my GMC Sierra T1XX (2019-Present) shakes when I brake, what could be wrong?

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

515 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 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

•Disconnect the battery before working on electrical systems.
•Allow brakes to cool before handling components to avoid burns.

Symptoms

•Steering wheel shakes during braking
•Vibration felt in the brake pedal
•Uneven brake wear
•Noises such as grinding or squeaking when braking
•Pulling to one side while braking

Diagnostic Steps

1
Inspect brake rotors for warping or damage.
2
Check brake pads for uneven wear or deterioration.
3
Examine suspension components for wear or damage.
4
Test wheel alignment and balance.
5
Inspect brake fluid levels and condition.
6
Scan for any ABS-related error codes.

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
•Jack stands
•Lug wrench
•Torque wrench
•Brake cleaner
•Measuring calipers
•OBD-II scanner

Parts Required

•Brake rotors (if warped)
•Brake pads (if worn)

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Solution

1. Preparation

Tools Required: Jack, jack stands, lug wrench, torque wrench, brake cleaner, measuring calipers, and OBD-II scanner.
Ensure the vehicle is parked on a level surface and the parking brake is engaged.
Disconnect the battery to avoid any electrical issues while working.

2. Remove Wheel

Loosen lug nuts with a lug wrench slightly while the vehicle is still on the ground.
Raise the vehicle using a jack and secure it with jack stands.
Fully remove the lug nuts and take off the wheel.

3. Inspect Brake Components

Brake Rotors:
- Measure the thickness of the rotors using calipers to ensure they are within manufacturer specifications.
- Check for any visible warping or scoring on the rotor surfaces.
Brake Pads:
- Inspect the brake pads for uneven wear and ensure they have adequate material remaining.
- Replace any pads that are worn down to 3mm or less.

4. Replace Rotors and Pads (if necessary)

If rotors are warped, remove the caliper by unbolting it from the bracket.
Remove the rotor by sliding it off the hub.
Install the new rotor, ensuring it is seated correctly.
Replace the brake pads in the caliper bracket.
Reinstall the caliper and torque bolts to manufacturer specifications (usually around 20-30 ft-lbs).

5. Reassemble and Test

Reinstall the wheel and hand-tighten the lug nuts.
Lower the vehicle and torque the lug nuts to the specified value (typically 75-100 ft-lbs).
Reconnect the battery.
Test drive the vehicle to ensure the issue is resolved.