OEM 2003 GMC Envoy Brake Booster

2003 GMC Envoy Brake Booster Parts Questions & Experts Answers

• Q: How to replace the vacuum brake booster on 2003 GMC Envoy?

  A: Apply the parking brake first and remove the master cylinder before beginning vacuum booster replacement. Detach the vacuum hose from the vacuum booster and the engine before removing the left closeout/insulator panel. Start with removing the Pushrod retainer from the brake pedal pin then extract the stop lamp switch before removing the Pushrod from the brake pedal pin. The installation begins with uninstalling the vacuum booster mounting nuts before removing both the vacuum booster assembly and gasket. Begin installation by mounting the vacuum booster assembly with its gasket then torque the vacuum booster mounting nuts to 40 nm (30 ft. Lbs.). Install the stop lamp switch to the Pushrod then position it on the brake pedal pin. After attaching the Pushrod retainer to brake pedal pin let the retainer snap into position before reinstalling the left closeout/insulator panel. During installation connect the vacuum hose to both the vacuum booster and engine before reattaching the master cylinder.