GM Service Manual Online
For 1990-2009 cars only

    Object Number: 173183  Size: SH
  1. Remove the bolt that attaches the oil pump to the rear crankshaft bearing cap.
  2. Remove the oil pump, driveshaft, and retainer from the rear crankshaft bearing cap.
  3. Separate the oil pump, driveshaft, and retainer.
  4. Discard the driveshaft retainer.