GM Service Manual Online
For 1990-2009 cars only

    Object Number: 33597  Size: SH
  1. Remove the air bleed pipe retaining bolt and nut.
  2. Remove the air bleed pipe.

  3. Object Number: 33598  Size: SH
  4. Remove the outlet to the cylinder head bolts.
  5. Remove the outlet from the head.
  6. Important: The thermostat is located at the coolant pump. The O-ring seal is reusable. Replace any damaged O-ring.