Sierra 2500 Denali 2WD V8-6.0L (2011)
1. Remove the oil pan and the transmission internal oil filter. Refer to Oil Pan Replacement (See: Fluid Pan/Service and Repair/Allison - Automatic
Transmission).
2. Disconnect the internal wiring harness from the solenoid being changed.
3. Remove the solenoid retainer (2) for shift solenoid 1 (SS1) (5). Note the position of the solenoid connector and pull the solenoid (5) out of the
bore in the control valve assembly (1). The O-rings (3 and 4) provide the resistance felt during removal.
