A Guide to Spark Plug Replacement for the 2014-2024 GMC Canyon
Understand the right spark plugs for your Canyon's engine to maintain performance and prevent issues.
- Confirm your Canyon's engine (2.5L, 3.6L, or 2.7L) before buying, as spark plugs and replacement difficulty are engine-specific.
- The 2.8L Duramax diesel engine uses glow plugs, not spark plugs.
- For the 3.6L V6 (2015-2022), be aware of a TSB regarding potential oil/coolant leaks into spark plug tubes causing misfires.
- Using Iridium spark plugs from OEM (ACDelco) or top aftermarket brands (NGK, Denso) is recommended for longevity and performance.
Engine-Specific Spark Plug Needs
Choosing the right spark plug for your 2014-2024 GMC Canyon depends entirely on the engine your truck is equipped with. The three primary gasoline engines have different requirements and replacement procedures.
- 2.5L 4-Cylinder (2015-2022): This engine is the most straightforward. The spark plugs are easily accessible, making replacement a relatively simple job. 🎬 Watch this step-by-step guide for 2.5L spark plug replacement.
- 3.6L V6 (2015-2022): This engine requires more labor. To access the rear bank of three spark plugs, the upper intake manifold must be removed. This adds time and complexity to the job. 🎬 See how to remove the intake manifold on V6 models.
- 2.7L Turbo 4-Cylinder (2023-2024): Found in the newer generation, the spark plugs on this engine are located under a cover but are generally accessible without major disassembly.
Diesel Engine Warning
The 2.8L Duramax Turbo-Diesel engine does NOT use spark plugs. It uses glow plugs for starting assistance. Do not purchase spark plugs for a diesel Canyon.
OEM vs. Aftermarket Spark Plugs
Your Canyon came from the factory with ACDelco Iridium spark plugs. ACDelco is GM's official parts brand, and their plugs are an excellent choice for guaranteed compatibility and performance. However, high-quality aftermarket brands often meet or exceed OEM standards.
- Top-Tier Aftermarket (NGK, Denso): These brands are global leaders and often the actual manufacturer behind the ACDelco-branded plugs. Choosing an NGK or Denso Iridium plug is equivalent to, and sometimes better than, the OEM part.
- Quality Aftermarket (Bosch): Bosch is another top-tier manufacturer that produces high-quality Iridium and Platinum plugs that are a reliable choice for the Canyon.
- Standard Aftermarket (Autolite, Champion): These brands offer dependable plugs that are often more budget-friendly. While they may not have the same longevity as Iridium plugs, they are a solid option for regular maintenance intervals.
- Economy Brands (Skyward): These are basic replacement plugs that meet minimum requirements and are the most affordable option.
Pro Tip: Stick with Iridium
For the best performance and longest service life, it is highly recommended to use Iridium spark plugs. They provide a stronger, more consistent spark and have a much higher melting point, making them more durable than Platinum or Copper alternatives, which is ideal for modern engines.
Known Issues: 3.6L V6 Oil & Coolant Leaks
A Technical Service Bulletin (TSB 21-NA-147) was issued for 2015-2022 GMC Canyon models with the 3.6L V6 engine. This TSB notes that oil or coolant can leak into the spark plug tubes due to porous spots in the cylinder head created during manufacturing. This can cause the check engine light to come on and create engine misfires. If oil or coolant is found on the spark plug or inside the ignition coil boot, this TSB indicates the cylinder head may need to be replaced.
| Item | Estimated Cost |
|---|---|
| Aftermarket Spark Plugs (per plug) | $4.09 - $22.45 |
| OEM ACDelco Iridium Spark Plugs (per plug) | $9.00 - $19.00 |
| Shop Labor (2.5L / 2.7L) | $100 - $200 |
| Shop Labor (3.6L V6) | 🎬 Follow this professional walkthrough for changing 3.6L V6 spark plugs.$250 - $500+ |
Frequently Asked Questions (FAQ)
How often should I change the spark plugs on my GMC Canyon?
For the original Iridium plugs, the recommended replacement interval is typically between 60,000 and 100,000 miles. However, if you experience symptoms of failure, they should be inspected and replaced sooner.
Do I need to gap the new spark plugs before installing them?
Most high-quality Iridium and Platinum spark plugs come pre-gapped from the factory. However, it is always a best practice to verify the gap with a feeler gauge before installation, as they can be mishandled during shipping. Do not use a coin-style gapper on fine-wire Iridium plugs, as it can damage the delicate electrode.
What is the difference between Iridium, Platinum, and Copper plugs?
Iridium is the strongest and most durable material, offering the longest life and most consistent performance; it is the OEM standard for the Canyon. Platinum is a good mid-grade option, lasting longer than copper but not as long as Iridium. Copper plugs have excellent conductivity but wear out the fastest and are generally not recommended for modern ignition systems like those in the Canyon.
Can I replace just one bad spark plug?
While you can replace just one, it is highly recommended to replace all spark plugs at the same time. Plugs wear at a similar rate, so if one has failed, the others are likely near the end of their service life. Replacing them as a set ensures balanced engine performance and prevents you from having to repeat the labor soon after.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12622561 41-109 12681660 12688094 41-106IP
The most important specifications are the material (Iridium is OEM standard), the heat range, and the thread size/reach. Always buy plugs listed as a direct fit for your specific year and engine to ensure these specifications are correct. Most plugs for the Canyon use a 5/8" or 9/16" socket.
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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 Canyon: