1998 Pontiac Bonneville Brake Service (ONLINE REPAIR MANUALS)

Replace

• Remove approximately ^2/3 of brake fluid from master cylinder.
• Raise and support front of vehicle, then remove wheel and tire assembly.
• Using suitable C-clamp, push piston back into caliper bore, Fig. .
• If caliper assembly is being removed for service, remove inlet fitting attaching bolt, copper washer, and inlet fitting from caliper housing. Plug opening in inlet fitting to prevent fluid loss and contamination. Do not crimp brake hose, as this may damage internal structure of hose. If only shoe and lining assemblies are to be replaced, do not disconnect brake line fitting fr...

Brake Pedal

Toyota/GM Single Diaphragm Type

• With engine running and brake pedal in rest position, measure distance between face of pedal and floor mat.
• If distance is not 5.79-6.18 inches, adjust pedal height as follows:
• Remove left lower instrument panel trim section and air duct.
• Loosen stop lamp switch sufficiently to gain clearance for pedal adjustment.
• Loosen locknut and rotate pedal pushrod as needed to obtain specified pedal height, then tighten locknut.
• Adjust position of brake light switch so that plunger lightly contacts pedal stopper and brake lamps are off when pedal is release...

• If any parts are of doubtful strength or quality due to heat discoloration, or are worn, replace them.
• Inspect wheel cylinder dust boots for signs of excessive wear or damage. If any leakage is apparent replace wheel cylinder.
• Clean dirt and/or rust from brake drum, backing plate and all other components. Do not use compressed air or dry brush to clean brake parts. Many brake parts contain asbestos fibers which, if inhaled, can cause serious injury. Clean brake parts with a water soaked rag or a suitable vacuum cleaner to minimize airborne dust.

Brake Drums

Any time the brake drums are r...

When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations the amount of asbestos dust from brake lining wear is at a low level due to a chemical breakdown during use, and a few precautions will minimize exposure.

• Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent excessive asbestos exposure.
• Wear a suitable respirator approved for asbestos dust use during all repair proced...

ABS Service

Before performing any repairs on the ABS system, note the following precautions:

• Before using electric welding equipment, disconnect EBTCM.
• Carefully note routing, position and mounting ABS and TCS wiring, connectors, clips and brackets. ABS and TCS are extremely sensitive to electromagnetic interference.
• Do not use a fast charger when battery is connected. Never disconnect battery from system with engine running.
• Ignition switch must be in Off position when disconnecting EBTCM.
• Many ABS system components ...