GM Service Manual Online
For 1990-2009 cars only

    Object Number: 1412155  Size: SH
  1. Install a NEW gasket onto the thermostat housing.

  2. Object Number: 1412152  Size: SH
  3. Install the thermostat housing.
  4. Notice: Refer to Fastener Notice in the Preface section.

  5. Install the thermostat housing bolts.
  6. Tighten
    Tighten the thermostat housing bolts to 10 N·m (89 lb in).


    Object Number: 1412151  Size: SH
  7. Install a NEW gasket and O-ring onto the heater inlet/outlet pipe assembly.

  8. Object Number: 1412150  Size: SH
  9. Install the heater inlet/outlet pipe assembly.
  10. Install the heater inlet/outlet pipe assembly bolts.
  11. Tighten
    Tighten the heater inlet/outlet pipe assembly bolts to 10 N·m (89 lb in).