GM Service Manual Online
For 1990-2009 cars only
  1. Remove the coolant pump drive pulley and bolts.

  2. Object Number: 3330  Size: SH
  3. Remove the coolant pump attaching bolts.
  4. Remove the coolant pump.

  5. Object Number: 3329  Size: SH
  6. Remove the coolant pump gasket.
  7. • Clean all sealing surfaces
    • Inspect all sealing surfaces for burrs or imperfections