A Guide to Engine Mounts for the 2007-2014 Chevrolet Silverado 1500
If you're hearing a clunk or feeling a vibration in your Silverado, your engine mounts might be the culprit.
- A 'clunk' on acceleration or a heavy vibration at idle are the most common symptoms of a failed engine mount.
- For best results and longevity, use high-quality ACDelco mounts and replace them in pairs.
- Always transfer the heat shield from the old mount to the new one to prevent premature failure from exhaust heat.
- Be aware of TSB 17-NA-166, which provides a specific procedure for installing new mounts to prevent idle vibration issues.
Is Your Silverado's Engine Mount Failing?
The engine mounts on the 2007-2014 Silverado are known to wear out over time. The rubber can crack and tear, or the fluid inside hydraulic mounts can leak out. The driver-side mount often fails first because of the engine's torque and heat from the exhaust. When a mount fails, the engine can move around more than it should. This can cause noise, vibration, and stress on other parts like the transmission mount and exhaust system.
Common Failure Symptoms
- Clunking Noises: A distinct "clunk" or "thud" sound from the engine bay when you accelerate, decelerate, or shift gears. This is the sound of the engine lifting and settling back down on the broken mount.
- Excessive Vibration: You may feel a strong vibration in the steering wheel or through the floor, especially when the truck is idling in gear at a stoplight.
- Visible Engine Movement: Open the hood and have a helper watch the engine. With your foot firmly on the brake, shift into Drive and briefly rev the engine. If the engine visibly lifts or rocks excessively (more than an inch or two), a mount is likely broken.
Known Issue: TSB 17-NA-166
General Motors released a Technical Service Bulletin (TSB) for a rough idle or vibration in these trucks. It notes that engine mounts can "ground out," transmitting vibration directly to the frame. The fix involves a specific procedure for loosening, settling, and tightening the new mounts to ensure proper alignment. In some cases, mechanics may need to add shims to the mounts. Always make your mechanic aware of this TSB if you're having the mounts replaced.
Choosing the Right Aftermarket Engine Mount
When it comes to engine mounts, quality matters. A cheap mount can fail quickly, leading you to do the job all over again. It is highly recommended to replace both engine mounts at the same time, even if only one is completely broken.
Brand Quality Tiers
- OEM-Grade (ACDelco): ACDelco is GM's official parts brand. These mounts are designed to the original factory specifications and are the safest bet for a long-lasting, quiet repair. They are the most expensive option but provide the best performance and durability.
- Standard Aftermarket (Anchor, DEA, Westar): Brands like Anchor, DEA, and Westar are widely available and more affordable. However, owner experiences found in forums suggest these mounts may not last as long as OEM parts. They can be a good budget option for a truck you don't plan to keep long-term, but be aware that you may be replacing them again sooner than you'd like.
- Other Brands (Pioneer, Skyward): These brands are also available in the aftermarket. Less public feedback is available on their quality, so they may be a gamble compared to more established brands.
Cost of Replacing Silverado Engine Mounts
The cost can vary based on the parts you choose and whether you do the work yourself. Here are some typical costs:
| Item | Estimated Cost |
|---|---|
| New OEM Engine Mounts (Pair) | $250 - $400 |
| New Aftermarket Engine Mounts (Pair) | $80 - $200 |
| Shop Labor | $300 - $600 |
| Total Professional Replacement | $380 - $1000+ |
Frequently Asked Questions
How many engine mounts does my 2007-2014 Silverado have?
Your truck has two main engine mounts (left and right) and one transmission mount that works with them to support the entire powertrain.
Can I replace just the one broken mount?
You can, but it's not recommended. Mounts wear out together. If one has failed, the other is likely weak and will fail soon. Replacing them in pairs ensures proper engine alignment and support.
Is this a difficult job to do myself?
For a DIYer with some experience, it's a manageable job that takes 2-4 hours. It requires a good set of tools, including a floor jack, jack stands, and sockets. The most critical step is safely supporting the engine before unbolting the old mounts. Access can be tight, especially on 4WD models.
Do I need to reuse the old heat shield?
Yes, absolutely. The heat shield protects the new mount's rubber from the intense heat of the exhaust manifold. Forgetting to transfer the heat shield to the new mount will cause it to fail very quickly.
Helpful Videos
Technical Specifications
OEM Part Numbers: 15854941 25841422 15226255
The 2007-2014 Silverado 1500 uses two engine mounts, which are identical for the left and right sides. They are a hydraulic or solid rubber design and must be installed with their original heat shields. The mounting hardware typically consists of 15mm bolts.
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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.
- Chevrolet Silverado 1500: