GM 88967239
Brake Booster

Examine if the cruise control cable lies between the booster and cowl before replacement since contact could hurt the system. Replace the booster mounting plate locking flanges when they show sign of bending or destruction. When replacing the fuel injector sight shield you first need to remove it on the 3.8 liter engine model. Take out the brake modulator and master cylinder when the vehicle comes with abs. Unfasten both the transmission fluid filler tube and egr heat shield. Hold the Brake Pedal still to defend against switch harm while untethering the Pushrod from the Brake Pedal. Unplug both pieces including the Brake Pedal Pushrod and vacuum hose from the Brake Booster valve at its end. Secure the power Brake Booster holder (J 22805-01) to the booster by fastening it with the master cylinder nuts until they reach 25 nm (18 ft. Lbs.). Use the flat bladed tool to release the booster locking tab while turning the booster counterclockwise using a wrench attached to the power Brake Booster holder (J 22805-01). Take out the booster without breaking the insulator boot. Fit the power Brake Booster holder (J 22805-01) to the booster by screwing it on using the master cylinder nuts. Then turn them until torque reaches 25 nm and 18 ft. Lbs. Press the Pushrod eye gently through the hole keeping the insulator boot safe and install the booster onto the cowl by turning it counterclockwise to lock the flanges. Push the booster clockwise using the wrench until the locking tab clicks in the power Brake Booster holder (J 22805-01). Attach the Brake Booster Pushrod to its fitting on the Brake Pedal and connect the vacuum hose to the check valve of the booster. Reattach the transmission fluid cap and egr heat shield before placing back the brake modulator if you use abs and the master cylinder. In the end reinstall only the fuel injector sight shield for 3.8 liter engines.

To fix the Brake Booster on a 3.4l engine you need the power Brake Booster holder item j 22805-b. Start by taking off the negative Battery Cable then removing the insulator on the left instrument panel. Unplug the stop lamp switch from its electrical connection while removing the clip attached to its Brake Booster hook. This disconnects the Brake Pedal(animation rod). Cut some cooling fluid before taking off the cross vehicle brace and air cleaner inlet duct. Begin fuel system decompression then uninstall all ducts related to the evap canister purge valve and fuel system feeds while setting them off to the side. Sever the bypass tubes of the coolant outlet and inlet lines before you take the heater inlet hose off. Move the engine forward and then take off the power brake level sensor's electrical connector. Do not remove the brake pipes at the master cylinder end; keep them in place and disconnect the master cylinder by its two retaining nuts. To work on the Brake Booster remove the vacuum check valve only when you keep the combined vacuum hose and check valve as one piece. Fit the power Brake Booster holder (J 22805-B) to the booster through master cylinder retaining nuts then release the cowl lock to rotate the booster counterclockwise using a ratchet and flat-bladed tool alongside depressor of the Brake Booster locking tab. Take out the vacuum Brake Booster and remove its attaching piece called the power Brake Booster holder part number j 22805-b. Install the booster by keeping its internal parts original and undamaged locking flanges. Place the vacuum Brake Booster on the cowl and turn it counterclockwise until the locking flanges engage. Afterward, use a ratchet on the power Brake Booster holder (J 22805-B) to rotate the booster clockwise which locks the tab. Install the vacuum hose with check valve when you take out the power Brake Booster holder (J 22805-B). Put the master cylinder back on top of the booster unit and fasten its retaining nuts with a torque of 33 nm (24 ft. Lbs.). Set the brake fluid sensor electrical connection while placing the engine back in its regular position and fastening the engine mount struts on both sides. Put back the heater inlet pipe and join the coolant outlet and inlet bypass tubes while attaching the evap canister purge valve, fuel feed and return pipes. Complete the work by putting back the air cleaner inlet, crossing brace, filling the cooling system, connecting the pushrod to the Brake Pedal, attaching the clip, joining the stop lamp electrical connector, installing the instrument panel insulator, and linking the battery negative cable.

Connect the brake fluid level sensor electrical connector, install the fuel injector sight shield, and the cross vehicle brace.

Disconnect the coolant outlet and inlet bypass hoses, and remove the heater inlet pipe.

Remove the Power Brake Booster Holder (J22805-B) and reconnect the vacuum hose and check valve assembly to the booster.

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