GM Service Manual Online
For 1990-2009 cars only

Tools Required

J 38185 Hose Clamp Pliers

Removal Procedure


    Object Number: 1664571  Size: SH
  1. Remove the air cleaner. Refer to Air Cleaner Assembly Replacement .
  2. Drain the cooling system. Refer to Cooling System Draining and Filling .
  3. Using the J 38185 , reposition the radiator outlet hose clamp (1) at the thermostat housing.
  4. Remove the radiator outlet hose (2) from the thermostat housing.

  5. Object Number: 611039  Size: SH
  6. Remove the thermostat housing bolts.

  7. Object Number: 611035  Size: SH
  8. Remove the thermostat housing, thermostat, and gasket from the water pump housing.
  9. Discard the old thermostat housing gasket.

Installation Procedure


    Object Number: 611035  Size: SH
  1. Install a NEW thermostat housing gasket into the water pump housing.
  2. Install the thermostat into the water pump housing.
  3. Install the thermostat housing.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 611039  Size: SH
  5. Install the thermostat housing bolts.
  6. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1664571  Size: SH
  7. Install the radiator outlet hose (2) to the thermostat housing.
  8. Using the J 38185 , position the radiator outlet hose clamp (1) at the thermostat housing.
  9. Fill the cooling system. Refer to Cooling System Draining and Filling .
  10. Install the air cleaner. Refer to Air Cleaner Assembly Replacement .