how to change drum brakes on a 2008 gmc sierra

How to Change Drum Brakes on a 2008 GMC Sierra

Changing the drum brakes on a 2008 GMC Sierra is a crucial maintenance task that helps ensure safe driving. Drum brakes, commonly found on the rear wheels of many vehicles, can wear out over time due to friction and heat. If you notice squeaking sounds, reduced braking performance, or a warning light on your dashboard, it may be time to replace your drum brakes. Here’s a step-by-step guide to help you through the process.

Tools and Materials Needed

Before you start, gather the required tools and materials

- Jack and jack stands - Tire iron/wrench - Screwdrivers (flathead and Phillips) - Brake cleaner - Replacement drum brake kit (including drums, shoes, springs, and hardware) - Torque wrench - C-clamp or brake tool

Step 1 Prepare the Vehicle

1. Safety First Park your GMC Sierra on a flat surface and engage the parking brake. Make sure to wear safety glasses and work gloves. 2. Loosen Lug Nuts Use the tire iron to loosen the lug nuts on the rear wheels slightly. Do not remove them yet. Step 2 Lift the Vehicle

1. Jack Up the Vehicle Position the jack under the rear axle and lift the truck until the wheels are off the ground. 2. Secure the Vehicle Place jack stands under the vehicle for added safety.

1. Take Off the Wheels Remove the loosened lug nuts completely and take the wheels off. Set them aside in a safe place.

Step 4 Remove the Drum

1. Inspect the Drum Look for any retaining screws that might hold the drum in place. If present, remove them. 2. Remove the Drum Gently pull the drum off the wheel hub. If it’s stuck due to rust or debris, tapping the drum with a rubber mallet may help loosen it.

Step 5 Replace the Brake Shoes

1. Remove Old Shoes Take note of how the existing brake shoes and hardware are arranged. Use screwdrivers and a brake tool to remove the old shoes and springs. 2. Clean the Assembly Use brake cleaner to clean the backing plate and other components, removing any dust or debris. 3. Install New Shoes Position the new brake shoes in place, attaching them with the new springs and hardware as per the manufacturer’s instructions.

Step 6 Reinstall the Drum

1. Position the Drum Once the new shoes are in place, slide the drum over the brake assembly. Ensure it rotates freely without excessive dragging. Step 7 Reattach the Wheels

1. Put the Wheels Back On Reattach the wheels and hand tighten the lug nuts. 2. Lower the Vehicle Carefully remove the jack stands and lower the vehicle back to the ground.

Step 8 Final Steps

1. Tighten Lug Nuts Once the vehicle is on the ground, use a torque wrench to tighten the lug nuts to the manufacturer’s specifications. 2. Test the Brakes Before driving, pump the brake pedal a few times to ensure the brake shoes are properly seated.

Changing the drum brakes on your 2008 GMC Sierra can be a rewarding DIY task. Regular maintenance will not only improve performance but also extend the life of your braking system. Always refer to your vehicle's manual for specific guidance and safety precautions. If you encounter any problems or feel unsure about any step, consulting a professional mechanic is advisable.