However, if you're determined to do it yourself, here's a general guide. Remember, this is a general overview, and you MUST consult your Tahoe's specific repair manual for detailed instructions and torque specifications. Your year and model will have variations.
Tools and Materials You'll Need:
* New brake fluid: Use the type specified in your owner's manual (DOT 3, DOT 4, or DOT 5.1). DOT 5 is silicone-based and generally NOT compatible with most systems.
* Brake fluid bleeder wrench: Usually a 8mm or 10mm, but check your manual.
* Clear tubing: Long enough to reach a container.
* Container: To catch the old brake fluid (a jar or bottle works well).
* Wrench: To access the bleeder valve (might need different sizes).
* Jack and jack stands: To safely lift the vehicle.
* Wheel chocks: For added safety.
* Gloves: Brake fluid is corrosive.
* Clean rags or shop towels: To clean up spills.
* Pliers (optional): For stubborn bleeder valves.
* A helper: This is highly recommended, to make the process much easier.
Procedure:
1. Safety First: Park on a level surface, engage the parking brake, and use wheel chocks. Wear safety glasses and gloves.
2. Locate Bleeder Valves: These are typically located on top of each brake caliper. Consult your repair manual for precise locations.
3. Prepare: Open the brake fluid reservoir and check the fluid level. Top it off if necessary with the correct type of fluid.
4. Bleeding Sequence: The correct bleeding order is crucial. The typical sequence is Rear Passenger, Rear Driver, Front Passenger, Front Driver (RR, RL, RF, LF). Check your owner's manual for the correct sequence for your specific Tahoe model year.
5. Bleeding Process (with a helper):
* Have your helper pump the brake pedal several times and then hold it down.
* Open the bleeder valve slowly using your wrench.
* You'll see old, dark brake fluid exiting through the tubing into the container.
* Once the fluid runs clear (or significantly cleaner), close the bleeder valve.
* Repeat this process for each wheel, ensuring the brake fluid reservoir is always topped off. This prevents air from entering the system.
6. Check for Air Bubbles: Keep an eye on the fluid coming from the bleeder valve. If you see air bubbles, continue bleeding that wheel until the fluid runs clean.
7. Repeat: Repeat steps 5 & 6 for each wheel, following the correct bleeding sequence.
8. Top Off Reservoir: Once all wheels are bled, top off the brake fluid reservoir to the correct level.
9. Test Brakes: After bleeding, carefully test the brakes. Pump the brake pedal several times to ensure a firm pedal. If the pedal feels spongy or weak, there's likely still air in the system, and you'll need to repeat the bleeding process.
10. Check for Leaks: Inspect the brake lines and calipers for any leaks.
Important Considerations:
* Power Brake Booster: Some systems require special procedures for bleeding the power brake booster. Consult your repair manual.
* ABS Systems: Vehicles with Anti-lock Braking Systems (ABS) often require a specialized scanner tool to properly bleed the system. Attempting to bleed an ABS system without the proper equipment could damage the system.
* Fluid Type: Using the wrong type of brake fluid can severely damage your brake system. Always use the type specified in your owner's manual.
* Disposal: Properly dispose of the old brake fluid. It is hazardous waste. Check with your local regulations for proper disposal methods.
Again, if you're not completely comfortable with this procedure, take your Tahoe to a qualified mechanic. Your brakes are crucial for your safety and the safety of others. Don't risk it.
