GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1836534  Size: SH
  1. Partially drain the cooling system. Refer to Cooling System Draining and Filling.
  2. Remove the heater inlet and outlet pipes. Refer to Heater Inlet Pipe Replacement and Heater Outlet Pipe Replacement.
  3. Remove the thermostat housing bolts (1).
  4. Remove the housing.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1836534  Size: SH
  1. Install the thermostat housing bolts.
  2. Tighten
    Tighten the thermostat housing bolts to 10 N·m (89 lb in).

  3. Install the heater inlet and outlet pipes. Refer to Heater Inlet Pipe Replacement and Heater Outlet Pipe Replacement.
  4. Fill the cooling system. Refer to Cooling System Draining and Filling.