GM Service Manual Online
For 1990-2009 cars only

Tools Required:

J 21426 Rear Extension Seal Installer

Removal Procedure

  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  2. Remove the propeller shaft. Refer to Rear Propeller Shaft Replacement in Propeller Shaft .

  3. Object Number: 408509  Size: SH
  4. Remove the rear extension oil seal.

Installation Procedure


    Object Number: 408511  Size: SH
  1. Install the new seal usingJ 21426 .
  2. Install the propeller shaft. Refer to Rear Propeller Shaft Replacement in Propeller Shaft .
  3. Lower the vehicle.
  4. Check the transmission fluid level.
  5. Use Dexron® III Automatic Transmission Fluid.