why does my GMC Sierra shake when I brake

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

402 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix brake shaking issues in GMC Sierra. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the brakes to cool before working on them.
•Always use jack stands when working underneath a vehicle.

Symptoms

•Vehicle shakes or vibrates when applying brakes
•Steering wheel vibrates during braking
•Pulsating brake pedal feel
•Increased stopping distance
•Noise from brakes (squeaking or grinding)

Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear.
2
Check brake pads for wear and proper installation.
3
Examine wheel bearings for play or damage.
4
Inspect suspension components (tie rods, control arms) for wear.
5
Perform a wheel alignment check.
6
Scan for any error codes related to the braking system.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Jack and jack stands
•Socket set
•Torque wrench
•Dial indicator
•Brake cleaner

Parts Required

•Brake rotors
•Brake pads
•Wheel bearings (if needed)
•Suspension components (if needed)

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Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.

2. Inspect and Replace Brake Components

Remove the Wheel:
- Use a jack to lift the vehicle and secure it with jack stands.
- Remove the lug nuts with a socket set and take off the wheel.
Inspect the Brake Rotors:
- Check for warping by measuring with a dial indicator.
- If warped, proceed to replace the rotors. If not, clean them with brake cleaner.
Inspect the Brake Pads:
- Check the thickness of the pads. Replace if less than 3mm.
- Remove the caliper bolts, then remove the caliper and pads.
Replace Rotors and Pads:
- Install new rotors according to the manufacturer’s specifications.
- Use proper torque values (typically 70-100 lb-ft for rotor bolts).
- Install new brake pads and reattach the caliper.

3. Inspect Suspension Components

Check Wheel Bearings:
- Jack up the vehicle and spin the wheel to check for noise or roughness.
- If defective, replace the wheel bearings.
Examine Suspension Parts:
- Inspect tie rods and control arms for wear or damage.
- Replace any worn components as necessary.

4. Wheel Alignment

After all components are inspected and repaired, perform a wheel alignment to ensure proper tracking.

Tools Required:

Jack and jack stands
Socket set
Torque wrench
Dial indicator
Brake cleaner

Parts Required:

Brake rotors
Brake pads
Wheel bearings (if needed)
Suspension components (if needed)

Estimated Repair Time: 2-4 hours

Safety Warnings:

Allow the brakes to cool before working on them.
Always use jack stands when working underneath a vehicle.