GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 281933  Size: SH
  1. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Disconnect the engine left coolant heater cord (4) at the engine left coolant heater.

  3. Object Number: 281929  Size: SH
  4. Remove the engine left coolant heater bolt.
  5. Remove the engine left coolant heater.

Installation Procedure

Important: Align the threaded hole in the engine block with the hole labeled L (2) on the engine left coolant heater.


    Object Number: 281914  Size: SH
  1. Install the engine left coolant heater.

  2. Object Number: 281929  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the engine left coolant heater bolt.
  4. Tighten
    Tighten the coolant heater bolt to 9 N·m (80 lb in).


    Object Number: 281933  Size: SH

    Notice: The heater cord must not touch the engine, hot pipes, manifold, or any moving parts. Route the cord to the left front of the engine compartment securing with tie straps as necessary to prevent damage.

  5. Connect the engine left coolant heater cord (4) to the engine left coolant heater.
  6. Lower the vehicle.