GM 15237762
Brake Booster

Before you replace the vacuum Brake Booster you need to disconnect the negative terminal of the battery then take off the coolant surge tank. Unplug the brake fluid sensor electrical connector and take out the master cylinder mounting nuts while placing the master cylinder aside without detaching brake lines. First disconnect the Brake Booster Vacuum Hose at its connection to the booster check valve. Pull off the instrument panel lower trim panel to access the booster. Take out the pushrod from the brake pedal and then remove the mounting nuts from the Brake Booster studs along with washer and retainer. This step needs the booster to be pushed out from its push-on nut location on the cowl. To take the booster off the cowl you need to rock it back and forth until the mounting studs slide out of the push-on nuts. Then pull the booster directly up and take it plus the seal from the front of the cowl. Check if any issues exist on the booster seal or its attaching surfaces and replace the seal if required. Install both the Brake Booster and its seal in front of the dash before putting the booster studs through and tighten the bolts to 27 nm (19 ft. Lbs.). Attach the Brake Booster pushrod plus addition parts to the brake pedal assembly following retention device rotation to complete its locking function. Put back the instrument panel lower trim before attaching the vacuum hose to the Brake Booster check valve. Install the master cylinder on the Brake Booster while tightening mounting nuts to 29 nm (21 ft. Lbs.). Return the electrical connector to its proper place on the Brake Fluid Level Sensor and restore the coolant surge tank into position. Also reconnect the battery negative cable. Finally, program the transmitters.

Place the seal and brake booster at the front of the dash.

Reinstall the instrument panel lower trim panel.