my GMC Sierra T1XX (2019-Present) struts are leaking, how do I fix this?

GMC Sierra T1XX (2019-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

523 words

Problem Statement

Learn how to fix leaking struts on your 2019-Present GMC Sierra T1XX. Step-by-step guide with diagnostic steps, tools required, and safety tips.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always use a strut spring compressor to avoid injury during disassembly.
•Ensure the vehicle is securely supported on jack stands before working underneath.

Symptoms

•Fluid leaking from the strut assembly
•Unusual noise while driving over bumps
•Decreased ride comfort
•Vehicle pulling to one side
•Increased stopping distance

Diagnostic Steps

1
Inspect the strut assemblies for visible signs of fluid leakage.
2
Check the strut mounts for wear or damage.
3
Assess the condition of the bushings and other suspension components.
4
Verify alignment settings if there are pulling issues.
5
Perform a bounce test to evaluate strut performance.

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
•Strut spring compressor
•Screwdriver
•Pry bar

Parts Required

•New strut assembly (left and/or right side as needed)
•New strut mounts (if required)
•New sway bar links (if required)

Related Faults

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Solution

1. Preparation

Tools Required: Jack and jack stands, socket set, torque wrench, strut spring compressor, screwdriver, pry bar.
Raise the vehicle using a jack and secure it on jack stands.
Remove the wheel on the side where the strut is leaking.

2. Remove the Strut Assembly

Sub-steps:
1. Disconnect the sway bar link from the strut using a socket.
2. Remove the lower strut bolts by applying torque as needed.
3. Unbolt the upper strut mount from the vehicle's chassis.
4. Carefully remove the strut assembly from the vehicle.

3. Disassemble the Strut

Sub-steps:
1. Use a strut spring compressor to safely compress the spring.
2. Remove the upper strut nut with a socket, and carefully take off the top mount and spring.
3. Inspect all components for wear or damage and replace as necessary.

4. Install New Strut

Sub-steps:
1. Assemble the new strut with the spring and top mount, ensuring proper alignment.
2. Tighten the upper strut nut to the manufacturer’s specified torque (check the service manual).
3. Install the strut assembly back into the vehicle.
4. Secure the upper mount and lower strut bolts, ensuring all are torqued to specifications.

5. Reassemble and Test

Sub-steps:
1. Reconnect the sway bar link.
2. Install the wheel and lower the vehicle.
3. Perform a bounce test to ensure proper strut function.
4. Check the alignment of the vehicle as necessary.