GM Service Manual Online
For 1990-2009 cars only

    Object Number: 187015  Size: SH
  1. Remove the oil filter bypass hole plug.
  2. Important: Do not remove the oil filter fitting unless replacement or repair is needed.

  3. Remove the oil filter fitting, if necessary.
  4. Important: Do not pry against the threads in oil filter bypass hole when removing the bypass valve.

  5. Remove the oil filter bypass valve, by prying out with a suitable tool.