GM Service Manual Online
For 1990-2009 cars only

    Object Number: 287881  Size: SH
  1. Remove the four oil pump assembly bolts identified by the larger head size.
  2. Slide the oil pump assembly off the nose of the crankshaft with the drive sprocket in place.

  3. Object Number: 235168  Size: SH
  4. Remove the crankshaft sprocket from the oil pump assembly.
  5. Wrap the oil pump in a towel for safe, clean storage until inspection or assembly is necessary.