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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1989G 30 VAN V8-305 5.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULESERVICE AND REPAIR
1989 Chevrolet G 30 Van V8-305 5.0L
Engine Control Module: Service and Repair
1989 Chevrolet G 30 Van V8-305 5.0LSECTION Service and Repair
Control Module Mounting:
CAUTION:
[a] The ignition must be "OFF," when disconnecting or reconnecting the control module connector, to prevent internal damage to the control module.
[b] To prevent possible Electrostatic Discharge to the control module, DO NOT touch the connector pins or soldered components on the circuit boards.
NOTE: When replacing a production control module with a service controller, transfer the broadcast DTC and production control module part number to the controller label. DO NOT record information on the access cover.
REMOVAL:
1. Disconnect the negative battery terminal.
2. Remove control module mounting bracket under drivers seat. Lift and twist to remove from under seat.
3. Disconnect control module harness connectors.
4. Remove brackets and modules, if equipped.
5. Remove access cover and PROM (MEM-CAL).
INSTALLATION:
1. Install PROM (MEM-CAL) and access cover on to new control module.
2. Install mounting brackets and module(s).
3. Connect control module harness connectors.
4. Install control module and bracket under driver seat.
5. Connect the negative battery terminal.
6. Perform functional check.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.