Removal Procedure

NOTE: In order to prevent internal damage to the PCM, the ignition must be OFF when disconnecting or reconnecting the PCM connector.

Service should normally consist of either replacement of the PCM or electronically erasable programmable read only memory (EEPROM) re-programming.

If the diagnostic procedures call for the PCM to be replaced, the PCM should be inspected first in order to verify the PCM is the correct part. DTC P0602 indicates the EEPROM programming has malfunctioned. When DTC P0602 is set, re-program the EEPROM.

Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical.
Remove the left closeout/insulator panel. Refer to Closeout/Insulator Panel Replacement - Left in Instrument Panel, Gages, and Console.

Fig 1: Locking Tab & Release Lever

Courtesy of GENERAL MOTORS CORP.

NOTE: Do not touch the PCM connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage. Do not remove the integrated circuit boards from the carrier.

Push down on the locking tab (1) and pull up on the release lever (2) and disconnect the PCM harness connectors.

Fig 2: PCM & PCM Bracket

Courtesy of GENERAL MOTORS CORP.

Depress the PCM retaining tab (1).
Slide the PCM up and out from the PCM bracket.