GM 15236237
Brake Booster

Begin the vacuum Brake Booster replacement by obtaining a power Brake Booster holder named j 22805-b. Unplug the battery first and take out the left instrument panel insulator. Pull the brake apply sensor bas out of the Brake Booster and remove the related retaining clip to detach the pushrod from the Brake Pedal. Take out the exhaust crossover part plus detach the Brake Fluid Level Sensor electric contacts. You must first remove the bpmv bracket and screws, then both master cylinder mounting nuts to free the master cylinder. Position it aside without disconnecting the brake lines. Separate the vacuum Brake Booster check valve and empty the coolant system before disconnecting the thermostat heater pipes from the engine. Use the master cylinder retaining nuts to connect the power Brake Booster holder (J 22805-B) to the booster before unlocking and turning the booster counterclockwise away from the cowl. Twist the new vacuum Brake Booster clockwise into the cowl position until the locking tab engages when you use an ratchet tool with the power Brake Booster holder (J 22805-B). Take out the holder and place the heater pipes before attaching the vacuum hose with its check valve assembly. Place both parts together and bolt them at 33 n.m (24 lb ft). Reattach bpmv hardware and framework before joining fluid level sensor electric wires. Finally install the exhaust crossover pipe. Add cooled fluid to the system while placing the Brake Booster pushrod onto the Brake Pedal after securing the retaining clip then reconnecting power.

Begin the ly7 booster replacement by collecting a power Brake Booster holder j 22805-b tool. Start the task by detaching the negative battery terminal and removing the plastic panel on the left. Pull down the brake apply sensor (BAS) and its retaining clip so you can disconnect the Brake Booster pushrod from the Brake Pedal. Take out both the exhaust crossover system pipe and disconnect the brake fluid sensor power cable. Take out the fasteners from the left front fender abs module bracket and then remove the bracket from its position. Unscrew the master cylinder nuts before lifting it from the vacuum Brake Booster yet keeping brake hydraulic pipes intact. Detach the vacuum Brake Booster check valve and place its connected hose assembly to the side. Remove all coolant from the system before removing the heat pipes connected to the engine. Use the master cylinder retaining nuts to secure the power Brake Booster holder j 22805-b to the booster unit before rotating the booster counterclockwise to remove it. Set the new vacuum Brake Booster onto the cowl and fit it in place by turning it clockwise using a ratchet attached to the power Brake Booster holder (J 22805-B). Keep away from using a flat screwdriver during this process. When you see the locking tab secured properly you may unfasten the power Brake Booster holder (J 22805-B) and reattach the coolant heater tubes. Secure the vacuum hose and check valve to the booster and carefully fit the master cylinder onto it before tightening its retaining nuts to 33 nm. Install the abs module bracket on its fasteners while keeping torque at 10 nm (7 ft. Lbs.) before joining the Brake Fluid Level Sensor wires and putting back the exhaust system crossover. Connect the Brake Booster pushrod to the Brake Pedal while putting back the retaining clip. Reinstall the bas component and its bolt at 2.5 nm torque before installing the left instrument panel insulation and reattaching the battery cable.

Reinstall the left instrument panel insulator and reconnect the negative battery cable.

Disconnect the vacuum brake booster check valve and position the vacuum hose and check valve as an assembly.