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Front end clunking noise on my 2020 Sierra 1500 AT4

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Mark S. · rep 0 · May 22, 3:41 AM · 1 replies · solved · Question

Vehicle: 2020 GMC Sierra 1500 AT4

Hey everyone,

I've been noticing a persistent clunking noise coming from the front end of my 2020 GMC Sierra 1500 AT4. It's most noticeable when I go over speed bumps or uneven pavement, especially at lower speeds. It sounds like something is loose.

I've checked for anything obviously hanging or loose, but I can't pinpoint it. The truck has about 60,000 miles on it now. Could this be a common issue with these trucks? It's starting to get pretty annoying.

Any ideas on what I should be looking for or if this is something I need to take to a shop immediately? Thanks for any help!

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 3:41 AM

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ClearTheCode admin answer:

A clunking noise from the front suspension of your 2020 GMC Sierra 1500 AT4 is a common complaint and can stem from several components. Given your mileage, wear and tear are definitely factors.

Common Causes:

  1. Sway Bar End Links: These are a very common culprit. The bushings or ball joints on the end links can wear out, causing a clunking sound, especially over bumps or when turning.
  2. Control Arm Bushings: Both upper and lower control arm bushings can deteriorate over time, leading to metal-on-metal contact or excessive play.
  3. Ball Joints: Worn upper or lower ball joints can also produce clunking noises and are critical for steering and suspension integrity.
  4. Struts/Shocks: While less common for a clunk, a failing strut or its mounting hardware (like the strut mount bearing) can sometimes cause noise.
  5. Tie Rod Ends: Inner or outer tie rod ends with excessive play can also contribute to front-end noise and affect steering.

What to Do:

  1. Visual Inspection: Park on a level surface and visually inspect the sway bar links, control arm bushings, and tie rod ends for any obvious signs of wear, cracks, or looseness. You might need to jack up the front end to check for play in the wheels.
  2. Bounce Test: Push down firmly on each corner of the front end and release. If the truck bounces more than 2-3 times, your struts might be weakening.
  3. Listen Carefully: Try to have a friend drive slowly over a speed bump while you listen from outside to pinpoint the general area of the noise.

When to See a Shop:

It's highly recommended to have a professional mechanic inspect your suspension as soon as possible. Worn suspension components can compromise handling, braking, and tire wear, and in severe cases, lead to dangerous failures. A shop can properly diagnose the exact cause using specialized tools and techniques, ensuring your AT4 remains safe and performs as it should. They can also check for any related issues that might not be immediately obvious.

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