Chevrolet Silverado 1500 (2015-2024) Ignition Coil Guide
Fix engine misfires and rough idling on your Silverado by learning how to choose and replace a faulty ignition coil.
- A bad coil typically causes a P030X check engine light code, a rough idle, and hesitation when accelerating.
- Replacement is an easy DIY task with a 10mm socket, usually taking less than 30 minutes per coil.
- For reliability, choose premium aftermarket brands like Delphi or NGK; they are often the original equipment supplier.
- Always consider replacing spark plugs at the same time to ensure a complete ignition system tune-up.
Is Your Silverado's Ignition Coil Failing?
A bad ignition coil on a 2015-2024 Silverado is a common issue that can mimic other problems, like a bad transmission. Symptoms often start small but can worsen, impacting your truck's performance and fuel economy. Ignoring them can lead to damage to your catalytic converter over time.
Key Failure Symptoms:
- Check Engine Light: This is the most common sign. A scanner will typically show a code from P0300 (Random Misfire) to P0308 (Cylinder 8 Misfire), pinpointing the problem cylinder.
- Rough Idle and Shaking: Your truck may shake or vibrate more than usual when stopped at a light. This is caused by one or more cylinders not firing correctly.
- Engine Hesitation or Stumbling: During acceleration, the truck may feel like it's jerking, stumbling, or losing power.
- Reduced Fuel Economy: When a cylinder misfires, unburned fuel can be wasted, causing you to visit the gas station more often.
- Trouble Starting: While less common when only one coil fails, multiple bad coils can make the engine difficult to start.
Rule Out Other Issues First
The V8 engines in these trucks can have other problems that cause a misfire. Before you spend money on new coils, be aware of Technical Service Bulletins (TSBs) for issues like collapsed lifters (part of the AFM/DFM system) or chafed wiring harnesses that can produce the exact same symptoms. A professional diagnosis may be needed if a new coil doesn't solve the problem.
Choosing the Right Aftermarket Ignition Coil
When replacing an ignition coil, you have several quality tiers to choose from. For a daily-driven truck, sticking to OEM-equivalent brands is a safe bet for reliability. Performance brands offer higher voltage for modified engines, while value brands provide a budget-friendly option.
Tier 1: OEM & Premium Aftermarket
These brands are known for manufacturing original equipment for GM or for having a reputation for equivalent quality and reliability. They are the recommended choice for most owners who want a fit-and-forget solution.
- Delphi: A major OE supplier for GM. Delphi coils are designed to meet or exceed factory specifications for performance and durability.
- NGK: Known for their spark plugs, NGK also produces high-quality ignition coils that are a trusted alternative to OEM parts.
- Hitachi: Another Japanese manufacturer with a strong reputation for producing reliable electronic components for many automakers.
- Standard Ignition (SMP): A long-standing aftermarket manufacturer that offers parts meeting OE form, fit, and function.
Tier 2: Performance Aftermarket
These brands are for owners looking to get more spark energy for a modified engine or who want a visual upgrade under the hood. They often claim higher voltage output and potential horsepower gains.
- Granatelli: Claims outputs of up to 80,000 volts and horsepower gains of up to 12 HP. They are a premium-priced option for enthusiasts.
- FAST (Fuel Air Spark Technology): Focuses on performance ignition systems and offers coils designed for higher output.
- Mishimoto: While known for cooling products, they offer performance ignition coils designed for durability and increased spark energy.
Tier 3: Standard & Value Aftermarket
These brands offer a cost-effective solution for repairs. They are a viable option, but may not have the same long-term durability or stringent quality control as premium brands.
- DriveWire
- Holstein
- Prenco
- Spectra
- URO Parts
- Walker Products
Pro Tip: The Swap Test
The easiest way to confirm a bad coil is to swap it. If your check engine light gives a code for cylinder 3 (P0303), use a 10mm socket to swap the coil from cylinder 3 with the one from cylinder 1. Clear the codes and drive. If the code changes to P0301, you've confirmed the coil is the problem.
🎬 See this walkthrough for replacing coils on 2014-2019 trucks.Cost of Replacing a Silverado Ignition Coil
The cost can vary significantly based on the brand you choose and whether you do the work yourself. Replacement is a very feasible DIY job for most owners.
| Part / Service | Estimated Cost |
|---|---|
| Single Aftermarket Ignition Coil | $35 - $150 |
| Single OEM (ACDelco) Ignition Coil | $70 - $120 |
| Performance Ignition Coil (Single) | $100 - $200+ |
| Shop Labor (Single Coil) | $50 - $150 |
| DIY Total (Single Premium Coil) | $50 - $90 |
| Shop Total (Single Premium Coil) | $120 - $270 |
Frequently Asked Questions
Do I need to replace all ignition coils at once?
No, you don't have to. You can replace only the failed coil. However, ignition coils are wear items, and they have all been working for the same amount of time. If one has failed, others may not be far behind. Many owners choose to replace them as a full set, along with spark plugs, for peace of mind, especially on a higher-mileage truck.
Should I replace my spark plugs with the ignition coils?
It is highly recommended. You already have the coils off, which gives you direct access to the spark plugs. Worn spark plugs can put extra strain on the ignition coils, potentially causing them to fail prematurely. Replacing them together ensures the entire secondary ignition system is in top shape.
🎬 Watch: How to replace spark plugs on 2019+ Silverados.Is this a difficult job to do myself?
No, this is considered a beginner-level repair. It requires basic hand tools, primarily a 10mm socket and a ratchet. The process involves removing the plastic engine cover, disconnecting the electrical plug, and removing two bolts. The passenger side can be a bit tighter to access.
What are the torque specs for the ignition coil bolts?
The 10mm bolts holding the coil to the valve cover should be tightened to 89 in-lbs (about 10 Nm). It's important not to overtighten them, as you could crack the plastic coil housing or strip the threads in the valve cover.
Is there a recall on ignition coils for my Silverado?
There are no active recalls specifically for ignition coils on the 2015-2024 Silverado 1500. There was a well-known recall for ignition *switches* on older GM vehicles, which is a different part. A recent recall (NHTSA 25V-274) for 2021-2024 6.2L engines concerns internal engine failure and is not related to the ignition system.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12674754 12658222 12699388 12638824
These trucks use a coil-on-plug (COP) system with one coil per cylinder. The coils are typically a square-body design. The mounting bolts require a 10mm socket and should be torqued to 89 in-lbs (10 Nm).
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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.
- Chevrolet Silverado 1500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Silverado's Ignition Coil Failing?
- Key Failure Symptoms:
- Rule Out Other Issues First
- Choosing the Right Aftermarket Ignition Coil
- Tier 1: OEM & Premium Aftermarket
- Tier 2: Performance Aftermarket
- Tier 3: Standard & Value Aftermarket
- Pro Tip: The Swap Test
- Cost of Replacing a Silverado Ignition Coil
- Frequently Asked Questions
- 🎟️ Get 5% Off