Tools You'll Need:
* Jack and jack stands (crucial for safety!)
* Wheel chocks
* Lug wrench
* Socket wrench and sockets (various sizes, likely including 15mm, 18mm, possibly others)
* C-clamp or brake caliper compression tool
* Wire brush or brake cleaner
* New rear brake pads
* Torque wrench (highly recommended)
* Penetrating lubricant (like PB Blaster)
* Gloves
* Safety glasses
Procedure (Disc Brakes):
1. Safety First: Park on a level surface, engage the parking brake firmly, and chock the front wheels. Jack up the rear of the Avalanche 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 using the lug wrench. Then, carefully remove the wheel and set it aside.
3. Expose the Caliper: You should now see the brake caliper clamping onto the rotor.
4. Compress the Caliper Piston: This is the most critical step. Use the C-clamp or caliper compression tool to slowly and carefully push the brake caliper piston back into the caliper. This creates space for the new, thicker brake pads. Be prepared for some resistance. The piston may be stiff due to brake fluid pressure. If you’re using a C-clamp, use a block of wood to protect the caliper piston from damage. *Note: As you compress the piston, brake fluid will be pushed back into the brake lines. It's a good idea to check your brake fluid reservoir level beforehand and potentially top it off.*
5. Remove the Old Pads: Usually, there are retaining pins or clips holding the brake pads in place. These will need to be removed using the appropriate socket or other tools. Carefully remove the old brake pads. Inspect the brake rotor for excessive wear or damage.
6. Clean the Caliper: Use a wire brush or brake cleaner to remove any debris or rust from the caliper and its sliding surfaces.
7. Install the New Pads: Install the new brake pads, ensuring they slide easily into their slots. Replace any retaining pins or clips.
8. Reinstall the Caliper: Carefully slide the caliper back over the rotor and brake pads.
9. Reinstall the Wheel: Put the wheel back on and tighten the lug nuts hand-tight. Then, lower the Avalanche using the jack.
10. Torque the Lug Nuts: Use your torque wrench to tighten the lug nuts to the manufacturer's specified torque. This information can be found in your owner's manual.
11. Test the Brakes: Before driving, pump the brake pedal several times to ensure proper engagement and check for leaks. Then, take a short, cautious test drive to verify that the brakes are functioning correctly.
Important Considerations:
* Brake Fluid: If you're uncomfortable with brake fluid levels or compression of the piston, it's best to take your Avalanche to a professional. Incorrect handling of brake fluid can lead to air in the lines and brake failure.
* Rotor Condition: Inspect your rotors carefully. If they are severely worn, grooved, or damaged, they need to be replaced as well.
* Caliper Slides: Lubricate the caliper slides (pins and bushings) with brake caliper grease. This helps ensure the caliper moves freely.
This is a general guide. Consult your owner's manual for specific instructions and torque specifications for your 2002 Chevy Avalanche. If you're not comfortable performing this repair yourself, it's always best to take it to a qualified mechanic. Brake safety is paramount.
