fan connector.
    • Remove fan attaching bolts.
    • Remove fan and frame as an assembly.
    • Reverse procedure t...

    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+.

    Hydraulic Brake Systems -> Brake System Bleed -> Hydraulic System Flush -> Manual Bleed -> Master Cylinder Bleed -> Parking Brake Bleed -> Pressure Bleed
    Vehicle: 1993 GMC K3500 Pickup Sierra 6.2 V8 DIESEL

    Manual Bleed

    • If vehicle is equipped with power brakes, remove vacuum reserve by applying brakes several times with engine off.
    • Fill master cylinder reservoirs with suitable brake fluid. Be sure to always keep master cylinder reservoirs at least half full during entire bleeding procedure.
    • If master cylinder is suspected to have air in the bore, it must be bled first, as follows:
      • Disconnect forward brake pipe connection at master cylinder.
      • Allow brake fluid to fill master cylinder bore until it begins to flow from forward pipe connector port.
      • Connect and tighten forward brake pipe at...

    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: 2004 GMC Yukon XL 2500 6.0 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 -> One Piece Driveshaft -> Three Piece Driveshaft -> Two Piece Driveshaft
    Vehicle: 1996 GMC C3500 Pickup Sierra XC 5.7 V8 GAS

    One Piece Driveshaft
    • Reference mark propeller shaft to pinion flange connection.
    • Reference mark slip yoke to transmission for proper reassembly.
    • When servicing driveshafts with pop on seal, do not remove seal from sleeve. Removal of seal causes damage to seal lip where it contacts sleeve yoke. If removal of seal is necessary, replace seal with a new unit.
    • Remove bolts.
    • Remove retainers.
    • Remove yoke and cross assembly, wrapping bearing cups with tape in order to prevent loss of bearing rollers. When removing propeller shaft, do not attempt to remove shaft by pounding on yoke ears o...

    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: 2008 GMC Canyon SLE 2.9 L4 GAS

    Refer to F...

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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: 1990 GMC V3500 Pickup 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 mounting bracket.
    • Rem...

    CLICK HERE TO GET FULL ACCESS TO GMC STARTER & ALTERNATOR REPLACEMENT PROCEDURES

    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 2500 HD Classic SLE 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 -> Reduce Engine Power Indicator Lamp ->
    Vehicle: 1992 GMC G25/G2500 VAN Rally 5.0 V8 GAS

    The Reduce Engine Power indicator lamp should light for a approximately 3 seconds when the ignition is turned On as a bulb check. If the warning lamp turns On during vehicle operation, a vehicl...

    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+

    Radiator, Replace
    Vehicle: 1990 GMC G25/G2500 VAN Rally 6.2 V8 DIESEL

    • Drain cooling system into a suitable container.
    • Remove upper fan shroud.
    • Remove radiator hose inlet.
    • Remove radiator hose outlet.
    • Remove transmission oil cooler lines.
    • Remove overflow hose.
    • Remove ...

    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: 1996 GMC C2500 Pickup Sierra XC 7.4 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+.

    A/C Compressor and Hoses Diagram for 2005 GMC Sierra 1500 Hybrid 5.3 V8 ELECTRIC/GASA/C Compressor and Hoses Diagram for 2005 GMC Sierra 1500 Hybrid 5.3 V8 ELECTRIC/GAS

    Components on diagram:
  • A/C Compressor Clutch
  • A/C Refrigerant Pressure Sensor
  • LH Side Of Engine   Diagram for 1990 GMC R3500 Pickup  7.4 V8 GASLH Side Of Engine Diagram for 1990 GMC R3500 Pickup 7.4 V8 GAS

    Components on diagram:
  • Water Temperature Sensor
  • Oxygen Sensor
  • Oil Pressure Switch
  • Windshield Wiper Motor
  • Coolant Temperature Sensor
  • 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.

    1990 GMC C3500 Pickup Sierra 5.7 V8 GAS Wiring Diagram1990 GMC C3500 Pickup Sierra 5.7 V8 GAS Wiring Diagram

    Components on diagram:
  • Horn Relay
  • Directional Signal Switch
  • 2004 GMC Envoy  4.2 L6 GAS Wiring Diagram2004 GMC Envoy 4.2 L6 GAS Wiring Diagram

    Components on diagram:
  • Headlamp Switch
  • 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: CONTAMINATED R-134A A/C SYSTEMS - AIR CONDITIONING SYSTEM FLUSHING PROCEDURES AND GUIDELINES - REVISED
    Vehicle: 1999 GMC Savana 1500 5.0 V8 GAS

    Auto Systems:
  • Heating, A/C, Ventilation, Defogger
  • Document: INFORMATION ON 4T65-E MN7, M15, M76, MN3 AUTOMATIC TRANSMISSION CASE, COOLER FITTING AND TORQUE CONVERTER DRAIN BACK CHECK BALL CHANGE - REVISED
    Vehicle: 2007 GMC Savana 1500 4.3 V6 GAS

    Auto Systems:
  • Automatic Trans, Coolers, Torque Converter
  • 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!

    Shop online for auto body parts, engines, wheels, lights...

    Click here to view more details about 1996 GMC C1500 Helper Spring1996 GMC C1500 Helper Spring, Enough for 2 leaf springs; Includes mounting hardware; Bolts on to stock leaf springs; Provides up to 1,000 lbs. of level load capacity; Ensures a safer ride by giving you more stability through level load management; Eliminates rear end sagging; Easy to install; Best for lighter cargo; For heavier loads, we recommend the LP series; This product is not designed to be used for exceeding the manufacturer's maximum gross vehicle weight rating..

    Source: Auto Body Parts Store

    $97.64

    Click here to view more details1997 GMC C1500 Fan Clutch, Heavy-duty thermal design; 7.2 in. overall diameter, M30 x 1.5 pilot diameter/thread size, 0.7 in. pilot depth, 1.44 in. hexagonal flange diameter, 1.75 in. fan mount height, 3.25 in. fan bolt circumference, 2.52 in. fan mount diameter, 3.47 in. overall height; AutoTrust Platinum products are guaranteed to meet or exceed the original manufacturer's standards and quality; <b>Backed by a 5-year unlimited warranty</b>; If the part breaks or is damaged anytime within 5 years from purchase, simply cover shipping and handling and we will send you a new part - even if we have already sent you a new product and it becomes damaged again..

    Source: Auto Body Parts Store

    $34.46

    Click here to view more details about 2004 GMC Sonoma Pickup Tail Light Tail Light Lens And Housing , Passenger Side2004 GMC Sonoma Pickup Tail Light Tail Light Lens And Housing , Passenger Side, PASSENGER SIDE TAIL LIGHT TAIL LIGHT LENS AND HOUSING , , .

    Source: Wheels / Rims, Mirrors & Lights Store

    $49.45

    Click here to view more details about 1985 GMC C15/C1500 Pickup V8, 5.7 L, 350 CID Rebuilt Engine1985 GMC C15/C1500 Pickup V8, 5.7 L, 350 CID Rebuilt Engine, Flat lifters, 2-bolt main., Warranty: 7-Year/70,000 Mile, .

    Source: Rebuilt Engines Store

    $1,187.00

    Click here to view more details1976 GMC C15/C1500 Pickup Used Distributor, 5.7, Very Good.

    Source: Used Auto Parts Store

    $86.00

    Click here to view more details1988 GMC C1500 Pickup Used Exhaust Manifold, 8-350 (5.7L), L., Without AIR; UNLEADED FUEL, Very Good.

    Source: Used Auto Parts Store

    $96.00
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