GM Service Manual Online
For 1990-2009 cars only

    Object Number: 896494  Size: SH
  1. Install the thermostat housing with the thermostat to the engine.
  2. Apply the thread sealant PST 565 to the bolt threads.
  3. Notice: Refer to Fastener Notice in the Preface section.

  4. Install the thermostat housing bolts.
  5. Tighten
    Tighten the thermostat housing bolts to 20 N·m (15 lb ft).


    Object Number: 894721  Size: SH
  6. Use the new seals when installing the thermostat housing extension.
  7. Coat the new seals with the engine coolant to assist in the installation.
  8. Push the coolant extension housing into the thermostat housing.

  9. Object Number: 896498  Size: SH
  10. Install the coolant extension housing bolt.
  11. Tighten
    Tighten the coolant extension housing bolt to 20 N·m (15 lb ft).