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2003 GMC Sierra 1500 HD 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!Select Section
- Component Locations
- Wiring Diagrams
- Technical Service Bulletins
- Specifications
- A/C & Heater Service
- Brake Service
- Fuel Filter Replacement
- Driveline, U-Joint & CV Axles Replacement
- Starter & Alternator Replacement
- Cabin Air Filter Locations & Replacement
- Maintenance Lamp Reset
- Radiator & Hose Replacement
- Serpentine Belt Service
Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 GMC Sierra 1500 HD 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 Sierra 1500 HD automobile. Try the Automotix DIY solution today!
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Domestic Vehicles
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
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BRAKE SERVICE PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
Power Brake Units -> Bendix Brake Booster -> General Service
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
Certain general service procedures apply, regardless of whether the brakes are vacuum or hydraulically assisted. Only top quality, clean brake fluid should be used. More seals and valves are used with power brake systems than with ordinary brakes, so an inferior brake fluid will do much more damage. For the same reason, ensure all dirt is kept out of the system. Additionally, care must be taken not to mix the fluids of the booster hydraulic system and brake hydraulic system as the fluids are not compatible.
If the power unit fails, the brakes will still operate, as the convention...
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FUEL FILTER REPLACEMENT PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
General Motors Corp./Saturn Light Trucks, SUVs & Vans -> Fuel Filter Replacement -> Gasoline Engines Except Equinox, Montana SV6, Relay, Rendezvous w/3.6L Engine, Terraza, Uplander & Vue (2004-06) & 2004-06 Envoy, Rainier & TrailBlazer -> Returnless Fuel System
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
Returnless Fuel System
On models equipped with fuel injected engines, relieve fuel system pressure as outlined under "Fuel System Pressure Relief."
On models equipped with metal collar quick disconnect connectors, GM tool No. J37088-A, or equivalent, will be required to disconnect the connector. Pri...
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DRIVELINE, U-JOINT & CV AXLES REPLACEMENT PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
CV AXLE SHAFT, Replace
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
- Raise and support vehicle.
- Remove wheel and tire assembly.
- Remove drive axle center cap, if equipped.
- Insert a drift or large screwdriver through brake caliper into one of the brake rotor vanes in order to prevent drive axle wheel drive shaft from turning.
- Remove nut and washer from hub. Do not reuse nut. A new nut must be used when installing wheel drive shaft.
- Using J 45859 or equivalent, press wheel drive shaft from hub.
- Remove bolts securing wheel drive shaft ...
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STARTER & ALTERNATOR REPLACEMENT PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
Starter, Replace
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
- Disconnect battery ground cable.
- Remove mounting bolts and engine shield, if required.
- Remove mounting bolts and oil pan skid plate, if required.
- Remove righthand transmission cover bolt.
- Remove front axle mounting bracket nut, then position front axle mounting bracket bolt until tip is flush with support bushing. Do not remove bolt.
- Remove mounting bolts and slide starter forward until it clears transmission.
- Disconnect oil level sensor electrical connector.
- Remove start...
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CABIN AIR FILTER LOCATIONS & REPLACEMENT PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
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: 2003 GMC Sierra 1500 HD 6.0 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...
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MAINTENANCE LAMP RESET PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
General Motors Corp./Saturn Trucks -> Check Fuel Cap Lamp ->
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
The Check Fuel Cap Lamp will illuminate momentarily when the ignition switch is placed in the On position as a bulb check. I...
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RADIATOR & HOSE REPLACEMENT PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
Radiator, Replace
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
- Drain radiator coolant into suitable container.
- Remove upper and lower radiator hoses.
- Remove mounting bolts and lower fan shroud.
- Remove engine vent hose and surge take hose.
- Disconnect engine oi...
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SERPENTINE BELT SERVICE PROCEDURES FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
Serpentine Drive Belt, Replace
Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS
- Rotate tensioner clockwise to release belt tension using suitable wrench, then remove belt.
- Route belt over pulleys excep...
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COMPONENT LOCATION DIAGRAMS FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
Component location diagrams for most 2003 GMC Sierra 1500 HD cars and light trucks sold in the U.S. from 1990+.
 Winshield Washer Reservoir Diagram for 2003 GMC Sierra 1500 HD 6.0 V8 GASComponents on diagram: |
 Fuse Block Diagram for 2003 GMC Sierra 1500 HD 6.0 V8 GASComponents on diagram: |
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WIRING DIAGRAMS FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
OEM drawn wiring diagrams for most 2003 GMC Sierra 1500 HD cars and light trucks sold in the U.S.
 2003 GMC Sierra 1500 HD 6.0 V8 GAS Wiring DiagramComponents on diagram: |
 2003 GMC Sierra 1500 HD 6.0 V8 GAS Wiring DiagramComponents on diagram: |
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TECHNICAL SERVICE BULLETINS FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
OEM TSB listings for most 2003 GMC Sierra 1500 HD cars and light trucks sold in the U.S. from 1985+.
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Document: Revised General Motors New Vehicle Tire Warranty Program Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS Auto Systems: |
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Document: Power Folding Mirrors Will Not Fold Inward Vehicle: 2003 GMC Sierra 1500 HD 6.0 V8 GAS Auto Systems: |
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COMPONENT/PARTS SPECIFICATIONS FOR 2003 GMC Sierra 1500 HD AUTOMOBILES
BRAKE SPECIFICATIONS: Brake drum, rotor, caliper, and related specifications for most 2003 GMC Sierra 1500 HD 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 2003 GMC Sierra 1500 HD 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 2003 GMC Sierra 1500 HD 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 2003 GMC Sierra 1500 HD 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
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