Ignition Coil + Spark Plugs for GMC Sierra (2017-2018) 6.0L

High-Reliability Ignition Coil and Spark Plug Service Kit for 2017-2018 GMC Sierra (K2XX)

What it Does: The ignition kit refreshes secondary ignition output on the 2017-2018 Sierra to resolve engine misfires, restore lost combustion efficiency, and stabilize idle quality.

The Stock GMC Sierra Secondary Ignition Breakdown

Under heavy load and elevated thermal conditions, factory ignition coils on the L96 6.0L engine suffer from heat-induced micro-cracking in the primary/secondary coil epoxy and dielectric boot breakdown. Simultaneously, factory spark plug ground electrodes erode over extended service intervals, increasing the required firing voltage. This elevated resistance overtaxes worn coils, leading to high-load spark blowout, hesitation during towing, unburned hydrocarbon buildup, and diagnostic trouble codes such as P0300 through P0308.

The Engineering Solution

This service replacement kit restores full spark delivery by pairing eight heavy-duty ignition coils with precision NGK Platinum spark plugs. Designed to meet or exceed UF414 OE specifications, the coils feature high-conductivity copper windings and heat-resistant silicone boots to resist dielectric puncture and heat soak. The matched NGK Platinum plugs maintain stable gap dimensions under severe combustion pressures, promoting uniform flame kernel expansion, crisp throttle response, and consistent ignition saturation through the entire rev band.

What's Included

• 8x Replacement Ignition Coils (Replaces UF414)
• 8x NGK Platinum Spark Plugs

Technical Specifications

Compatibility

• 2017-2018 GMC Sierra 2500 HD 6.0L V8

Frequently Asked Questions & Fitment Warnings

Does this fit the K2XX Sierra?

Yes, this is a direct fit for the 2017-2018 GMC Sierra equipped with the L96 6.0L engine. This kit is not compatible with 5.3L or 6.2L EcoTec3 engines or applications with alternative coil harness connector configurations.

Are spark plug wires included with this ignition package?

Spark plug wires are not included with this kit and must be inspected and reused or replaced separately.

The GMC Heavy-Duty Standard

Engineered for high-demand work trucks, this ignition package provides the dependable spark discharge required to maintain rated payload capacities and steep-grade hauling power without misfires.