GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1801537  Size: SH
  1. Loosen the clamp and disconnect the heater upper hose.
  2. Loosen the clamp and disconnect the water hose to surge tank.

  3. Object Number: 1826331  Size: SH
  4. Remove the water outlet port (1) from the cylinder block.
  5. Remove water outlet port to cylinder block gasket (2) and discard.

Installation Procedure


    Object Number: 1826331  Size: SH
  1. Install a new water outlet port to cylinder block gasket (2).
  2. Caution: Refer to Fastener Caution in the Preface section.

  3. Install the water outlet port (1) to the cylinder block.
  4. Tighten
    Tighten the water outlet port attaching bolt to 10 N·m (89 lb in).


    Object Number: 1801537  Size: SH
  5. Connect the heater upper hose to the water outlet port and secure the clamp.
  6. Connect the water hose to surge tank to the water outlet port and secure the clamp.