2009 Chevrolet Trailblazer Brake Master Cylinder

First, you need to bench bleed the master cylinder and install the master cylinder and the O-ring seal to the power vacuum brake booster. Ensure the O-ring seal is properly seated in the groove in the master cylinder body. Then, please install the master cylinder nuts and tighten the nuts to 36 N.m (27 lb-ft) and connect the master cylinder secondary brake pipe fitting and tighten the fitting to 32 N.m (24 lb-ft). Finally, you should connect the master cylinder primary brake pipe fitting and tighten the fitting to 32 N.m (24 lb-ft) and connect the master cylinder fluid level sensor electrical connector.

First, you need to lubricate the master cylinder reservoir seals and the reservoir barrel sealing areas with GM-approved brake fluid from a clean, sealed brake fluid container. Then, please install the master cylinder reservoir seals and ensure the seals are fully seated in the master cylinder body. Finally, you should install the master cylinder reservoir to the master cylinder and fill the master cylinder reservoir.

First, you need to remove the brake fluid from the master cylinder reservoir and discard it in an approved container. Then, please spread the master cylinder reservoir locking tabs and lift the reservoir upward from the master cylinder. Finally, you should clean the area surrounding the master cylinder and the master cylinder body with denatured alcohol and a clean shop cloth, and remove the master cylinder reservoir seals.

First, you need to apply and release the brake pedal several times until the pedal becomes firm to deplete the power vacuum brake booster vacuum reserve, and use a suitable tool to remove the brake fluid from the brake master cylinder reservoir. Then, please discard the brake fluid into an approved container and disconnect the master cylinder fluid level sensor electrical connector, the master cylinder secondary brake pipe fitting, and the master cylinder primary brake pipe fitting. Finally, you should remove the master cylinder nuts, the master cylinder and remove the O-ring seal from the master cylinder body.

First, you need to secure the mounting flange of the brake master cylinder in a bench vise, remove the master cylinder reservoir cap and diaphragm, install suitable fittings to the master cylinder ports that match the type of flare seat required, and also provide for hose attachment, and install transparent hoses to the fittings installed to the master cylinder ports, then route the hoses into the master cylinder reservoir. Then, please fill the master cylinder reservoir to at least the halfway point with GM-approved brake fluid from a clean, sealed brake fluid container, ensure that the ends of the transparent hoses running into the master cylinder reservoir are fully submerged in the brake fluid, use a smooth, round-ended tool to depress and release the primary piston as far as it will travel, a depth of about 25 mm (1 in), several times. As air is bled from the primary and secondary pistons, the effort required to depress the primary piston will increase and the amount of travel will decrease. You need to continue to depress and release the primary piston until fluid flows freely from the ports with no evidence of air bubbles, remove the transparent hoses from the master cylinder reservoir, and install the master cylinder reservoir cap and diaphragm. Finally, you should remove the fittings with the transparent hoses from the master cylinder ports, wrap the master cylinder with a clean shop cloth to prevent brake fluid spills, and remove the master cylinder from the vise.