High Performance Ignition Coil for GMC Canyon (2009-2012) 5.3L

High-Output UF414 Ignition Coils for 2009-2012 GMC Canyon (LH8/LH9 / GMT355)

What it Does: This complete set of eight high-performance UF414 ignition coils replaces degrading factory units to restore spark intensity, eliminate high-RPM misfires, and improve throttle response on 5.3L V8 GMT355 trucks.

The Stock Canyon Ignition Weakness

OEM factory ignition coils on the 5.3L Gen IV LS engines are notorious for age-related thermal degradation. Constant exposure to the extreme heat cycles generated by the compact GMT355 engine bay causes the internal dielectric epoxy to break down over time. This leads to micro-cracking in the external housing and primary winding failure. As a result, the spark voltage drops significantly, leading to intermittent misfires under heavy load, sluggish low-end torque, and reduced fuel efficiency. The factory coil packs simply cannot sustain peak voltage output when pushed during towing, off-roading, or extended operation.

The Engineering Solution

This UF414 replacement upgrade pack engineers out the factory flaws by utilizing heavy-duty primary and secondary copper wire windings that strictly exceed OEM specifications. By increasing the winding density and utilizing high-grade insulating epoxy, these coils deliver superior thermal dissipation and prevent internal voltage leaks. The reinforced housing materials are highly resistant to heat soak and engine bay vibrations. This results in a much hotter, more consistent spark across the entire RPM range. The enhanced spark duration allows for a more complete combustion cycle, translating to smoother idling, sharper throttle response, and the capability to support increased loads without spark blowout. Installation is a direct plug-and-play process utilizing the factory wiring harness.

Technical Specifications

Compatibility

• 2009 GMC Canyon 5.3L V8
• 2010 GMC Canyon 5.3L V8
• 2011 GMC Canyon 5.3L V8
• 2012 GMC Canyon 5.3L V8

The GMC Durability Standard

For trucks built to haul and work, maintaining reliable ignition under heavy load is non-negotiable. These upgraded coils ensure your Canyon delivers consistent towing capability and unwavering off-road reliability without the risk of mid-trip misfires.