Sierra 2500 Denali 2WD V8-6.0L (2011)
Shift Solenoid: Service and Repair
Allison - Automatic Transmission
Control Valve Solenoid Replacement (PCS1 and PCS2)
Control Valve Solenoid Replacement (PCS1 and PCS2)
Removal Procedure
1. Remove the oil pan and transmission internal oil filter. Refer to Oil Pan Replacement (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Fluid Pan/Service and Repair/Allison - Automatic Transmission).
2. Disconnect the internal wiring harness from the solenoid being changed.
3. Remove the 2 bolts that fasten reverse signal pipe (1) to the control valve assembly. Remove the reverse signal pipe.
