What you'll need:
* Brake fluid: Use DOT 3 brake fluid specifically. Do not use DOT 4 or 5.1 unless your owner's manual specifies it. Get fresh fluid; old fluid can contain moisture that can damage your brake system.
* Brake bleeder wrench: A small, open-ended wrench that fits your bleeder valve (usually 8mm or 10mm). A specialized brake bleeder wrench with a hose attachment makes the job much easier.
* Clear tubing: A length of clear tubing that fits snugly over the bleeder valve.
* Jar or container: To catch the old brake fluid.
* Wrench (optional): For holding the caliper.
* Shop rags or paper towels: Brake fluid is corrosive, so be prepared to clean up any spills immediately.
* A helper: This is crucial for a successful brake bleed.
Safety Precautions:
* Wear safety glasses: Brake fluid is corrosive and can cause eye damage.
* Work in a well-ventilated area: Brake fluid fumes are harmful.
* Check your brake fluid reservoir: Ensure it's topped off *before* you start. Keep an eye on the level throughout the process and add more fluid as needed to prevent air from being sucked into the system. Never let the reservoir run completely empty.
* Dispose of old brake fluid properly: It's a hazardous waste. Check with your local waste disposal facility for proper disposal methods.
Bleeding Procedure (Gravity Bleed Method):
This method is simpler, but may take slightly longer. Pressure bleeding is faster and more efficient, but requires specialized tools.
1. Locate the bleeder valves: These are typically located on the top of each brake caliper (front and rear). You'll have one on each wheel.
2. Prepare your tools: Attach the clear tubing to the bleeder valve, and submerge the other end in the jar filled with some brake fluid.
3. Start with the furthest wheel from the master cylinder: This is usually a rear wheel. The order is generally: Rear passenger side, Rear driver side, Front passenger side, Front driver side. However, your owner's manual may specify a different order.
4. Have your helper pump the brake pedal slowly and firmly: Tell them to hold the pedal down after a few pumps.
5. Open the bleeder valve slowly: Use your wrench to carefully crack open the bleeder valve. You should see old brake fluid and potentially air bubbles coming through the tube.
6. Close the bleeder valve: Once the fluid runs clear and free of air bubbles, close the bleeder valve tightly.
7. Release the brake pedal: Your helper should release the brake pedal slowly.
8. Repeat steps 4-7: Repeat steps 4-7 for each wheel, moving from furthest to closest to the master cylinder. You may need to repeat the process multiple times per wheel to get all the air out.
9. Check the brake fluid reservoir: Top off the reservoir as needed throughout the process.
10. Test the brakes: After bleeding all four wheels, carefully test the brakes in a safe, open area. The brake pedal should feel firm. If it doesn't, repeat the bleeding process.
Important Considerations:
* ABS Systems: If your Suburban has an Anti-lock Braking System (ABS), bleeding the brakes can be more complex and may require a pressure bleeder or a scan tool to cycle the ABS pump. Consult your owner's manual or a professional mechanic in this case.
* Power Brakes: Power brakes require a functioning vacuum booster. Make sure the engine is running while bleeding the brakes to maintain power assist.
* If you're unsure: Bleeding brakes is a relatively simple job, but if you're not comfortable performing it yourself, it's always best to take your vehicle to a qualified mechanic. A improperly bled brake system is dangerous.
Remember to consult your 2002 Chevy Suburban owner's manual for specific instructions and diagrams. The procedures might slightly vary depending on the specific model and brake system configuration.
