Sierra 1500 4WD V8-6.0L VIN U (2006)
Seals and Gaskets: Service and Repair
Allison - Automatic Transmission
Filler Tube and Seal Replacement
Filler Tube and Seal Replacement
Removal Procedure
1. The transmission case has provisions that enable the fill tube to be installed on either the right or left side of the transmission. Proceed to step 9 if
servicing the plug and/or seal opposite the fill tube.
2. If the vehicle is equipped with a diesel engine, the transmission must be removed to service the fill tube and/or seal.
3. Remove the transmission fluid level indicator.
4. Raise and suitably support the vehicle. Refer to Lifting and Jacking the Vehicle.
5. Remove the fill tube nuts.
6. Place a drain pan under the transmission to catch any dripping fluid.
7. Loosen the fill tube from the transmission.
8. Remove the fill tube and seal from the vehicle.
9. Remove the fill tube plug (1).
10. Remove the fill tube plug seal (2).
Installation Procedure
1. Install a new fill tube plug seal (2) into the main housing.
