High Performance Ignition Coil for GMC Sierra 1500 2500 HD 3500 HD (2007-2019) 4.8L 5.3L 6.0L 6.2L

High-Output UF414 Ignition Coils for 2007-2019 GMC Sierra (Gen IV / GMT900)

This complete set of eight upgraded ignition coils replaces degrading factory units to restore secondary voltage output, resolving misfires and stabilizing idle across GM V8 engines.

The Stock Sierra Ignition Weakness

The OEM GM ignition coils found on high-mileage GMT900 and early K2XX trucks suffer from progressive thermal degradation and epoxy casing fatigue over time. Mounted directly to the valve covers, these coils endure extreme under-hood temperatures and continuous heat cycling. This thermal stress breaks down the internal primary and secondary windings, leading to increased electrical resistance. As resistance climbs, the spark energy weakens, causing high-RPM spark blowout, rough idling, hesitation under heavy towing loads, and intermittent P0300-series misfire trouble codes. The factory units also struggle to maintain optimal dwell times as they age, significantly reducing combustion efficiency and power delivery in the 4.8L, 5.3L, 6.0L, and 6.2L V8 powerplants.

The Engineering Solution

These UF414-specification high-performance ignition coils are engineered to exceed factory output parameters and withstand extreme operating environments. The internal copper wire windings are upgraded with a thicker gauge and optimized turn ratio, significantly increasing the secondary voltage output over the OEM units. This ensures a hotter, more consistent spark across the plug gap, optimizing fuel burn and eliminating hesitation under high-load conditions like towing or steep inclines. The external housings are constructed from a high-dielectric epoxy and thermal-resistant polymer blend, effectively shielding the internal components from heat soak and preventing the microscopic casing cracks common with original coils. Additionally, corrosion-resistant stainless steel spring contacts guarantee zero-loss energy transfer to the spark plugs, instantly restoring throttle response and stabilizing the engine's powerband.

Technical Specifications

Compatibility

• 2007-2019 GMC Sierra 1500 (4.8L V8, 5.3L V8, 6.0L V8, 6.2L V8)
• 2007-2019 GMC Sierra 2500 HD (6.0L V8)
• 2007-2019 GMC Sierra 3500 HD (6.0L V8)

The GMC Heavy-Duty Caliber

Built to support the rigorous demands of hauling and towing, these upgraded ignition coils ensure your Sierra's V8 maintains relentless reliability and torque delivery, eliminating downtime when you need your truck most.