GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise the hood. Support the hood.
  2. 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.

  3. Disconnect the negative battery cable. Refer to Battery Replacement in Engine Electrical.

  4. Object Number: 229943  Size: SH
  5. Disconnect the electrical connections.
  6. Remove the screw.

  7. Object Number: 229944  Size: SH
  8. Remove the thermostat.

Installation Procedure


    Object Number: 229944  Size: SH
  1. Install the thermostat.
  2. Install the screw.

  3. Object Number: 229943  Size: SH
  4. Connect the electrical connections.
  5. Connect the negative battery cable. Refer to Battery Replacement in Engine Electrical.
  6. Close the hood.