Tools You'll Need:
* Brake bleeding kit: This usually includes a clear hose, a wrench (typically 8mm or 10mm – check your caliper and bleeder screw sizes), and a container to catch the old brake fluid. A vacuum bleeder is highly recommended for ease and efficiency, especially on your own.
* New brake fluid: Use DOT 3 brake fluid (check your owner's manual to be certain). DOT 3 is readily available at most auto parts stores. Never mix different types of brake fluid.
* Wrench: To open the bleeder valves on the calipers.
* Clean rags or paper towels: To clean up spills.
* Helper (recommended): Having a helper makes the process much easier.
* Gloves: Brake fluid is corrosive.
Procedure:
1. Safety First: Engage the parking brake firmly. This is crucial.
2. Locate Bleeder Valves: The rear brake bleeder valves are located on the top of each rear brake caliper.
3. Prepare the System: Have your helper sit in the driver's seat with their foot on the brake pedal. Make sure the brake fluid reservoir is topped off with fresh DOT 3 fluid. *Do not let the reservoir run dry.*
4. Bleeding Sequence (Rear Brakes Only): The standard bleeding sequence is usually passenger side rear, then driver side rear. This is important to ensure proper air expulsion. Some mechanics suggest starting with the furthest wheel from the master cylinder (which is behind the brake pedal).
5. Bleed Each Caliper:
* Attach the clear hose from the bleeder valve to the container.
* Have your helper firmly depress the brake pedal several times without letting it fully return.
* Crack open the bleeder valve (slightly) using the wrench while the pedal is depressed.
* Let the pedal return fully, then close the bleeder valve.
* Repeat this process several times (at least 5-7 times) until you have a steady stream of brake fluid with no air bubbles.
* Remember to keep an eye on the brake fluid reservoir and top it off as needed.
* Repeat this process for the other rear caliper.
6. Check for Leaks: After bleeding, carefully check for any leaks around the bleeder valves and brake lines.
7. Test the Brakes: With the help of a friend, or in a safe, empty area, carefully test your brakes and see if the pedal feels firm. Never test your brakes in traffic until you are confident the bleed is complete. If the pedal feels soft or spongy, there may be air still in the system and you should repeat the bleeding process.
8. Dispose of Old Brake Fluid Properly: Brake fluid is hazardous waste, and should be disposed of according to local regulations.
Important Considerations for a 1996 Silverado:
* Old Brake Lines: Given the age of your truck, the brake lines themselves might be corroded or weakened. Inspect them closely for any signs of damage before and after bleeding. If you find any damage, replace the affected lines immediately.
* Abs System: If your truck has an Anti-lock Braking System (ABS), bleeding might be more complicated and require specialized tools or a scan tool to properly bleed the ABS module. If you're not comfortable working on an ABS system, it is recommended you consult a professional mechanic.
* Master Cylinder: If you've recently replaced the master cylinder or experienced significant brake problems, you might need to completely flush the brake system. This involves more extensive bleeding and potentially requires professional help.
Vacuum Bleeder Recommendation: If you're not comfortable with the manual method, a vacuum bleeder makes this process considerably easier and more efficient. It automatically draws the brake fluid, making it less labor-intensive and more likely to remove all air from the lines.
If you are not comfortable performing this task yourself, it's best to take your truck to a qualified mechanic. Brake systems are critical safety components; improper bleeding can lead to brake failure.
