GM Service Manual Online
For 1990-2009 cars only

    Object Number: 427935  Size: SH

    Important: The oil pump pipe has a press fit into the oil pump. DO NOT remove the pipe from the oil pump. The pipe and oil pump are serviced as a complete assembly.

  1. Remove the oil pump driveshaft and retainer.

  2. Object Number: 678105  Size: SH
  3. Remove the oil pump cover bolts.

  4. Object Number: 678106  Size: SH
  5. Remove the pump cover.

  6. Object Number: 678107  Size: SH
  7. Remove the drive gear and the driven gear. Matchmark the gear teeth for assembly.

  8. Object Number: 427947  Size: SH
  9. Remove the following items:
  10. 5.1. The retaining pin
    5.2. The pressure relief valve spring
    5.3. The pressure relief valve