A Guide to Engine Mounts for the 2007-2017 GMC Acadia
Stop the excessive vibration and clunking noises by understanding and choosing the right engine mounts for your Acadia.
- The front hydraulic mount is the most common failure point on the 2007-2017 Acadia, often identified by leaking fluid and heavy vibration at idle.
- Budget aftermarket brands like Anchor, DEA, and Westar have a widespread reputation for poor fit, causing vibration, and failing quickly.
- Replacing only the front mount is a feasible DIY job, but replacing the rear and transmission mounts is much more complex and may require lowering the subframe.
- Always inspect all four mounts; a single new mount can put extra stress on the other old ones, causing them to fail sooner.
Symptoms of a Failing Engine Mount on a GMC Acadia
When an engine mount fails on your Acadia, the signs are usually easy to notice. Because the front mount is a fluid-filled hydraulic design, it is often the first to fail and may show signs of leaking oil. Look for these common symptoms:
- Excessive Vibration: This is the most common sign. You'll feel a strong vibration through the steering wheel, floor, or dashboard, especially when the SUV is idling in Drive or Reverse.
- Clunking or Thumping Noises: A loud 'clunk' or 'thud' from the engine bay when you shift from Park to Drive, accelerate, or decelerate is a classic symptom. This is the sound of the engine moving too much and hitting other parts. 🎬 Watch: Hear the classic clunking sound of a failed mount
- Visible Engine Movement: Open the hood and have a helper safely rev the engine briefly while in Park. If you see the engine rock or lift excessively, one or more mounts are likely bad.
Known Issue: Early Model Year Recall
Early examples of the GMC Acadia were recalled because the original engine mounts were built without drain holes. This could cause water to collect inside the mount, leading to premature failure. If you have an early model, it's worth checking if this recall was performed.
Choosing the Right Aftermarket Engine Mount
When shopping for new engine mounts, you'll find a big difference in quality and price between OEM and aftermarket options. Making the right choice is critical for this repair.
Brand Quality Tiers
Tier 1: OEM (ACDelco GM Original Equipment)
ACDelco is GM's official parts brand. Their OEM mounts are specifically designed for the Acadia's weight and engine vibrations. They often use fluid-filled hydraulic designs to provide the smoothest performance. While they are the most expensive option, they offer the best chance of a long-lasting repair without new vibration issues.
Tier 2: Aftermarket Economy Brands (Anchor, DEA, Westar)
Brands like Anchor, DEA, and Westar offer a much lower price point. However, extensive feedback from mechanics and vehicle owners suggests caution. These mounts often use solid, harder rubber instead of the OEM hydraulic design. This can result in a failure to properly dampen vibrations, sometimes making the ride feel worse than it did with the old, broken mount. Forum discussions frequently mention these brands having a very short lifespan, sometimes failing within a few months, requiring the job to be done all over again.
How Many Mounts Does a 2007-2017 Acadia Have?
The 2007-2017 Acadia has a total of four mounts that secure the engine and transmission.
- Front Engine Mount: A hydraulic mount located under the oil filter. 🎬 See this step-by-step front engine mount replacement walkthrough This is the most common mount to fail.
- Rear Engine Mount: Located near the firewall.
- Transmission Mount: Secures the transmission side of the powertrain.
- Upper Torque Strut Mount: Often called a 'dog bone' mount, it's located at the top of the engine and controls twisting forces. 🎬 Watch: How to easily replace the upper torque strut mount
Cost to Replace GMC Acadia Engine Mounts
The cost can vary widely depending on which mounts are replaced and whether you do the work yourself. The front mount is the most commonly replaced.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Mount (Single) | $47 - $155 |
| New OEM Mount (Single) | $150 - $250+ |
| Shop Labor (Front Mount Only) | $150 - $300 |
| Shop Labor (All Mounts) | $500 - $800+ |
Frequently Asked Questions
Can I replace just one bad engine mount?
Yes, you can replace only the failed mount. However, engine mounts wear out together. A new, stiff mount can put extra stress on the remaining old, worn mounts, causing them to fail sooner. It's best to replace them as a set or at least inspect all of them carefully.
Which engine mount fails most often on the Acadia?
The front engine mount is the most common point of failure on the 2007-2017 Acadia. It is a hydraulic mount that can leak its internal fluid, leading to collapse and severe vibration.
Is replacing the engine mounts a DIY job?
It depends on the mount. The front mount and the upper torque strut are manageable for an experienced DIYer with the right tools, including a floor jack to support the engine. The rear and transmission mounts are much more difficult as they may require lowering the vehicle's subframe to gain access.
What is a hydraulic engine mount?
A hydraulic mount is a special type of mount filled with fluid. This design is much better at absorbing a wide range of engine vibrations than a simple block of solid rubber. The front mount on your Acadia is hydraulic, which is why choosing a quality replacement is important to maintain a smooth ride.
Helpful Videos
Technical Specifications
OEM Part Numbers: 25840450 25759455 84175579
The powertrain is supported by four mounts in total: one front hydraulic mount, one rear mount, one transmission mount, and one upper torque strut mount. The front mount is fluid-filled and the most common to fail. Bolt sizes are typically 15mm and 18mm.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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