Sierra Denali RWD V8-6.2L (2009)
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.
