Step-by-step Guide to Replacing Drum Brakes on a 2008 GMC Sierra

How to Change Drum Brakes on a 2008 GMC Sierra

Changing the drum brakes on your 2008 GMC Sierra is a task that many DIY enthusiasts can tackle with a bit of patience, the right tools, and a clear understanding of the process. Whether you're looking to save money on labor costs or simply enjoy working on your vehicle, this guide will take you through the steps necessary to change your drum brakes safely and effectively.

Tools and Materials Needed

Before diving into the project, it's essential to gather all the necessary tools and materials. Here’s a list

1. Tools - Jack and jack stands - Lug wrench - Brake spring tool - Screwdrivers (flat head and Phillips) - Pliers - Socket set - Torque wrench - Brake cleaner - Compressed air (optional) - Safety goggles and gloves

2. Materials - New brake shoes - New drum (if necessary) - Brake grease - Brake cleaner

Safety First

Before starting any automotive work, safety is paramount. Always wear safety goggles and gloves to protect your eyes and hands from debris and sharp edges. Ensure your vehicle is parked on a level surface and engage the parking brake for additional security.

Step-by-Step Guide

Step 1 Preparation

1. Lift the Vehicle Use the jack to lift the rear of your GMC Sierra. Once elevated, place jack stands under the vehicle for safety.

2. Remove the Wheel Use a lug wrench to loosen and remove the lug nuts, and then take off the rear wheel.

Step 2 Accessing the Drum Brakes

1. Remove the Brake Drum Inspect the brake drum for retaining screws. If your drum has these, remove them. If the drum appears stuck, you may need to tap it gently with a hammer. Once loose, slide the drum off the wheel hub.

2. Examine the Brake Assembly Take a moment to inspect the brake assembly for wear and damage. If the brake shoes look worn out or if there is a significant buildup of dust and debris, it’s time for a change.

1. Disconnect the Springs Use the brake spring tool to carefully remove the retaining springs. Be cautious, as these can have a lot of tension.

2. Remove Old Brake Shoes Once the springs are removed, detach the old brake shoes. Take note of how everything is arranged; a picture can help when reassembling later.

Step 4 Installing New Brake Shoes

1. Prepare New Shoes Apply a small amount of brake grease to the contact points on the new brake shoes to ensure smooth operation.

2. Attach New Brake Shoes Align the new shoes with the backing plate and attach them using the appropriate hardware.

3. Reconnect Springs Reinstall the retaining springs using the brake spring tool. Ensure that all components are securely fastened.

Step 5 Reassemble the Drum Brake System

1. Reattach the Brake Drum Slide the brake drum back over the new brake shoes. It should fit snugly but not too tight. If it’s hard to get on, check the alignment of the shoes.

2. Secure the Drum If applicable, reinsert the retaining screws to keep the drum in place.

3. Reinstall the Wheel Place the wheel back on the hub, hand-tighten the lug nuts, and lower the vehicle using the jack.

Step 6 Final Steps

1. Torque the Lug Nuts Once the vehicle is back on the ground, use a torque wrench to tighten the lug nuts to the manufacturer’s specifications.

2. Test the Brake System Before hitting the road, pump the brakes a few times to ensure they are functioning correctly. Check for any unusual noises or issues.

Conclusion

Changing the drum brakes on your 2008 GMC Sierra may seem daunting, but with the right tools and careful attention to detail, you can perform this task successfully. Not only will you save money, but you'll also gain a better understanding of your vehicle’s braking system. Regular maintenance and timely replacement of worn parts are crucial for ensuring your truck remains safe and reliable on the road.