how to fix my GMC Sierra T1XX (2019-Present) that shakes when I brake?

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

543 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 shaking brakes in GMC Sierra T1XX (2019-Present). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is parked on a level surface and the parking brake is engaged.
•Ensure the vehicle is securely supported on jack stands before working underneath.

Symptoms

•Steering wheel shakes or vibrates during braking
•Vehicle pulls to one side when braking
•Pulsation felt in the brake pedal
•Increased stopping distance
•Uneven wear on brake pads or rotors

Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear.
2
Check brake pads for thickness and signs of uneven wear.
3
Examine suspension components, including control arms and bushings, for wear or damage.
4
Verify wheel alignment and balance.
5
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
•Lug wrench
•Torque wrench
•Brake cleaner
•Caliper tool

Parts Required

•New brake rotors
•New brake pads

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Solution

1. Preparation

Gather Tools:
- Jack and jack stands
- Lug wrench
- Torque wrench
- Brake cleaner
- Caliper tool
Safety Warning:
- Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Remove Wheels

Loosen the lug nuts with the lug wrench while the vehicle is on the ground.
Raise the vehicle using the jack and secure it with jack stands.
Remove the wheels to access the brake components.

3. Inspect and Replace Brake Rotors

Rotor Inspection:
- Check the rotors for warping using a dial indicator. If warped beyond specifications (usually 0.002 inches), they need replacement.
Rotor Replacement:
- Remove the caliper by unbolting it from the bracket (usually two bolts).
- Remove the old rotor and clean the hub surface with brake cleaner.
- Install the new rotor, ensuring it is seated properly on the hub.
- Reattach the caliper and torque bolts to manufacturer specifications (typically around 25-35 ft-lbs).

4. Inspect and Replace Brake Pads

Pad Inspection:
- Check the brake pads for thickness. Replace if they are less than 3mm thick or unevenly worn.
Pad Replacement:
- Remove the old brake pads from the caliper bracket.
- Compress the caliper piston using a caliper tool until it is fully retracted.
- Install new brake pads, ensuring they are oriented correctly in the bracket.
- Reinstall the caliper over the new pads and torque bolts.

5. Check Suspension Components

Inspect the control arms, ball joints, and bushings for any signs of wear or damage. Replace any worn components as necessary.
Ensure that all suspension bolts are torqued to manufacturer specifications.

6. Wheel Alignment and Balance

After reassembling the brakes and suspension, check wheel alignment and balance. Adjust as necessary.