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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 GMC Sierra 2500 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 2003 GMC Sierra 2500 HD automobile. Try the Automotix DIY solution today!
We have info for following modifications of 2003 GMC Sierra 2500 HD
- 2003 GMC Sierra 2500 HD 6.0 V8 GAS, CID:364, Fuel Injection, Aspiration:364, Engine VIN:, Desg:U
- 2003 GMC Sierra 2500 HD 8.1 V8 GAS, CID:496, Fuel Injection, Aspiration:496, Engine VIN:, Desg:G
- 2003 GMC Sierra 2500 HD 6.6 V8 DIESEL, CID:400, Fuel Injection, Aspiration:400, Engine VIN:, Desg:1
- 2003 GMC Sierra 2500 HD 6.0 V8 CNG, CID:364, Fuel Injection, Aspiration:364, Engine VIN:, Desg:U
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 2500 HD 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 2003 GMC Sierra 2500 HD cars and light trucks from 1990+
Air Bag System Precautions -> General Motors Corp. -> Arming -> Light Trucks & Vans -> Passenger Cars
Vehicle: 2003 GMC Sierra 2500 HD 6.6 V8 DIESEL
Passenger Cars
Reverse disarming procedures to arm the Supplemental Restraint System, noting the following:
- Ensure all disconnected SRS electrical connectors are securely connected and routed.
- Install all removed fuses in proper locations.
- From a safe position at sides of or below air bag module, Turn ignition switch to ON position and observe Air Bag or SRS warning lamp.
- On all models except Prizm and 1990 Corvette, warning lamp should flash seven to nine times, then go off.
- On Prizm models, warning lamp should light for six seconds,...
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Sierra 2500 HD A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 2500 HD 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 2003 GMC Sierra 2500 HD cars and light trucks from 1990+
Air Bag System Precautions -> General Motors Corp. -> Arming -> Light Trucks & Vans -> Passenger Cars
Vehicle: 2003 GMC Sierra 2500 HD 6.0 V8 GAS
Passenger Cars
Reverse disarming procedures to arm the Supplemental Restraint System, noting the following:
- Ensure all disconnected SRS electrical connectors are securely connected and routed.
- Install all removed fuses in proper locations.
- From a safe position at sides of or below air bag module, Turn ignition switch to ON position and observe Air Bag or SRS warning lamp.
- On all models except Prizm and 1990 Corvette, warning lamp should flash seven to nine times, then go off.
- On Prizm models, warning lamp should light for six seconds,...
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Sierra 2500 HD A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 2500 HD 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 2003 GMC Sierra 2500 HD cars and light trucks from 1990+
Compressor Service -> Denso Compressor -> Clutch & Coil, Replace
Vehicle: 2003 GMC Sierra 2500 HD 6.6 V8 DIESEL
- Raise and suitably support vehicle.
- Remove engine protection shield.
- Relieve tension by rotating tensioner clockwise and remove drive belt, Fig. .
- Remove mo...
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Sierra 2500 HD A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 2500 HD 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 2003 GMC Sierra 2500 HD cars and light trucks from 1990+
General Service Domestic Vehicles -> 2003-04 -> Precautions -> A/C Refrigerant Oil -> Battery Ground Cable -> Cleanliness -> Engine Coolant -> Exercise System -> General Service -> Product Compatibility -> R-134a -> Safety
Vehicle: 2003 GMC Sierra 2500 HD 6.6 V8 DIESEL
Battery Ground Cable
Prior to service disconnect battery ground cable and isolate as required.
Product Compatibility
A/C Refrigerant Oil
Before replenishing refrigerant oil, ensure product compatibility with the system being serviced. Refer to "A/C Data," for specifications.
Engine Coolant
Before adding or replacing engine coolant, ensure product compatibility with the system being serviced. If using orange silicate-free coolant, do not mix with green silicated coolant. If mixed, premature engine, heater core or radiator corrosion may result.
...CLICK HERE TO GET FULL ACCESS TO 2003 GMC Sierra 2500 HD A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 2500 HD 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 2003 GMC Sierra 2500 HD cars and light trucks from 1990+
Manual Air Conditioning & Heater System Diagnosis & Testing -> Sierra & Silverado -> Precautions -> Air Bag System Disarming & Arming -> Battery Ground Cable
Vehicle: 2003 GMC Sierra 2500 HD 6.6 V8 DIESEL
Air Bag System Disarming & Arming
Refer to and for air bag system disarming and arming proced...
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Sierra 2500 HD A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 GMC Sierra 2500 HD 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 2003 GMC Sierra 2500 HD cars and light trucks from 1990+
Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Domestic Vehicles
Vehicle: 2003 GMC Sierra 2500 HD 6.6 V8 DIESEL
CLICK HERE TO GET FULL ACCESS TO 2003 GMC Sierra 2500 HD A/C & HEATER SERVICE PROCEDURES
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