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 MANUALSCHEVROLET1985G 30 VAN V8-379 6.2L DSLREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIR
1985 Chevrolet G 30 Van V8-379 6.2L DSL
Engine Control Module: Service and Repair
1985 Chevrolet G 30 Van V8-379 6.2L DSLSECTION Service and Repair
When replacing production ECM, transfer Production Broadcast Code and Production ECM labels to the service controller label.
1. Disconnect battery ground cable.
2. Remove ECM mounting hardware and disconnect electrical connectors.
3. Remove ECM from under instrument panel on all 1988 models and 1984-85 C and K Series. On 1984-85 G and P Series, remove ECM from under driver's seat.
4. Reverse procedure to install. Replacement ECMs are not supplied with a PROM. If PROM is to be reused, care must be taken when removing from damaged ECM, refer to PROM, Replace procedure.
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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.