2000 GMC C2500 Pickup Brake Service (ONLINE REPAIR MANUALS)

Brake Lines & Linings

Remove one of the front wheels and inspect the brake disc, caliper and linings.

Do not allow any oil or grease on the linings. It is recommended that linings be replaced in sets when worn or damaged.

If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.

Brake Roughness

The most common cause of brake chatter on disc brakes is a variation in thickness of the disc. If roughness or vibration is encountered during highway operation or if pedal pumping is experienced at low speeds, the disc may have excessive thickness v...

Removal

Front

• Siphon brake fluid out of master cylinder until fluid level is approximately ^1/3 full, this will prevent fluid overflow when caliper piston is pushed back into its bore.
• Raise and support vehicle, then remove wheels.
• Push piston back into its bore using suitable C-clamp, Fig. .
• Remove two caliper mounting bolts and lift caliper off of rotor.

Rear

Blazer, Bravada & Jimmy

• Raise and support vehicle.
• Mark position of wheel to hub for installation reference.
• Remove wheel assembly.
• Remove mounting bolt and disconnect brake hose fitting from caliper. Discard gaskets and plug brake h...

C & K Series

Duo-Servo

Removal

• Raise and support vehicle.
• Mark relationship of wheel to hub, then remove tire and wheel assembly.
• On models equipped with full-floating axles, remove hub and drum assembly as described in "Drive Axles."
• On models equipped with semi-floating axles, proceed as follows:
• Install pin into park brake lever.
• Mark relationship of drum to axle.
• Remove rear brake drum retainers, as required.
• Remove rear brake drum.
• On all models, remove return springs and shoe guide, Fig. .
• Remove brake hold down springs and pins.
• Disconnect actuator lever and pivot.
• Remove lever return spri...

In order to properly service power brake systems, a thorough understanding of the power assist system is necessary. These systems provide a mechanical assist, acting to increase the force applied to the master cylinder piston by the driver while decreasing the effort necessary to obtain acceptable stopping performance.

Hydraulic assist units incorporate a basic open center spool valve, hydraulic cylinder and an accumulator assembly in a common housing. When the brake pedal is depressed, the hydraulic piston moves forward closing off fluid relief passages, the spool valve applies flui...

2WD Models

Except Montana, Silhouette, Trans Sport & Venture

Front

• Raise and support vehicle.
• Remove tire and wheel assembly.
• Remove caliper as outlined under "Caliper Service."
• Remove grease cap from hub/rotor, Fig. .
• Remove cotter pin, nut and washer.
• Remove hub/rotor from spindle, being careful not to damage spindle threads or outer bearing.
• Reverse procedure to install, noting the following:
• Apply high-temperature wheel bearing grease to inner and outer wheel bearings.
• Torque nut to 12 ft. lbs. while turning wheel assembly forward by hand, back nut off one flat or until hole in spindle...

Delco Master Cylinder

When performing the following procedures, refer to Figs. and noting that the composite reservoir may vary in design.

Disassemble

• Remove master cylinder from vehicle.
• Remove reservoir cover and diaphragm. Discard old brake fluid in reservoir.
• Inspect cover and diaphragm. Replace if cut, cracked or deformed.
• Remove fluid level switch and proportioning valve assembly, if equipped.
• Depress primary piston and remove lock ring.
• Plug primary fluid outlet (outlet nearest to cowl when master cylinder is installed), then apply compressed air into secondary fluid outlet t...