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.
2002 Chevrolet Express 3/4 Ton Van V8-6.5L DSL Turbo VIN FFACTORY OEM SERVICE PROCEDURE
Powertrain Control Module (PCM) Replacement
If the diagnostic procedures call for the powertrain control module (PCM) to be replaced, then programming the EEPROM in the PCM will be necessary. Use the procedure.
Removal Procedure
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cables.
2. Remove the engine cover.
3. Disconnect the harness connectors from the powertrain control module (PCM).
4. Remove the PCM mounting nuts.
5. Remove the PCM from the mounting bracket.
IMPORTANT: To prevent possible electrostatic discharge to the PCM, do not touch the component leads, and do not remove the integrated circuit from the carrier.
6. Remove the PCM mounting hardware.
Installation Procedure
1. Install the PCM mounting hardware.
2. Slide the PCM into the mounting bracket.
3. Install the PCM mounting nuts.
IMPORTANT: Ensure that the PCM electrical harness is properly routed to avoid contact with the engine cover during installation.
4. Reconnect the PCM harness connectors.
5. Install the engine cover.
6. Connect the negative battery cables.
The MIL, the antilock and the brake lamps will continue to be enabled until the PCM is programmed. Once the programming is complete, the lamps will be turned OFF and normal operation will occur. Programming and Relearning
Removal Procedure
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cables.
2. Remove the engine cover.
3. Disconnect the harness connectors from the powertrain control module (PCM).
4. Remove the PCM mounting nuts.
5. Remove the PCM from the mounting bracket.
IMPORTANT: To prevent possible electrostatic discharge to the PCM, do not touch the component leads, and do not remove the integrated circuit from the carrier.
6. Remove the PCM mounting hardware.
Installation Procedure
1. Install the PCM mounting hardware.
2. Slide the PCM into the mounting bracket.
3. Install the PCM mounting nuts.
IMPORTANT: Ensure that the PCM electrical harness is properly routed to avoid contact with the engine cover during installation.
4. Reconnect the PCM harness connectors.
5. Install the engine cover.
6. Connect the negative battery cables.
The MIL, the antilock and the brake lamps will continue to be enabled until the PCM is programmed. Once the programming is complete, the lamps will be turned OFF and normal operation will occur. Programming and Relearning
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.