Tools You'll Likely Need:
* Jack and jack stands (crucial for safety!)
* Lug wrench
* Wheel chocks
* Socket wrench and sockets (various sizes, likely including 13mm, 14mm, 15mm, and possibly others)
* C-clamp or caliper compressor tool (highly recommended)
* Brake cleaner
* Wire brush
* New rear brake pads
* Torque wrench (essential for proper tightening)
* Gloves
* Safety glasses
Procedure:
1. Safety First: Park on a level surface, engage the parking brake firmly, and use wheel chocks on the wheels that are *not* being worked on. This is paramount to prevent the vehicle from rolling. Jack up the rear of the vehicle and securely support it on jack stands. Never work under a vehicle supported only by a jack.
2. Remove the Wheel: Remove the lug nuts and carefully take off the wheel.
3. Expose the Caliper: You should now see the brake caliper, rotor, and brake pads.
4. Compress the Caliper Piston: This is often the trickiest part. The caliper piston needs to be compressed to make room for the new, thicker brake pads. A C-clamp or a purpose-built caliper compressor tool is highly recommended. Be careful not to damage the piston or boot. Some pistons rotate as they compress, so you may need to turn it while compressing. You may need to bleed the brake system afterwards if you completely push the piston back into the cylinder.
5. Remove the Brake Pads: Depending on the Bonneville's design, there might be retaining pins or clips holding the brake pads in place. These need to be removed carefully. Once removed, the old brake pads should slide out. Use a wire brush to clean any debris from the caliper and the caliper mounting bracket.
6. Install the New Brake Pads: Install the new brake pads, ensuring they slide easily into place. Reinstall any retaining pins or clips.
7. Reinstall the Wheel: Carefully put the wheel back on and tighten the lug nuts. Do not fully tighten them yet.
8. Lower the Vehicle: Lower the vehicle to the ground.
9. Torque Lug Nuts: Tighten the lug nuts to the manufacturer's specified torque (consult your owner's manual).
10. Check Brake Operation: Lower the vehicle completely. Pump the brake pedal several times to ensure the brakes engage properly. Test drive the vehicle slowly and carefully to ensure the brakes are working correctly.
11. Bleed Brakes (Possibly): If you completely retracted the caliper piston, you may need to bleed the brakes to remove any air introduced into the brake lines. This is a more advanced procedure and requires a brake bleeder kit. Again, consult your repair manual.
Important Considerations:
* Rotor Inspection: Inspect the brake rotors for wear. If they are excessively worn or scored, they will need to be replaced or resurfaced.
* Caliper Inspection: Inspect the calipers for any signs of damage or leaks.
* Brake Fluid: Check your brake fluid level regularly and top it off if needed. Brake fluid absorbs moisture over time, and old fluid can damage your brake system. Consider a flush and refill if the fluid is old or dirty.
This is a general guide. The exact procedure may vary slightly depending on the year and model of your Pontiac Bonneville. Always consult your vehicle's repair manual for detailed, model-specific instructions. Remember, brake safety is paramount. If you're unsure about any step, consult a professional mechanic.
