how to fix GMC Sierra T1XX (2019-Present) that shakes when braking

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

486 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 fix shaking when braking in GMC Sierra T1XX (2019-Present). Step-by-step guide with diagnostic steps and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always allow the vehicle to cool before working on the brakes.
•Disconnect the battery if working on any electrical components related to ABS systems.

Symptoms

•Steering wheel shakes during braking
•Vehicle pulls to one side when braking
•Brake pedal feels pulsating underfoot
•Increased stopping distance
•Unusual noises such as grinding or squeaking from the brakes

Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear.
2
Check brake pad condition for wear and contamination.
3
Examine suspension components for any play or damage, including control arms and bushings.
4
Inspect wheel alignment and tire condition for uneven wear.
5
Check for any loose or damaged components in 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 (for rotor measurement)

Parts Required

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

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Diagnostic Steps

1
Inspect brake rotors for warping or uneven wear.
2
Check brake pad condition for wear and contamination.
3
Examine suspension components for any play or damage, including control arms and bushings.
4
Inspect wheel alignment and tire condition for uneven wear.
5
Check for any loose or damaged components in the braking system.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Place wheel chocks behind the rear wheels for safety.

2. Raise the Vehicle

Use a jack to lift the front of the vehicle and secure it with jack stands.
Remove the front wheels using a socket set.

3. Inspect and Replace Brake Components

3.1 Inspect Brake Rotors

Use a dial indicator to measure rotor runout; replace if warped beyond specifications (typically more than 0.002 inches).
If rotors are within specs but have uneven wear, consider resurfacing if applicable.

3.2 Replace Brake Pads

Remove caliper bolts with a socket set.
Slide the caliper off the rotor and hang it using a bungee cord to avoid straining the brake line.
Remove the old brake pads and inspect the caliper for any damage or fluid leaks.
Install new brake pads, ensuring they fit snugly in the caliper bracket.

4. Reassemble Components

Reinstall the caliper over the new brake pads and tighten caliper bolts to manufacturer specifications (typically around 25-35 ft-lbs).
Reinstall the wheels and hand-tighten wheel lug nuts.

5. Lower the Vehicle and Torque Wheels

Carefully lower the vehicle from the jack stands using the jack.
Torque the wheel lug nuts to the manufacturer’s specified value (usually around 140-160 ft-lbs).