GMC Yukon Engine Mount Guide: Understanding Failures and Replacements (2015-2024)
If your Yukon vibrates at stoplights or clunks on acceleration, a bad engine mount is the likely cause.
- Vibration at idle is the #1 symptom of a bad mount; check TSB 17-NA-166 if this is your issue.
- For this vehicle, OEM (ACDelco) hydraulic mounts are strongly recommended over budget solid rubber aftermarket brands to avoid vibration problems.
- The driver's side mount fails most often, but consider replacing both if your vehicle has high mileage.
- Owners of 2021-2024 Yukons with the 6.2L V8 should first check for the serious engine failure recall (N252494000).
Is Your GMC Yukon Shaking? Signs of a Bad Engine Mount
A failing engine mount makes its presence known through noise and vibration. Because the driver's side mount often fails first due to engine rotation, you might notice these symptoms get worse when you accelerate. Pay attention to these common signs:
- Vibration at Idle: This is the most common complaint. You'll feel a noticeable vibration through the steering wheel, seats, or floorboards, especially when the transmission is in Drive and you're stopped at a light.
- Clunking or Thumping Noises: Loud clunks from the engine bay when you accelerate, decelerate, or shift gears often mean the engine is moving excessively and hitting other components.
- Visible Engine Movement: If you have a helper rev the engine while the hood is open and the vehicle is in Park, you might see the engine lift or rock significantly. This is a clear sign of a broken mount. 🎬 Watch: How to diagnose bad motor mounts in your vehicle
- Rough Ride: A general sense that the ride is harsher than it used to be can also be a symptom, as the failed mount is no longer damping vibrations.
Known Issue: Vibration at Idle (TSB 17-NA-166)
General Motors issued a Technical Service Bulletin for 2015-2019 Yukons (and related trucks) that experience a rough idle or vibration specifically when stopped in Drive. This issue is caused by an internal "ground out" within the factory engine mounts. GM released an updated mount design to fix this. If you have this specific symptom, ensure your mechanic is aware of this TSB, as there is a specific procedure for installing and "settling" the new mounts to prevent the vibration from returning.
🎬 See this 2015-2020 motor mount replacement walkthroughChoosing a Replacement: OEM vs. Aftermarket for the Yukon
When it comes to engine mounts for your Yukon, the quality difference between Original Equipment (OEM) and budget aftermarket parts is significant. The general consensus among mechanics and owners is to avoid the cheapest options.
- OEM (ACDelco): These are typically hydraulic, fluid-filled mounts designed specifically to absorb the vibrations of your Yukon's V8 engine. They provide the smoothest performance and are the recommended choice for longevity and avoiding vibration issues, despite their higher cost.
- Aftermarket (Anchor, DEA, Westar): These brands are much cheaper but are almost always made of solid rubber, not hydraulic. Forum discussions are filled with owners who installed these parts only to experience immediate, and often worse, vibrations than the old, failed part. Poor fitment and very short service life are also common complaints, often leading to doing the job twice.
Pro Tip: While saving money is tempting, the labor cost to replace an engine mount is significant. Installing a cheap part that fails in a year or causes constant vibration will cost you more in the long run. For this specific part on this specific vehicle, investing in an OEM mount is the most reliable path.
Important Recall Notice for 2021-2024 6.2L V8 Engines
There is a major safety recall (NHTSA ID: 25V274, GM No: N252494000) for some 2021-2024 Yukons with the 6.2L V8 engine due to internal defects that can cause complete engine failure and a loss of power while driving. While this is not an engine mount problem, the consequences are severe. Before diagnosing mount issues, owners of these vehicles should contact a GM dealer or use the NHTSA website to see if their vehicle is affected by this recall.
GMC Yukon Engine Mount Replacement Cost
The cost to replace an engine mount is mostly labor. The part itself can be relatively inexpensive, but accessing it requires supporting the engine and can be time-consuming.
| Part Type | Estimated Part Cost | Estimated Labor Cost |
|---|---|---|
| New Aftermarket (Value Brands) | $72 - $113 | $396 - $581 |
| New OEM (ACDelco) | $172 - $195 |
Frequently Asked Questions (FAQ)
Why does my new aftermarket engine mount vibrate so much?
This is a very common problem. The original Yukon mounts are often hydraulic (fluid-filled) to absorb vibration. Most budget aftermarket mounts from brands like Anchor, DEA, or Westar are made of a harder, solid rubber that does not dampen vibration as well, leading to a rough feeling in the cabin, especially at idle.
Can I replace just one engine mount?
Yes, and it's common to do so, as the driver's side mount often fails first. However, if one mount has failed due to age and mileage, the other is likely not far behind. If you are paying for the labor, it can be cost-effective to replace them in pairs.
Is replacing a Yukon engine mount a DIY job?
For an experienced DIY mechanic, this is a manageable job. 🎬 Watch: Driver side motor mount replacement for 2007-2013 models It requires a strong floor jack, jack stands, and a block of wood to safely lift and support the engine. You will also need a good set of sockets, extensions, and a torque wrench. For beginners, the risk of improperly supporting the engine makes this a job best left to a professional.
What is the difference between the left and right engine mounts?
The left (driver's side) and right (passenger's side) mounts are often different parts with unique part numbers. They are designed to handle different forces. Always verify you are ordering the correct mount for the side you are replacing.
Helpful Videos
Technical Specifications
OEM Part Numbers: 22932198 84339908 23312938
The GMC Yukon in this generation primarily uses hydraulic (fluid-filled) engine mounts from the factory to ensure a smooth ride by damping V8 engine vibrations. Aftermarket replacements are often solid rubber, which can increase felt vibration.
We Have This Part in Stock
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.
- GMC Yukon: