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GMC Terrain 2010-2020 Engine Timing Chain Kit: A Mechanic's Guide

Don't let a rattling timing chain lead to catastrophic engine failure in your Terrain; here's what you need to know.

4 minutes to read 2010-2020 GMC Terrain
Difficulty
5/5
Est. Time
8 hrs
DIY Doable?
🔧 Shop
Shop Labor
$1000-$1500
🚫 Do not drive — Driving with a failing timing chain is not recommended, as a complete failure can cause the pistons to hit the valves, resulting in catastrophic and expensive engine damage.
Key Takeaways
  • The 2.4L engine in 2010-2017 Terrains is highly prone to timing chain failure; using a high-quality aftermarket kit is crucial.
  • Symptoms like engine rattle or a check engine light with codes P0016/P0017 should be addressed immediately to avoid severe engine damage.
  • This is a labor-intensive repair not suitable for DIY. Factor in significant labor costs when budgeting for the replacement.
  • Maintaining proper oil level and using the correct oil viscosity is the best way to prolong the life of your new timing chain.
The engine timing chain in your GMC Terrain is critical for keeping the engine running. It acts like a bicycle chain, connecting the engine's crankshaft and camshafts. This synchronization is essential because it controls the opening and closing of the engine's valves, allowing air and fuel in and exhaust out at the perfect moment. If this timing is off, the engine can run poorly or even suffer severe damage. The timing chain kit includes the chain, guides to keep it from slapping around, a tensioner to maintain tightness, and gears (sprockets).

Understanding the GMC Terrain Timing Chain

Engine bay of a GMC Terrain showing the location of the 2.4L Ecotec timing chain assembly.
The 2.4L Ecotec engine in first-generation GMC Terrains is the most common version to experience timing chain issues.
A professional mechanic working on a complex engine timing chain replacement.
Labor costs for timing chain replacement are significant due to the complexity and time required to access the timing assembly.

The timing chain is designed to last a long time, but certain engines in the 2010-2020 GMC Terrain are known for premature timing chain issues. This is especially true for the first-generation Terrain (2010-2017) equipped with the 2.4L Ecotec engine. These engines are known for problems with stretched timing chains, often related to excessive oil consumption or issues with the chain tensioner. The second-generation Terrain (2018-2020) uses different engines, like the 1.5L and 2.0L turbo, which have not shown the same widespread issues but still require attention.

Known Issues: 2.4L Ecotec Engine (2010-2017)

The 2.4L engine is particularly susceptible to timing chain problems. A key cause is excessive oil consumption, which can starve the chain and tensioners of the lubrication they need to function correctly. GM issued a Special Coverage Adjustment (TSB 12313C) for some 2010-2011 models due to a balance chain that could stretch and make noise. If left untreated, a stretched or broken chain can lead to severe engine damage. Regular oil changes every 3,000 miles are strongly recommended for these engines to prolong the life of all components.

Choosing the Right Aftermarket Timing Chain Kit

A complete premium aftermarket timing chain kit including chains, tensioners, and guides.
A complete aftermarket timing chain kit from premium brands like Cloyes often includes all necessary guides and tensioners for a reliable repair.

When replacing the timing chain, you must choose between an OEM part from the dealer and an aftermarket part. For the GMC Terrain, especially the 2.4L models, a high-quality aftermarket kit can be a smart choice. These kits often meet or exceed original specifications and can be more affordable.

Brand Quality Tiers

  • Premium / OEM-Equivalent (Best Choice): Brands like Cloyes and INA are top-tier choices. Cloyes is a major name in timing components, supplying both automakers and the aftermarket, and is known for high-quality, durable kits. Many professional mechanics trust and use their products.
  • Quality Aftermarket (Good Choice): Brands like Gates and Dayco offer reliable, quality kits that provide good value. They are well-respected in the industry and are a solid option for a dependable repair.

Pro Tip: When performing this repair, it's wise to get a complete kit. These kits usually include the primary timing chain, balance shaft chain, all guides, tensioners, and sprockets. It is also a good time to replace the water pump if it is driven by the timing chain, 🎬 Watch: The easier way to replace the Ecotec 2.4L water pump. as well as the variable valve timing (VVT) solenoids, which are another common failure point.

Cost of Replacing a GMC Terrain Timing Chain Kit

Part Type Estimated Cost
New Aftermarket Kit $87 - $930
Shop Labor $1000 - $1500
Total Estimated Cost $1087 - $2430
Note: Prices are estimates and can vary based on location, vehicle engine, and the specific parts included in the kit. The provided aftermarket price range is based on our inventory.

Frequently Asked Questions (FAQ)

Comparison showing a healthy, tight timing chain versus a failed, stretched timing chain with visible slack.
A healthy timing chain (left) should be tight with no slack, while a failed chain (right) will stretch and cause rattling or timing errors.
What are the main symptoms of a bad timing chain on a GMC Terrain?

The most common symptoms are a rattling or ticking noise from the engine, especially on a cold start. 🎬 Watch: Hear what a rattling timing chain sounds like on startup. You may also experience a check engine light with codes like P0016 or P0017 (cam/crank correlation errors), engine misfires, and rough idling. In severe cases, you might find metal shavings in the engine oil during an oil change.

Is replacing the timing chain a DIY job?

No, this is not recommended for beginners. Replacing a timing chain is a complex and labor-intensive job that requires special tools and significant mechanical knowledge. 🎬 See this step-by-step walkthrough of the timing and balance chain replacement. Mistakes during installation can lead to catastrophic engine failure. It is best left to an experienced mechanic.

How does engine oil affect the timing chain?

Engine oil is critical for the timing chain system. It lubricates the chain and provides hydraulic pressure for the tensioner, which keeps the chain tight. Low or dirty oil can cause the chain guides to wear out, the tensioner to fail, and the chain itself to stretch, leading to failure. This is a major issue in the 2.4L Ecotec engines.

Should I replace just the chain or the whole kit?

Always replace the entire kit. The chain, guides, and tensioners all wear together. Replacing only the chain means you are putting a new part into a system with worn components, which will cause the new chain to fail prematurely. A complete kit ensures all parts are fresh and designed to work together.

Are there any recalls for the GMC Terrain timing chain?

There are no direct safety recalls for the timing chain itself across all 2010-2020 models. However, GM did issue Special Coverage Adjustment #12313C for the balance shaft chain on some 2010-2011 Terrains with the 2.4L engine, which extended the warranty for that specific part to 10 years or 120,000 miles. Always check with a dealer using your VIN to see if any special coverages apply to your vehicle.

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2012 GMC Terrain Engine rattle noise on start up, cold start, Stretched timing chain, Timing codes
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Technical Specifications

OEM Part Numbers: 12680750 12635447 94201S

Kits vary by engine (2.4L I4, 3.0L V6, 3.6L V6, 1.5L Turbo, 2.0L Turbo). A complete kit for the 2.4L engine typically includes a primary timing chain, balance shaft chain, multiple guides, two tensioners, and associated sprockets.

Wrenchy
Article researched & written by
Wrenchy
Go-Parts' AI research assistant. Every article is backed by live web research, verified OEM data, and real technician knowledge — so you get accurate, up-to-date information you can trust.
Meet Wrenchy → Updated May 31, 2026

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.

Year Coverage
This article covers the Engine Timing Chain Kit for:
  • GMC Terrain: 20102011201220132014201520162017201820192020
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