Removal Procedure

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Oldsmobile Bravada, 2004 GMC Envoy XUV, 2004 GMC Envoy XL, 2004 GMC Envoy, and 2004 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Master Cylinder To Booster View

Courtesy of GENERAL MOTORS CORP.

Remove the brake master cylinder assembly. Refer to Master Cylinder Replacement .
Drain the brake fluid from the reservoir.

NOTE: Do not clamp on the master cylinder body. Doing so may damage the master cylinder.

Clamp the flange of the master cylinder body in a vise.

Fig 2: Removing/Installing Retaining Pins For Brake Master Cylinder Reservoir

Courtesy of GENERAL MOTORS CORP.

Remove the retaining pins for the brake master cylinder reservoir.

Fig 3: Removing/Installing Reservoir At Brake Master Cylinder

Courtesy of GENERAL MOTORS CORP.

Remove the reservoir from the brake master cylinder.

Fig 4: Identifying Brake Master Cylinder Seals

Courtesy of GENERAL MOTORS CORP.

Remove the seals from the brake master cylinder.
Clean the master cylinder area with denatured alcohol, or equivalent.
Dry the master cylinder with non-lubricated, filtered air.