how to tell if my GMC Sierra T1XX (2019-Present) struts are worn out

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

574 words

Problem Statement

Learn how to diagnose and replace worn struts on your 2019-Present GMC Sierra T1XX. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always disconnect the battery before working on electronic components.
•Ensure the vehicle is securely lifted and supported before working underneath it.

Symptoms

•Excessive bouncing or swaying during driving
•Uneven tire wear, particularly on the inner or outer edges
•Increased stopping distance or instability when braking
•Noticeable noise over bumps, such as clunking or knocking sounds
•Vehicle leans to one side during turns
•Difficulty maintaining control on rough or uneven surfaces

Diagnostic Steps

1
Visually inspect the struts for any signs of oil leakage or physical damage.
2
Perform a bounce test by pushing down on each corner of the vehicle and observing how quickly it rebounds.
3
Check for any abnormal tire wear patterns that could indicate suspension issues.
4
Drive the vehicle over a series of bumps and listen for unusual noises emanating from the struts.
5
Conduct a test drive to assess vehicle handling and stability during maneuvers.

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
•Socket set
•Torque wrench
•Strut spring compressor (if necessary)

Parts Required

•Replacement struts (front and/or rear as needed)
•New strut mount and bearing (if applicable)

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Symptoms

•Excessive bouncing or swaying during driving

•Uneven tire wear, particularly on the inner or outer edges

•Increased stopping distance or instability when braking

•Noticeable noise over bumps, such as clunking or knocking sounds

•Vehicle leans to one side during turns

•Difficulty maintaining control on rough or uneven surfaces

Diagnostic Steps

1
Visually inspect the struts for any signs of oil leakage or physical damage.
2
Perform a bounce test by pushing down on each corner of the vehicle and observing how quickly it rebounds.
3
Check for any abnormal tire wear patterns that could indicate suspension issues.
4
Drive the vehicle over a series of bumps and listen for unusual noises emanating from the struts.
5
Conduct a test drive to assess vehicle handling and stability during maneuvers.

Solution

1. Preparation

Gather tools and parts needed for strut replacement.
Ensure the vehicle is parked on a flat surface and the parking brake is engaged.

2. Lift the Vehicle

Use a jack to lift the front or rear of the vehicle, depending on which struts need replacement.
Secure the vehicle with jack stands to ensure safety while working underneath.

3. Remove the Wheel

Use a lug wrench to remove the lug nuts and take off the wheel to access the strut assembly.

4. Disconnect the Strut

Remove the bolts connecting the strut to the lower control arm using a socket set.
Remove the upper strut mount bolts located in the engine compartment or under the dashboard, depending on the strut's position.

5. Replace the Strut

Install the new strut by following the removal steps in reverse order.
Ensure that all bolts are tightened to the manufacturer’s specified torque settings (usually around 50-70 ft-lbs for lower bolts and 30-50 ft-lbs for upper bolts).

6. Reinstall the Wheel

Place the wheel back onto the hub and hand-tighten the lug nuts.
Lower the vehicle back to the ground and use the torque wrench to tighten the lug nuts to the manufacturer's specifications (typically 140-150 ft-lbs).

7. Final Checks

Ensure all tools are removed from the work area.
Test the vehicle to ensure proper handling and performance after the strut replacement.