GM Service Manual Online
For 1990-2009 cars only

Engine Coolant Thermostat Replacement 3.6L Engine

Removal Procedure

  1. Remove the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement .

  2. Object Number: 1949784  Size: SH
  3. Place thermostat housing in a soft jaw vice.
  4. Caution: Refer to Safety Glasses Caution in the Preface section.

  5. While depressing the thermostat (3) rotate the retaining bar (2) anti-clockwise in the housing (1) until it clears the retaining lugs (4).
  6. Carefully release the thermostat spring force.
  7. Remove the thermostat from it's housing.

Installation Procedure

  1. Ensure that the thermostat housing in clean and free of damage.

  2. Object Number: 1949786  Size: SH
  3. While pressing the thermostat (3) rotate the retaining bar (2) clockwise in the housing (1) until it locks into the retaining lugs (4).
  4. Install the thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement .