Powertrain Control Module - Installation

INSTALLATION

CAUTION: Certain ABS systems rely on having the Powertrain Control Module (PCM) broadcast the Vehicle Identification Number (VIN) over the bus network. To prevent problems of DTCs and other items related to the VIN broadcast, it is recommend that you disconnect the ABS CAB (controller) temporarily when replacing the PCM. Once the PCM is replaced, write the VIN to the PCM using a scan tool. This is done from the engine main menu. Arrow over to the second page to "1. Miscellaneous". Select "Check VIN" from the choices. Make sure it has the correct VIN entered before continuing. When the VIN is complete, turn off the ignition key and reconnect the ABS module connector. This will prevent the setting of DTCs and other items associated with the lack of a VIN detected when you turn the key ON after replacing the PCM.

CAUTION: Use the scan tool to reprogram the new PCM with the vehicles original identification number (VIN) and the vehicles original mileage. If this step is not done, a Diagnostic Trouble Code (DTC) may be set.





1. Install the PCM (2) and 4 mounting bolts to vehicle.
2. Check pin connectors in the PCM and the three 32-way connectors (four 38-way connectors if equipped with NGC) for corrosion or damage. Also, the pin heights in connectors should all be same. Repair as necessary before installing connectors.
3. Install the three 32-way connectors (four 38-way connectors if equipped with NGC).
4. The 5.7L V-8 engine is equipped with a fully electronic accelerator pedal position sensor. If equipped with a 5.7L, also perform the following 3 steps:
a. Connect the negative battery cable.
b. Turn the ignition switch ON, but do not crank the engine.
c. Leave the ignition switch ON for a minimum of 10 seconds. This will allow the PCM to learn the electrical parameters.
d. The scan tool may also be used to learn electrical parameters. Go to the Miscellaneous menu, and then select ETC Learn.
5. If the previous step is not performed, a Diagnostic Trouble Code (DTC) will be set.
6. If necessary, use a scan tool to erase any Diagnostic Trouble Codes (DTC's) from PCM. Also use the scan tool to reprogram new PCM with vehicles original Vehicle Identification Number (VIN) and original vehicle mileage.