Chevrolet Colorado Spark Plug Guide: 2014-2024 Aftermarket & OEM
Keep your Colorado's engine running strong by choosing the right spark plugs for your specific engine.
- For best results, use OEM ACDelco Iridium plugs or premium aftermarket equivalents from NGK or Denso.
- The 3.6L V6 engine requires removing the intake manifold for spark plug replacement, increasing labor time and cost.
- Always verify the spark plug gap before installation, even on pre-gapped plugs, to check for shipping damage.
- The 2.8L Duramax diesel engine does not use spark plugs and is not covered by this guide.
Signs of Failing Spark Plugs
Worn spark plugs can cause noticeable problems with your Colorado. If you experience any of these symptoms, it might be time for a replacement.
- Rough Idle: Your truck may shake or vibrate more than usual when stopped.
- Poor Acceleration: The truck feels sluggish or slow to respond when you press the gas pedal.
- Reduced Fuel Economy: You're stopping for gas more often than you used to. A bad plug can decrease MPG by up to 30%.
- Engine Misfires: The engine may hesitate or stumble during acceleration. This can trigger the Check Engine Light with codes like P0300 through P0306.
- Difficulty Starting: The engine cranks but takes longer than normal to start, or fails to start at all.
Choosing the Right Aftermarket Spark Plug
Your 2014-2024 Chevrolet Colorado came with one of three gasoline engines, each requiring a specific type of spark plug. Always choose a plug designed for your engine to ensure proper performance and longevity.
- 2015-2022 2.5L 4-Cylinder (LCV): A reliable, naturally aspirated engine.
- 2015-2022 3.6L V6 (LFX/LGZ): A powerful V6. The LGZ version (2017+) is a significant redesign of the earlier LFX.
- 2023-2024 2.7L Turbo 4-Cylinder (L3B): A modern, high-torque turbocharged engine.
Pro Tip: The 2.8L Duramax diesel engine does not use spark plugs; it uses glow plugs for starting in cold weather. This guide is only for gasoline engines.
Aftermarket Brand Tiers
When shopping for aftermarket spark plugs, quality often aligns with price. Here’s a breakdown of available brands.
Tier 1: OEM & Premium Aftermarket
- ACDelco: As the original equipment manufacturer (OEM) for General Motors, ACDelco plugs are designed specifically for your Colorado's engine. Choosing their Iridium plugs ensures you meet or exceed the original specifications for performance and longevity.
- NGK & Denso: These brands are often the actual manufacturers for OEM parts, including for GM. They are known for exceptional quality and reliability. Their Iridium IX and Iridium TT lines are excellent choices that provide long life and consistent performance.
Tier 2: Reputable Aftermarket
- Bosch: A well-respected German brand with a long history of innovation. Their Double Iridium plugs are a popular and reliable option for many vehicles, including the Colorado.
- Champion & Autolite: These are well-known American brands that offer a good balance of performance and value. They provide a range of plug types from basic copper to long-life iridium.
Tier 3: Value-Oriented
- Skyward: This brand falls into the budget-friendly category. While they may be more affordable, they might not offer the same longevity or consistent performance as premium brands. They can be a suitable choice for those on a tight budget, but expect a shorter replacement interval.
A Note on Direct Injection Engines: The 3.6L V6 and 2.7L Turbo engines use direct injection. This technology can lead to carbon buildup on intake valves over time, which is unrelated to spark plug function but can cause similar symptoms like rough idle and reduced performance. Using high-quality fuel and adhering to maintenance schedules is crucial.
Cost of Spark Plug Replacement
| Item | Cost |
|---|---|
| Aftermarket Spark Plugs (DIY) | $25 - $135 (for a set of 4 or 6) |
| Shop Labor Cost | $250 - $450+ |
| Total Professional Replacement | $406 - $550+ |
Note: Labor costs for the 3.6L V6 are higher because the intake manifold must be removed to access the rear spark plugs.
Frequently Asked Questions
How often should I change my Colorado's spark plugs?
For modern Iridium plugs, which are standard on most Colorado engines, the recommended interval is typically between 60,000 and 100,000 miles. However, always check your owner's manual for the specific interval for your truck's year and engine.
Do I need to gap new spark plugs?
Most premium Iridium and Platinum spark plugs from brands like ACDelco and NGK come pre-gapped from the factory. It is still a best practice to verify the gap with a feeler gauge before installation to ensure none were damaged in shipping. Do not use a coin-style gapper on fine-wire iridium plugs, as it can damage the delicate electrode.
What's the difference between Iridium, Platinum, and Copper plugs?
Iridium and Platinum are precious metals with very high melting points, making them ideal for long-lasting, fine-wire electrodes that provide a consistent spark for up to 100,000 miles. Copper plugs have a larger electrode and wear out much faster (typically 20,000-30,000 miles) but are excellent conductors. Modern engines like those in the Colorado are designed for Iridium or Platinum plugs.
Can I use a cheaper plug than the recommended Iridium type?
While you might find a copper or standard platinum plug that fits, it's not recommended. Your Colorado's ignition system is calibrated for the electrical resistance and performance characteristics of a long-life Iridium plug. Using a different type can lead to reduced performance, poor fuel economy, and a much shorter service life.
Helpful Videos
![How To Replace Spark Plugs | 2015-2016 Chevrolet Colorado V6 3.6L | Part Numbers Included [DY]](https://img.youtube.com/vi/lJU4bikt3Zc/mqdefault.jpg)
Technical Specifications
OEM Part Numbers: 12688094 12646780 12627160
Engine compatibility is key. The 2.5L I4, 3.6L V6, and 2.7L Turbo engines all use different spark plugs. Most OEM and quality aftermarket plugs are Iridium type. For the 3.6L V6 (2017+), use ACDelco 12646780. For the 2.7L Turbo (2023+), use ACDelco 12688094. For the 2.5L I4 (2015-2022), use ACDelco 12627160 (or 41-115).
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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.
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