GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
GMC_Truck
🢒
2006
🢒
TopKick C-Series (Conventional) C6/C7/C8
🢒
Driveline/Axle
🢒
Drive Axle - Locking/Limited Slip
🢒 Differential Lock Switch Replacement
Removal Procedure
Apply the parking brake.
Block the vehicle wheels.
Drain all of the air reservoirs. Refer to
Air Brake Reservoir Draining
.
Important:
Tag the air lines for later installation.
Remove the air lines at the differential lock control valve. Refer to
Hose and Line Replacement - Nylon Push-In Type Fitting
.
Disconnect the wiring harness connector.
Remove the differential lock switch (2) from the air brake supply manifold (1).
Installation Procedure
Install the differential lock control valve (2) to the air brake supply manifold (1).
Connect the wiring harness connector.
Install the air lines at the differential lock control valve. Refer to
Hose and Line Replacement - Nylon Push-In Type Fitting
.
Start the engine.
Inspect for air leaks. Refer to
Air Brake System Testing
.
Verify proper operation of the inter-axle differential lock.
Remove the wheel blocks.