GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

  1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

  2. Object Number: 866186  Size: SH

    Important: Transmission fluid may leak from the test hole when the plug is removed.

  3. Remove the transmission oil pressure test plug.
  4. Clean and inspect the test hole for dirt or debris.

Installation Procedure


    Object Number: 866186  Size: SH
  1. Inspect the transmission oil pressure test plug for damage. Replace if necessary.
  2. Notice: Refer to Fastener Notice in the Preface section.

  3. Install the transmission oil pressure test plug.
  4. Tighten
    Tighten the plug to 9 N·m (80 lb in).

    Important: A new lower tube assembly drain plug will be required when checking the transmission fluid level.

  5. Verify the transmission fluid level. Refer to Transmission Fluid Replacement .