GMC Terrain VVT Solenoid: A Guide for 2010-2024 Models
Understanding common issues and replacement options for your Terrain's VVT solenoids.
- VVT solenoid failure is very common on 2010-2017 GMC Terrains with the 2.4L engine.
- The main cause of failure is dirty or low engine oil, so regular oil changes are critical.
- Symptoms include a Check Engine Light (P0010, P0011, P0013, P0014), rough idle, and poor performance.
- It is highly recommended to replace both the intake and exhaust solenoids at the same time.
Is Your Terrain's Engine Acting Up? It Could Be the VVT Solenoids.
If you own a 2010-2024 GMC Terrain, especially one with the 2.4L Ecotec engine, you might eventually face issues with the Variable Valve Timing (VVT) solenoids. These parts are a common failure point, but the good news is that they are relatively easy and inexpensive to replace. Problems often start with a Check Engine Light and can lead to rough idling, poor acceleration, and reduced gas mileage.
Generation and Engine Differences
The GMC Terrain has used several engines since 2010, but VVT solenoid issues are most widely reported on the first-generation (2010-2017) models equipped with the 2.4L Ecotec engine. These engines were known for oil consumption issues, and dirty or low oil is the number one killer of VVT solenoids. The solenoids have fine mesh screens that get clogged by sludge and debris, causing them to stick or fail. Later generations with 1.5L and 2.0L turbo engines also use VVT solenoids, but the widespread issues are most associated with the earlier 2.4L engine.
Known Issues, Recalls, and Technical Service Bulletins (TSBs)
For 2010-2012 models with the 2.4L engine, GM issued TSB #17-NA-098 for symptoms like rough running, stalling, and DTCs P0010, P0011, P0013, and P0014. The official fix is to replace both camshaft position actuator solenoid valves and ensure the engine's computer (ECM) has the latest software. Additionally, a voluntary emissions recall was issued for some 2011 models for sticking VVT solenoids, which GM dealers would replace and reprogram at no charge.
Choosing the Right Aftermarket VVT Solenoid
When your VVT solenoid fails, you have a choice between Original Equipment (OEM) and aftermarket parts. For the GMC Terrain, ACDelco is the OEM parts supplier. While some mechanics always prefer OEM, many high-quality aftermarket brands offer reliable parts at a lower cost.
- Premium Aftermarket (ACDelco, Standard Motor Products): ACDelco is the original part, offering a direct fit and factory performance. Standard Ignition (SMP) is a well-respected brand known for quality electronic components. These are excellent choices if you want the closest-to-OEM quality.
- Mid-Tier Aftermarket (Dorman, Gates, Cloyes, INA): Brands like Dorman are widely available and often include design improvements over the original part. However, some professional mechanics express mixed opinions on the long-term reliability of aftermarket electronic parts compared to OEM. Gates, Cloyes, and INA are also reputable names in the automotive parts industry.
- Value-Oriented Brands: Many other brands are available that can offer significant savings. For a DIY repair, these can be a good option, especially since the replacement job is not difficult. Many owners have had success with lower-cost kits found online.
Pro Tip: Replace in Pairs
Your Terrain's engine has two VVT solenoids: one for the intake camshaft and one for the exhaust. They are located right next to each other on top of the engine. If one fails, the other has likely experienced the same amount of wear and is probably not far behind. Since the labor to access them is the same, it is highly recommended to replace both solenoids at the same time. Many brands offer them as a kit.
VVT Solenoid Replacement Cost for GMC Terrain
The cost to replace VVT solenoids can vary based on who does the work and the parts you choose. The job is considered easy for a DIYer, requiring only basic tools.
| Item | Estimated Cost |
|---|---|
| New Aftermarket VVT Solenoid (Single) | $27.55 - $91.01 |
| New Aftermarket VVT Solenoid (Pair) | $55 - $180 |
| New OEM (ACDelco) VVT Solenoid (Pair) | $100 - $200 |
| Shop Labor | $80 - $150 |
| Total (DIY) | $55 - $180 |
| Total (Installed at Shop) | $135 - $350 |
Frequently Asked Questions
Which solenoid is for intake and which is for exhaust?
On the popular 2.4L engine, the solenoids are on top of the engine. The one toward the front of the vehicle is for the intake camshaft (often with a gray connector), and the one toward the rear is for the exhaust camshaft (often with a black connector). The connectors are keyed differently so you cannot mix them up.
Can I just clean the VVT solenoids?
Some people try cleaning the solenoids with brake cleaner to remove sludge from the screens. While this might provide a temporary fix, it often doesn't last. Given the low cost of new aftermarket parts and the high failure rate of the originals, replacement is the most reliable solution.
What is the most important thing to prevent VVT solenoid failure?
Regular oil changes with the correct type of oil are the single most important factor. Dirty, sludgy, or low oil is the primary cause of solenoid failure. Keeping up with your Terrain's maintenance schedule is the best way to protect the VVT system and other engine components.
Do I need any special tools to replace the solenoids?
No, the job requires basic hand tools. You'll typically need a flathead screwdriver to remove the air intake duct, a 10mm socket to unbolt the solenoids, and possibly a small pick to help release the electrical connectors. It's a straightforward job that many owners can do themselves in under an hour.
Technical Specifications
OEM Part Numbers: 12655420 12655421 12628347 12646783 12679099 12679100
On the 2.4L engine, the intake and exhaust solenoids are physically identical but have different electrical connectors to prevent incorrect installation. The intake connector is typically gray, and the exhaust connector is black.
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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.
- GMC Terrain:
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- Is Your Terrain's Engine Acting Up? It Could Be the VVT Solenoids.
- Generation and Engine Differences
- Known Issues, Recalls, and Technical Service Bulletins (TSBs)
- Choosing the Right Aftermarket VVT Solenoid
- Pro Tip: Replace in Pairs
- VVT Solenoid Replacement Cost for GMC Terrain
- Frequently Asked Questions
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