Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2000CHEVY EXPRESS G3500, VAN PASSENGER, 7.4 JREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - SYSTEM & COMPONENT TESTSCOMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULE CONNECTOR TERMINAL IDENTIFICATIONNOTES
2000 Chevrolet Chevy Express G3500, Van Passenger, 7.4 J
Powertrain Control Module Connector Terminal Identification: Notes
2000 Chevrolet Chevy Express G3500, Van Passenger, 7.4 JSECTION Notes
NOTE:
Three types of engine control modules are available and are used according to engine configuration. All 2.2L (VIN 4), 3.4L, 4.8L, 5.3L, 6.0L and 6.5L vehicles are equipped with a Powertrain Control Module (PCM). All 4.3L, 5.0L, 5.7L (gasoline) and 7.4L vehicles are equipped with a Vehicle Control Module (VCM). Vehicles equipped with 5.7L flex-fuel (gasoline and CNG) engines use both PCM and an Alternative Fuel Engine Control Unit (AF ECU). The AF ECU controls CNG operation, PCM controls gasoline operation.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.