GM Service Manual Online
For 1990-2009 cars only

    Object Number: 4548  Size: SH
  1. Remove the bolt that attaches the oil pump to the rear crankshaft bearing cap.

  2. Object Number: 4549  Size: SH
  3. Remove the oil pump driveshaft and the retainer.
  4. Separate the oil pump, driveshaft, and retainer.
  5. Discard the retainer.