why does my GMC Sierra T1XX (2019-Present) shake when I brake?

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

478 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 T1XX (2019-Present). 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

•Always disconnect the battery before working on the vehicle's electrical systems.
•Allow the vehicle to cool down to prevent burns from hot components.

Symptoms

•Vehicle shakes or vibrates when brakes are applied
•Pulsating feel in the brake pedal
•Uneven wear on brake pads or rotors
•Steering wheel shakes during braking
•Possible noise or grinding sound when braking

Diagnostic Steps

1
Inspect brake pads and rotors for wear and damage.
2
Check for rotor warping by measuring thickness with a micrometer.
3
Evaluate suspension components (tie rods, ball joints) for wear or damage.
4
Examine wheel balance and alignment settings.
5
Scan for any brake-related error codes using an OBD-II scanner.

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

•OBD-II scanner
•Socket set
•Torque wrench
•Micrometer
•Brake cleaner

Parts Required

•Brake pads
•Brake rotors (if necessary)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect brake pads and rotors for wear and damage.
2
Check for rotor warping by measuring thickness with a micrometer.
3
Evaluate suspension components (tie rods, ball joints) for wear or damage.
4
Examine wheel balance and alignment settings.
5
Scan for any brake-related error codes using an OBD-II scanner.

Solution

1. Preparation

Gather the necessary tools and parts.
Ensure the vehicle is on a flat surface and engage the parking brake.
Wear safety glasses and gloves.

2. Inspect and Remove Wheels

Lift the vehicle using a jack and secure it on jack stands.
Remove lug nuts using a socket wrench and take off the front wheels.

3. Brake Component Inspection

Check Brake Pads:
- Inspect for uneven wear or thinning.
- Replace if pads are below manufacturer’s minimum thickness (usually 3mm).
Check Brake Rotors:
- Use a micrometer to measure rotor thickness and check for warping.
- If warped (beyond manufacturer specs, typically 0.002 inches), replace rotors.

4. Replace Components (if necessary)

Brake Pad Replacement:
- Remove caliper bolts with a socket wrench and slide off the caliper.
- Remove old pads and install new ones, ensuring proper orientation.
- Reinstall caliper and torque bolts to manufacturer specifications (usually around 25-35 ft-lbs).
Rotor Replacement:
- Remove rotor retaining screws (if applicable).
- Slide off the old rotor and install the new rotor.
- Torque retaining screws to manufacturer specifications.

5. Reassemble and Test

Reinstall wheels and torque lug nuts to manufacturer specifications (typically 80-100 ft-lbs).
Lower the vehicle and test brake functionality at low speeds.
Check for any remaining vibrations after repair.