GM Service Manual Online
For 1990-2009 cars only

Engine Coolant Thermostat Replacement 3.8 L

Removal Procedure


    Object Number: 349798  Size: SH
  1. Remove the water outlet (2). Refer to Engine Coolant Thermostat Housing Replacement .
  2. Remove the engine coolant thermostat (3).

Installation Procedure


    Object Number: 349798  Size: SH
  1. Install the engine coolant thermostat (3).
  2. Install the water outlet (2). Refer to Engine Coolant Thermostat Housing Replacement .

Engine Coolant Thermostat Replacement 5.7 L

Removal Procedure


    Object Number: 221709  Size: SH
  1. Remove the water outlet. Refer to Engine Coolant Thermostat Housing Replacement .
  2. Remove the thermostat.

Installation Procedure


    Object Number: 221709  Size: SH
  1. Install the thermostat.
  2. Install the water outlet. Refer to Engine Coolant Thermostat Housing Replacement .