how to fix GMC Sierra T1XX (2019-Present) that shakes when driving at high speeds

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

505 words

Problem Statement

Learn how to diagnose and fix shaking issues in GMC Sierra T1XX at high speeds. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always wear safety glasses when working on vehicles.
•Ensure the vehicle is securely lifted and supported before working underneath.

Symptoms

•Vibrations felt in the steering wheel or the seat at high speeds
•Uneven tire wear
•Steering wheel pulling to one side
•Noise from the tires or suspension components
•Difficulty maintaining a straight line while driving

Diagnostic Steps

1
Inspect tire pressure and ensure all tires are inflated to the manufacturer's specifications.
2
Check for uneven tire wear patterns that may indicate alignment issues.
3
Perform a visual inspection of the suspension components for wear or damage.
4
Road test the vehicle to determine the speed range at which the shaking occurs.
5
Use a wheel balancing machine to check for unbalanced wheels.
6
Inspect the driveshaft and U-joints for any signs of damage or play.

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

•Socket set
•Torque wrench
•Tire pressure gauge
•Wheel balancing machine

Parts Required

•Tires (if replacement is needed)
•Suspension components (if damaged)

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Diagnostic Steps

1
Inspect tire pressure and ensure all tires are inflated to the manufacturer's specifications.
2
Check for uneven tire wear patterns that may indicate alignment issues.
3
Perform a visual inspection of the suspension components for wear or damage.
4
Road test the vehicle to determine the speed range at which the shaking occurs.
5
Use a wheel balancing machine to check for unbalanced wheels.
6
Inspect the driveshaft and U-joints for any signs of damage or play.

Solution

1. Preparation

Gather required tools and parts.
Park the vehicle on a level surface and engage the parking brake.
Ensure the engine is off and the vehicle is cool.

2. Tire Inspection and Rotation

Sub-steps:
1. Remove all four tires using a socket set.
2. Inspect each tire for uneven wear and check for proper tread depth.
3. If necessary, rotate the tires according to the manufacturer's recommended pattern.
4. Reinstall the tires, ensuring they are torqued to the specified value (typically 80-100 ft-lbs).

3. Wheel Balancing

Sub-steps:
1. Take the tires to a professional tire shop or use a wheel balancing machine.
2. Balance each wheel and tire assembly, adding weights as necessary.
3. Reinstall the balanced tires on the vehicle.

4. Alignment Adjustment

Sub-steps:
1. After ensuring tires are balanced, take the vehicle to an alignment shop.
2. Have a technician perform a four-wheel alignment, adjusting camber, caster, and toe as needed.
3. Verify alignment specifications match manufacturer recommendations.

5. Suspension Component Inspection and Replacement (if necessary)

Sub-steps:
1. Inspect control arms, bushings, ball joints, and struts for wear.
2. Replace any worn or damaged components with OEM or high-quality aftermarket parts.
3. Reassemble and torque components to manufacturer specifications.