how to change drum brakes on a 2008 gmc sierra

How to Change Drum Brakes on a 2008 GMC Sierra

Changing drum brakes on a 2008 GMC Sierra is a practical skill that can save you money on repairs and increase your understanding of vehicle maintenance. While it may seem daunting for the uninitiated, with the right tools and some guidance, you can complete the job on your own. This guide will walk you through the necessary steps to replace your drum brakes, ensuring a safer and smoother driving experience.

Tools and Materials Needed

Before you begin, gather the necessary tools and materials

- New brake shoes - Brake drum - Brake cleaner - Socket set and wrenches - Screwdrivers (flat and Phillips) - Pliers - Brake spring tool (optional but helpful) - Torque wrench - Jack and jack stands - Safety glasses and gloves

Steps to Change Drum Brakes

1. Preparation and Safety First Begin by parking your GMC Sierra on a level surface. Engage the parking brake and wear safety glasses and gloves. Loosen the lug nuts on the rear wheels using a lug wrench, but do not completely remove them yet.

2. Lift the Vehicle Use a jack to lift the rear of the truck, and place jack stands beneath the frame for added safety. Once the vehicle is securely lifted, remove the lug nuts completely and take off the rear wheels.

3. Remove the Brake Drums Inspect the drum for any signs of rust or corrosion. If the drums are stuck, gently tap around the drum with a rubber mallet to loosen it. Once it’s free, slide it off the wheel hub.

4. Inspect and Remove Old Brake Shoes Once the drum is off, you will see the brake shoes and the hardware holding them in place. Take a moment to inspect the condition of the old shoes and hardware. Using a screwdriver and pliers, remove the springs and retainers that hold the shoes in place. Be cautious as the springs can be under tension.

5. Compare New and Old Brake Shoes Before installing the new shoes, compare them with the old ones to ensure they match in size and shape. This is crucial to avoid any compatibility issues.

6. Install New Brake Shoes Begin by attaching the new brake shoes to the backing plate, ensuring they are correctly positioned. Use the brake spring tool to install new springs and retainers. Ensure everything is secure and that the shoes can move freely.

7. Reinstall the Brake Drums Once the new brake shoes are in place, slide the brake drum back onto the hub. If you’ve replaced the drum, make sure it is properly seated.

8. Reattach the Wheels Place the wheel back onto the hub and hand-tighten the lug nuts. Lower the vehicle slightly so that the wheel touches the ground but is not fully loaded. This helps ensure proper alignment while you tighten the lug nuts fully.

9. Tighten the Lug Nuts Use a torque wrench to tighten the lug nuts to the manufacturer’s specifications. For the 2008 GMC Sierra, this is typically around 140 lb-ft, but always consult your vehicle’s manual to confirm the correct torque settings.

10. Perform a Brake Test After everything is reassembled, pump the brake pedal several times to ensure the brake shoes are seated properly and that the brakes are functioning. Take the vehicle for a short test drive at a low speed to confirm everything is working as it should.

Conclusion

Changing drum brakes on your 2008 GMC Sierra is an achievable task with the right tools and patience. Regular maintenance of your brake system is crucial for safe driving, so make it a part of your routine vehicle care. If you encounter any issues during the process or if you are unsure, do not hesitate to consult a professional mechanic for guidance. With practice, you will become more confident in your automotive skills and save money in the long run. Happy wrenching!