GM Service Manual Online
For 1990-2009 cars only

Engine Control Module Replacement/Restore Fuel Rate Data Without CTF

Removal Procedure

Notice: Do not touch the connector pins or soldered components on the circuit board in order to prevent possible electrostatic discharge (ESD) damage to the PCM.

Important: Do not substitute a powertrain control module (PCM) from another vehicle for diagnosis.

Important: The ignition should always be OFF when installing or removing the PCM connectors.

    Important: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.

  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Remove the I/P extension trim plate. Refer to Instrument Panel Extension Trim Plate Replacement in Instrument Panel, Gages, and Console.

  3. Object Number: 819675  Size: SH
  4. Remove the powertrain control module (PCM) from the instrument panel carrier.

Installation Procedure


    Object Number: 819677  Size: SH
  1. Install the PCM to the instrument panel carrier with 4 integral fasteners.
  2. Install the I/P extension trim plate. Refer to Instrument Panel Extension Trim Plate Replacement in Instrument Panel, Gages, and Console.
  3. Program the electrically erasable programmable read only memory (EEPROM) if a new PCM is being installed. Refer to Service Programming System (SPS) in Programming.