GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 755428  Size: SH
  1. If equipped with a 4.2L engine, remove the powertrain control module (PCM).
  2. Remove the coolant heater cord from the engine harness bracket (1).
  3. Remove the coolant heater cord from the coolant heater (2).

  4. Object Number: 898845  Size: SH
  5. If equipped with a 5.3L or 6.0L engine, disconnect the coolant heater cord from the coolant heater (1).
  6. Remove the coolant heater cord clip from the engine harness.

  7. Object Number: 755434  Size: SH
  8. Disconnect the coolant heater cord retainers (1) from the battery cover.

Installation Procedure


    Object Number: 755434  Size: SH
  1. Connect the coolant heater cord retainers (1) to the battery cover.

  2. Object Number: 898845  Size: SH
  3. If equipped with a 5.3L or 6.0L engine, connect the coolant heater cord to the coolant heater (1).
  4. Install the coolant heater cord clip to the engine harness.

  5. Object Number: 755428  Size: SH
  6. If equipped with a 4.2L engine, install the coolant heater cord to the coolant heater (2).
  7. Install the coolant heater cord to the engine harness bracket (1).
  8. Install the PCM.