GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Malibu 🢒 Body and Accessories 🢒 Wiring Systems 🢒 Powertrain Control Module Replacement

Removal Procedure

Notice: 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 powertrain control module (PCM) or electrically 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.

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Remove the left hush panel.

    3. Object Number: 72295 Size: SH
  3. Loosen the PCM connector screws (1).

    4. Object Number: 102470 Size: SH

    Notice: 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.

  4. Disconnect the PCM electrical connectors.
  5. Depress the PCM retaining tabs.
  6. Slide the PCM from the PCM bracket.

Installation Procedure

Remove the new PCM from the packaging and inspect the service number to verify the number is the same number, or an updated number, as the faulty PCM.

  1. Slide the PCM into the PCM bracket.

    2. Notice: 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.


    Object Number: 102470 Size: SH
  2. Install the PCM electrical connectors.

    3. Object Number: 72295 Size: SH
  3. Tighten the PCM connector screws (1).
  4. Install the left hush panel.
  5. Connect the negative battery cable.

    6. Important: : The replacement PCM must be reprogrammed and the crankshaft position (CKP) system variation learn procedure must be performed.

  6. Program the PCM. Refer to Service Programming System (SPS) in Programming.
  7. The replacement PCM will NOT allow secondary air injection (AIR) pump operation until a total of 16 km (10 mi) have accumulated.