Yukon XL 4WD V8-5.3L (2011)
9. Install the O-ring seal on the master cylinder body, if removed.
10. Position the master cylinder to the power vacuum brake booster.
11. Install the brake master cylinder nuts (1) and tighten to 33 Nm (24 lb ft).
Note: A small amount of denatured alcohol may be used to ease assembly, if necessary.
12. Install the power brake booster vacuum sensor (1) and vacuum hose.
13. Connect the power brake booster vacuum sensor electrical connector.
