GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 Kodiak C-Series (Conventional) C4/C5 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 Powertrain Control Module Replacement

Caution: 

   • Turn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage.
   • Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables, or when charging the vehicle battery.
   • In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board.
   • Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module.
   • The replacement control module must be programmed.

Note: 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 percent. 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.

Removal Procedure
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
  2. Open the hood.
  3. Disconnect the battery. Refer to Battery Negative Cable Disconnection and Connection.

    4. Object Number: 910597 Size: SH
  4. Remove accumulator bottle bracket retaining nuts and position bottle with bracket out of the way.
  5. Disconnect wiring harness connectors.

    6. Object Number: 808153 Size: SH
  6. Remove the 2 multi-use bracket tray bolts and multi-use bracket tray.
  7. Remove the 3 powertrain control module retainer nuts and the power train control module from the multi-use bracket tray.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.

  1. Install the powertrain control module retainer to the multi-use bracket tray with 3 nuts.

    2. Tighten
    Tighten the nuts to 9 N·m (80 lb in).


    Object Number: 808153 Size: SH
  2. Position the multi-use bracket tray in the multi-use bracket and secure with tray nuts.

    3. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  3. Connect the electrical wiring harness to the powertrain control module.
  4. Reposition the accumulator bottle in the accumulator bottle bracket.

    5. Object Number: 910597 Size: SH
  5. Install the accumulator bottle with bracket to the multiuse bracket with 2 accumulator bottle bracket nuts.

    6. Tighten
    Tighten the nuts to 9 N·m (80 lb in).

  6. Connect the battery. Refer to Battery Negative Cable Disconnection and Connection.
  7. If a new PCM was installed, program the PCM. Refer to Control Module References.