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2017 Acadia SLT - Front End Clunking Noise Over Bumps

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James R. · rep 0 · May 22, 3:41 AM · 1 replies · solved · Question

Vehicle: 2017 GMC Acadia SLT

Hi all, I'm hoping someone can help me diagnose a persistent clunking noise coming from the front end of my 2017 GMC Acadia SLT. It's most noticeable when I go over speed bumps, potholes, or any uneven road surface, especially at lower speeds.

The sound is a distinct 'clunk' or 'thud' and seems to be coming from both sides of the front suspension. It's not constant, only when the suspension articulates. I've checked for anything obvious like loose items under the hood, but haven't found anything.

Could this be sway bar links, control arm bushings, or something else entirely? The car drives fine otherwise, but the noise is really annoying. Any ideas on what to look for or common issues with the Acadia?

✓ Accepted solution

ClearTheCode Admin

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

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ClearTheCode admin answer:

The clunking noise you're hearing from the front end of your 2017 GMC Acadia SLT over bumps is a very common complaint and typically points to worn suspension components. Given the age and mileage, several parts could be the culprit.

Here are the most likely causes:

  1. Sway Bar End Links: These are a very common failure point. The ball joints or bushings in the end links wear out, causing metal-on-metal contact and a clunking sound, especially over uneven surfaces or when turning slowly.
  2. Lower Control Arm Bushings: The rubber bushings that connect the lower control arms to the subframe can degrade and crack over time. When they wear out, the control arm can shift slightly, causing a clunk.
  3. Ball Joints: Both upper and lower ball joints can wear out, leading to play in the suspension and a clunking noise. This can also affect steering precision.
  4. Strut Mounts/Bearings: The top mounts of the front struts contain rubber bushings and a bearing. If these wear out, they can produce a clunking or popping sound, especially when turning the steering wheel or going over bumps.
  5. Tie Rod Ends: Inner or outer tie rod ends can develop play, leading to clunking and loose steering feel.

When to See a Shop:

  • Soon: While a clunking noise might seem minor, worn suspension components can affect handling, tire wear, and potentially lead to more significant safety issues if they fail completely. It's best to have it inspected promptly.
  • Diagnosis: A professional technician will lift the vehicle and perform a thorough inspection of all front suspension components. They will check for play in ball joints, tie rods, and wheel bearings, and visually inspect bushings for cracks or tears. They can also use a pry bar to articulate components and pinpoint the source of the noise. There are typically no OBD codes associated with mechanical suspension noises unless it's an active suspension system with sensor faults, which is not the case for this type of clunk.
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