2009 Chevrolet Silverado 2500 HD Brake Master Cylinder

You should remove the brake fluid from the brake master cylinder reservoir and discard the brake fluid into an approved container.

The procedure is to visually inspect the brake fluid level through the brake master cylinder reservoir, inspect the brake system for wear and possible brake fluid leaks and clean the outside of the reservoir on and around the reservoir cap before removing the cap and diaphragm.

You can turn the ignition to OFF, remove the brake fluid, disconnect the brake fluid level sensor electrical connector, disconnect the brake master cylinder reservoir return hose quick connect and supply hose quick connect, disconnect the brake master cylinder primary brake pipe fitting, disconnect the brake master cylinder left supply brake pipe fitting and right supply brake pipe fitting, disconnect the brake master cylinder right front brake pipe fitting and left front brake pipe fitting, remove the brake master cylinder nuts and remove the brake master cylinder and the master cylinder seal.

The Brake Master Cylinder has a total of 2 nuts.

You can 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, install transparent hoses to the fittings, fill the master cylinder reservoir to at least the half-way point, depress and release the primary piston, continue to depress and release the primary piston, remove the transparent hoses from the master cylinder reservoir, install the master cylinder reservoir cap and diaphragm, remove the fittings with the transparent hoses and remove the master cylinder from the vise.