High Performance Ignition Coil for Chevrolet Colorado (2009-2012) 5.3L

High-Output Ignition Coil Upgrade for 2009-2012 Chevrolet Colorado (LH8/LH9 / GMT355)

Designed specifically for the 5.3L Gen IV V8, this set of 8 UF414 replacement ignition coils upgrades OEM ignition voltage to eliminate misfires under heavy load.

The Stock GMT355 Ignition Weakness

The factory Delphi-style coils equipped on the 5.3L LH8 and LH9 engines are notorious for degrading over time, particularly under continuous thermal cycling inside the tight GMT355 engine bay. As the internal epoxy deteriorates, the stock coils experience dielectric breakdown, leading to parasitic voltage leaks. This mechanically manifests as high-RPM misfires, sluggish throttle response during towing operations, and poor fuel economy. Furthermore, as the internal primary windings succumb to prolonged heat soak, the resulting weak spark fails to fully combust the air-fuel mixture, leaving unburnt fuel and increasing the risk of premature catalytic converter degradation over high mileage periods.

The Engineering Solution

This UF414 ignition coil set addresses these OEM shortcomings through an over-engineered winding design and superior insulation materials. Utilizing advanced copper wire internals and a high-dielectric epoxy housing, these coils generate a significantly hotter, more stable spark compared to factory specifications. This enhanced spark energy ensures complete combustion, even under high cylinder pressures encountered during steep towing gradients. The upgraded silicone boots provide excellent resistance to extreme engine bay temperatures and moisture penetration, effectively eliminating voltage flashover. By maintaining precise spark timing and maximum electrical output, this upgrade restores factory idle smoothness, improves low-end torque delivery, and stabilizes peak horsepower output throughout the entire RPM range.

Technical Specifications

Compatibility

• 2009 Chevrolet Colorado 5.3L V8
• 2010 Chevrolet Colorado 5.3L V8
• 2011 Chevrolet Colorado 5.3L V8
• 2012 Chevrolet Colorado 5.3L V8

The Chevrolet Workhorse Standard

Built to handle rigorous towing cycles and sustained heavy-duty use, these upgraded coils deliver the reliability and consistent ignition performance required to keep your 5.3L Colorado operating at peak efficiency under the most demanding loads.