Choosing the Right Spark Plugs for Your 2014-2017 Chevrolet SS
Keep your 6.2L LS3 V8 running strong with the correct spark plugs for optimal performance and longevity.
- Stick with Iridium-tip spark plugs from brands like ACDelco, NGK, or Denso for the best performance and 100,000-mile longevity.
- Common signs of failure include a rough idle, engine misfires (Check Engine Light), and decreased gas mileage.
- While the job is DIY-friendly, always check the gap on new plugs before installation, even if they are pre-gapped.
- There are no major recalls or TSBs for spark plugs on the SS; standard wear is the primary reason for replacement.
Signs of Failing Spark Plugs
When spark plugs wear out, they can't create a strong enough spark. This leads to noticeable problems. You might feel a rough idle, engine hesitation when you accelerate, or a general loss of power. A check engine light is also a common sign, often with codes indicating a misfire (like P0300 for random misfires, or P0301-P0308 for specific cylinders). 🎬 See how to diagnose a P0300 misfire on the LS3 engine You may also notice your fuel economy getting worse.
Choosing Aftermarket Spark Plugs for Your SS
The 2014-2017 Chevrolet SS came from the factory with high-quality ACDelco Iridium spark plugs, typically part number 41-110. These are long-life plugs designed to last up to 100,000 miles. When shopping for aftermarket replacements, it's important to choose a plug that meets or exceeds the original specifications.
Brand Quality Tiers for Chevrolet SS
| Tier | Brands | Description |
|---|---|---|
| OEM Equivalent / Premium Aftermarket | ACDelco, NGK, Denso | ACDelco is the original equipment manufacturer, offering a direct replacement for guaranteed performance. NGK and Denso are highly respected Japanese brands known for excellent quality and are often considered equivalent or even an upgrade to OEM. Many owners choose NGK Iridium plugs (like the TR55IX or TR5IX) as a reliable alternative. |
| Quality Aftermarket | Bosch, Autolite | Bosch offers innovative plugs like their double iridium series, which are a solid choice. Autolite's Iridium XP plugs are also a popular and well-regarded option that provides long service life and good performance. These brands offer a great balance of price and quality. |
| Standard / Economy | Champion, Standard Copper Plugs | Champion is a long-standing brand that provides reliable, budget-friendly options. While less expensive copper plugs (like some NGK V-Power models) can work, they have a much shorter lifespan (around 30,000 miles) compared to the 100,000-mile interval of iridium plugs and are not recommended for the LS3 unless you plan on frequent changes. |
Pro Tip: Iridium is Worth It
For the LS3 engine in your SS, sticking with iridium spark plugs is the best choice. While cheaper copper or platinum plugs are available, iridium offers the best combination of performance, longevity, and fuel efficiency, matching the original design intent for your vehicle. The small extra cost upfront is offset by the 100,000-mile replacement interval.
Known Issues, Recalls, and Service Bulletins
There are no specific recalls or widespread Technical Service Bulletins (TSBs) for spark plugs on the 2014-2017 Chevrolet SS. The ignition system is generally reliable. Most reported issues, like misfires, are typically resolved with a standard replacement of plugs and sometimes wires 🎬 Watch: Step-by-step guide to changing spark plugs on your Chevy SS, especially on higher-mileage vehicles. There were significant recalls for other GM models related to ignition switches, but these did not apply to the Chevrolet SS.
Frequently Asked Questions (FAQ)
What is the recommended spark plug gap for the Chevy SS?
The factory ACDelco iridium plugs typically come pre-gapped at 0.040 inches. While most high-quality aftermarket plugs come pre-gapped, it is always a good practice to verify the gap with a feeler gauge before installation and adjust if necessary.
How often should I change the spark plugs on my 2014-2017 Chevy SS?
The manufacturer's recommended service interval for the original iridium spark plugs is every 100,000 miles under normal driving conditions. If you use standard copper plugs, you will need to replace them much more frequently, around every 30,000 miles.
Should I replace my spark plug wires at the same time?
It's a good idea, especially if your vehicle has over 100,000 miles or if the wires are original. Spark plug wires can degrade over time, leading to weak spark and misfires. Replacing them with the plugs ensures the entire ignition system is refreshed.
What's the difference between Iridium, Platinum, and Copper plugs?
The main difference is the material of the center electrode, which affects performance and lifespan. Copper is a great conductor but wears out the fastest (20k-30k miles). Platinum lasts longer (60k-100k miles). Iridium is the hardest and most durable, offering the longest life (100k+ miles) and most consistent performance, which is why it's the OEM choice for the SS.
Helpful Videos
Technical Specifications
OEM Part Numbers: 41-110
Engine: 6.2L LS3 V8 Quantity: 8 spark plugs required OEM Material: Iridium Gap Size: 0.040 in (1.0mm) Hex Size: 5/8 in
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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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