Rear Differential Hydraulic System Service Fill/Bleed Procedure
WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
The rear differential hydraulic system service bleed is used to remove air from the system, check for proper system and solenoid function, and determine if full pressure can be achieved at the apply piston. Any time a rear differential hydraulic line is disconnected or any repairs are made, this procedure must be performed.
- Connect scan tool and check the rear differential clutch control module for any DTCs and perform repairs as necessary. The scan tool may not allow the hydraulic system service bleed if certain DTCs are present.
- Raise vehicle. Refer to Lifting and Jacking the Vehicle .
- Remove the fill plug. Fill the Rear Drive Clutch fill hole to the appropriate level with the appropriate fluid. Refer to Differential Clutch Oil Replacement , Approximate Fluid Capacities , and Adhesives, Fluids, Lubricants, and Sealers .
- Install fill plug. Lower vehicle.
- Ignition ON.
- From the scan tool menu, select Rear Differential Clutch Control Module, then select Control Functions, then Rear Differential Hydraulic System Service Bleed.
NOTE:
The Rear Differential Clutch Control Module can run this procedure. If this step does not pass, repeat procedure from step 2.
NOTE:
Status will change to "Complete" when done.