GM Service Manual Online
For 1990-2009 cars only

    Object Number: 15889  Size: SH

    Notice: Do not damage the case bore during removal of the manual shift shaft seal.

  1. Using a small flat blade screwdriver, remove the manual shaft seal assembly (113).

  2. Object Number: 15890  Size: SH
  3. Using a small flat blade screwdriver, remove the transmission oil filter seal (32).

  4. Object Number: 409453  Size: SH
  5. Use a drift punch and hammer in order to drive the seal (120) through the case.