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Automotix DIY provides automotive consumers and do it yourselfers; the most comprehensive repair information about 2003 Chevrolet Express 3500 car and truck
repair procedures including Chevrolet 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 Chevrolet Express 3500 automobile. Try the Automotix DIY solution today!
We have info for following modifications of 2003 Chevrolet Express 3500
- 2003 Chevrolet Express 3500 6.0 V8 GAS, CID:364, Fuel Injection, Aspiration:364, Engine VIN:, Desg:U
- 2003 Chevrolet Express 3500 6.0 V8 CNG, CID:364, Fuel Injection, Aspiration:364, Engine VIN:, Desg:U
A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Express 3500 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 Chevrolet Express 3500 cars and light trucks from 1990+
Electrical Symbol & Wire Color Code Identification -> Electrical Symbol Identification -> Domestic Vehicles
Vehicle: 2003 Chevrolet Express 3500 6.0 V8 CNG
CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Express 3500 A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Express 3500 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 Chevrolet Express 3500 cars and light trucks from 1990+
Electrical Symbol & Wire Color Code Identification -> Wire Color Code Identification -> Domestic Vehicles
Vehicle: 2003 Chevrolet Express 3500 6.0 V8 CNG
CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Express 3500 A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Express 3500 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 Chevrolet Express 3500 cars and light trucks from 1990+
Air Bag System Precautions -> General Motors Corp. -> Arming -> Light Trucks & Vans -> Passenger Cars
Vehicle: 2003 Chevrolet Express 3500 6.0 V8 CNG
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 Chevrolet Express 3500 A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Express 3500 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 Chevrolet Express 3500 cars and light trucks from 1990+
Manual Air Conditioning & Heater System Diagnosis & Testing -> Technical Service Bulletins -> Poor Air Conditioning Performance -- Will Not Blow Cold Enough -> 2003 Sierra & Silverado
Vehicle: 2003 Chevrolet Express 3500 6.0 V8 GAS
2003 Sierra & Silverado
On some of these models equipped with 6.6L diesel engine the air conditioning performance is less than desirable, especially when ambient temperature is more than 90°F.
To correct this condition perform system inspects as follow:
- Calibrate actuators
- Inspect lower condenser deflector for proper installation. Deflector should be positioned at lower part of condenser and extend forward into top of front bumper and below two fresh air intake holes.
- Inspect engine coo...
CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Express 3500 A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Express 3500 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 Chevrolet Express 3500 cars and light trucks from 1990+
Component Replacement & Adjustment -> Express & Savana -> Heater Core, Replace -> Front -> Rear
Vehicle: 2003 Chevrolet Express 3500 6.0 V8 GAS
Front
- Drain engine coolant into suitable container.
- Disconnect clamps, then remove heater core inlet and outlet hoses.
- Remove case mounting screws and open heater core access door.
- Cut marked section of heater core access door.
- Remove mounting screws and heater core.
- Reverse procedure to install, noting the following:
- Torque heater core mo...
CLICK HERE TO GET FULL ACCESS TO 2003 Chevrolet Express 3500 A/C & HEATER SERVICE PROCEDURES
A/C & HEATER SERVICE PROCEDURES FOR 2003 Chevrolet Express 3500 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 Chevrolet Express 3500 cars and light trucks from 1990+
General Service Domestic Vehicles -> 2003-04 -> Leak Test -> Electronic Leak Detectors -> Fluid Leak Detectors
Vehicle: 2003 Chevrolet Express 3500 6.0 V8 GAS
Testing the refrigerant system for leaks is one of the most important phases of troubleshooting. One or more of the methods outlined will prove useful in detecting leaks or checking connections if service work is performed. Before beginning any leak test, attach a manifold gauge set and note pressure. If little or no pressure is indicated, a partial charge must be installed. Check all connections, compressor head gasket, oil filler plug and compressor shaft seal for leaks.
For R-134a system an electronic type leak detector is recommended.
Electronic Leak Detectors
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