Yukon Denali 4WD V8-6.0L Hybrid (2011)
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.
5. Remove the master cylinder nuts (1).
Discard the master cylinder nuts.
6. Without disconnecting the brake pipes, release and carefully position aside the master cylinder (1).
Support the master cylinder with heavy mechanics wire or equivalent.
