GM Service Manual Online
For 1990-2009 cars only
  1. Inspect the water pump.
  2. Note: 

       • Ensure that the engine block surface and water pump surface are clear of old gasket material.
       • Do not immerse the water pump in solvent. The solvent may enter the water pump's permanently lubricated bearings and cause premature bearing failure.

  3. Rotate the water pump drive pulley.
  4. Note: The water pump drive pulley and impeller should turn straight and smoothly. If the drive pulley wobbles, is noisy, or feels rough when rotating, replace the water pump.


    Object Number: 2027548  Size: SH
  5. Install a NEW water pump gasket. (2).
  6. Install the water pump (1).
  7. Caution: Refer to Fastener Caution in the Preface section.

  8. Install the 5 water pump bolts (3) and tighten to  11 N·m (97 lb in) .