Removal Procedure

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Refer to Brake Fluid Irritant Caution .

NOTE: Refer to Brake Fluid Effects on Paint and Electrical Components Notice .

Apply the park brake.
Deplete the vacuum reserve in the vacuum booster by applying the brake pedal 3 times or until the brake pedal becomes firm.

Fig 1: View Of DOD Sensor, Booster Connector & Check Valve

Courtesy of GENERAL MOTORS CORP.

Remove the electrical connectors for the DOD sensor (1) and the active booster connector (2).
Remove the vacuum hose from the check valve (3).
Remove the 2 master cylinder nuts.

IMPORTANT:

It is not necessary to disconnect the brake pipes from the master cylinder.
Ensure the O-ring vacuum seal is on the master cylinder after removal.

Position the master cylinder aside and secure with heavy mechanics wire or equivalent.

Fig 2: Brake Booster Pushrod Retainer Bolt

Courtesy of GENERAL MOTORS CORP.

Remove the brake booster pushrod retainer bolt (1).

Fig 3: Brake Booster Pushrod Retainer

Courtesy of GENERAL MOTORS CORP.

Remove the brake booster pushrod retainer (1).

Fig 4: Stoplamp (Brake Light) Switch

Courtesy of GENERAL MOTORS CORP.

Remove the stoplamp switch (1).
Disconnect the brake booster pushrod from the brake pedal pivot pin.

Fig 5: Brake Booster Nuts

Courtesy of GENERAL MOTORS CORP.

Remove the brake booster nuts (1).
Remove the power vacuum brake booster.
Remove and discard the brake booster gasket.