GM Service Manual Online
For 1990-2009 cars only

Causes

Correction

Damaged vacuum booster

Replace the vacuum booster

Brake pedal linkage interference/binding

Repair or replace the brake pedal linkage.

Contaminated or improper brake fluid

Flush the brake system and repair the affected brake components.

Restricted passage in the vacuum booster

Locate and repair the restriction in the vacuum booster.

Restricted brake fluid passage

Locate and repair the brake fluid restriction.

Sticky caliper or caliper pistons

Replace or repair the caliper.

Parking brake not releasing

Repair the malfunctioning parking brake lever or the frozen parking brake cables.

Improper caliper to knuckle clearance

Repair as necessary.