GM Service Manual Online
For 1990-2009 cars only

Engine Coolant Thermostat Housing Removal LY7


    Object Number: 1412150  Size: SH
  1. Remove the heater inlet/outlet pipe assembly bolts.
  2. Remove the heater inlet/outlet pipe assembly.

  3. Object Number: 1412151  Size: SH
  4. Remove and discard the heater inlet/outlet pipe gasket and O-ring.

  5. Object Number: 1412152  Size: SH
  6. Remove the thermostat housing bolts.
  7. Remove the thermostat housing.

  8. Object Number: 1412155  Size: SH
  9. Remove and discard the thermostat housing gasket.

Engine Coolant Thermostat Housing Removal LCS


    Object Number: 2137824  Size: SH
  1. Remove the thermostat housing bolts (1, 2).
  2. Remove the thermostat housing (3).

  3. Object Number: 2137827  Size: SH
  4. Remove and discard the thermostat housing gasket (1).