GM Service Manual Online
For 1990-2009 cars only

    Object Number: 452375  Size: SH
  1. Using a hex wrench, loosen the oil filter fitting.

  2. Object Number: 471026  Size: SH
  3. Remove the oil filter fitting.
  4. Inspect the oil filter fitting.
  5. Replace the oil filter fitting, if necessary.

  6. Object Number: 471143  Size: SH
  7. Remove the oil bypass valves, if required. Unstake the tangs on the oil bypass valves and remove with long nose pliers.
  8. Discard the oil bypass valves, if removed.