Ignition Coil & Spark Plug for GMC Sierra 1500 2500 HD 3500 HD (2007-2016) V8 (Round Style)

High-Output Ignition Coil & Spark Plug Kit for 2007-2016 GMC Sierra V8

Directly replaces degraded OEM round-style ignition coils, wires, and spark plugs to restore maximum voltage output, resolving misfires and hesitation under heavy load.

The Stock Sierra Ignition Weakness

The factory OEM coils on GM's Gen IV Vortec V8 engines frequently suffer from thermal degradation and epoxy housing fractures. Repeated extreme heat cycling in the engine bay causes the internal potting to crack, leading to increased primary resistance and weak spark blow-out when the engine is subjected to heavy towing or payload demands. Over time, the factory spark plug wire insulation also breaks down, causing parasitic voltage leaks to the engine block and triggering persistent P0300-series misfire diagnostic trouble codes.

The Engineering Solution

This comprehensive ignition kit utilizes upgraded D514A/UF414 round-body coil packs engineered with an advanced thermal epoxy construction to resist heat soak and vibration. Operating with a 61:1 turns ratio and a peak maximum voltage of 32,000V, these units deliver 20% more spark energy than the standard OEM components. High-conductivity durable copper internal wire winding ensures minimal voltage drop, while the housings offer superior dielectric strength. The included 748UU silicone-jacketed spark plug wires prevent arcing, and paired with the 41962 spark plugs, the system is designed to ensure a complete burn for restored throttle response and fuel efficiency. Note: This kit is strictly for applications equipped with factory round coils and will not fit models utilizing the square body UF413/D510C.

Technical Specifications

Compatibility

• 2007-2013 GMC Sierra 1500 (4.8L, 5.3L, 6.0L, 6.2L Gen IV Vortec V8 with Round Coils)
• 2007-2016 GMC Sierra 2500 HD (6.0L Gen IV Vortec V8 with Round Coils)
• 2007-2016 GMC Sierra 3500 HD (6.0L Gen IV Vortec V8 with Round Coils)

The GMC Heavy-Duty Standard

When it comes to hauling heavy payloads or trailering over steep grades, consistent spark delivery is critical to maintaining power and preventing detonation. Upgrading your Sierra's ignition system ensures rock-solid dependability and maximum torque output when you need it most.

Common Questions

Will this ignition kit fit my 2007-2016 GMC Sierra V8?
This kit fits 2007-2013 GMC Sierra 1500 (4.8L, 5.3L, 6.0L, 6.2L) and 2007-2016 GMC Sierra 2500 HD and 3500 HD (6.0L) equipped with Gen IV Vortec V8 engines and factory round-body ignition coils (UF414 / D514A / 12573190).

What is included in the package?
The kit includes a complete V8 set of upgraded UF414 / D514A round-style ignition coils, 748UU silicone-jacketed spark plug wires, and matching 41962 spark plugs.

Does this fit trucks with square-body ignition coils?
This kit is built specifically for Gen IV Vortec V8 engines equipped with factory round-style coils (UF414 / D514A). Trucks factory-equipped with square-body coils require UF413 / D510C components instead.

How do these coils compare to the factory OEM units?
Each coil features a 61:1 turns ratio, high-conductivity copper internal windings, and advanced thermal epoxy construction, delivering up to 32,000V peak output and 20% more spark energy than standard OEM coils.

Does installation require any wiring modifications?
Installation is a direct plug-and-play replacement for factory part numbers UF414, D514A, and 12573190 using the stock brackets and harness connectors.