Sierra 1500 4WD V8-4.8L (2007)
Fluid Pressure Sensor/Switch: Service and Repair
Allison - Automatic Transmission
Pressure Switch Manifold Replacement
Removal Procedure
Important: Individual pressure switches cannot be replaced. When any pressure switch needs replacing, the entire assembly must be
replaced.
Important: The modulated main pressure (MAIN MOD) solenoid has been removed for clarity.
1. Remove the oil pan and transmission internal oil filter.
Caution: Refer to Battery Disconnect Caution.
2. Disconnect the internal wiring harness connector from the transmission fluid pressure (TFP) switch (2).
3. Remove six bolts (1). Remove the TFP switch (2).
Installation Procedure