Sierra 1500 4WD V8-6.0L VIN U (2006)
1. Remove the encoder motor.
2. Place the encoder motor on a clean work bench,
3. Remove the 2 screws (2) from the motor cover.
4. Remove the 2 screws (1) from the casting.
5. Remove the cover.
6. Remove and save the shim on the output gear.
7. Remove and discard the orange rubber seal from the cover.
8. Remove the output gear (1).