Removal Procedure
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 GMC Yukon XL, 2012 GMC Yukon, 2012 Chevrolet Tahoe, 2012 Chevrolet Suburban, and 2012 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Place the ignition switch in the OFF position.
- Apply and release the brake pedal several times until the brake pedal becomes firm to deplete the power vacuum brake booster vacuum reserve.
- Disconnect the electrical connector and remove the power brake booster vacuum sensor (1) and vacuum hose and position aside.
- Remove the brake master cylinder nuts (1).
- Without disconnecting the brake pipe fittings from the master cylinder, remove the brake master cylinder and support with heavy mechanics wire or equivalent.
- Inspect the O-ring seal on the master cylinder body for damage and replace, if necessary.
- Remove the brake booster pushrod retainer bolt (1).
- Remove the brake booster pushrod retainer (1).
- Disconnect the electrical connector and remove the stoplamp switch (1).
- Disconnect the brake booster pushrod from the brake pedal pin.
- Remove the power vacuum brake booster nuts (1).
- Remove the power vacuum brake booster.
- Remove and discard the power vacuum brake booster gasket.