Yukon XL 4WD V8-5.3L (2011)
9. Disconnect the electrical connector and remove the stoplamp switch (1).
10. Disconnect the brake booster pushrod from the brake pedal pin.
11. Remove the power vacuum brake booster nuts (1).
12. Remove the power vacuum brake booster.
13. Remove and discard the power vacuum brake booster gasket.
Installation Procedure