Sierra 3500 Denali 4WD V8-6.0L (2011)
9. Connect the brake master cylinder reservoir return hose quick connect (1).
10. Connect the brake master cylinder reservoir supply hose quick connect (2).
11. Fill the brake master cylinder reservoir. Refer to Master Cylinder Reservoir Filling (Non-Hybrid) (See: )Master Cylinder Reservoir Filling
(Two-mode Hybrid) (See: ).
Brake Master Cylinder Adapter Replacement
Brake Master Cylinder Adapter Replacement
Removal Procedure
1. Place the transmission in the PARK or NEUTRAL position.
2. Apply the park brake.
Note: The ignition must be in the OFF position, without pausing at ACCESSORY, and without applying the brake pedal to ensure the brake
modulator and high pressure accumulator (HPA) pressure relief occurs. This process will take approximately 1 to 3 minutes.
3. Turn the ignition to OFF, without pausing at ACCESSORY, and without applying the brake pedal.
Remove the ignition key.
4. Wait approximately 1 to 3 minutes until the brake modulator and HPA pressure relief is complete.
