Ignition Coil and Iridium Spark Plugs for Chevrolet Colorado (2015-2021) 2.5L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2015-2021 Chevrolet Colorado

What it Does: Restores factory secondary ignition performance and eliminates misfires by replacing degraded coil-on-plug packs and worn spark plugs with high-dielectric copper coils and pre-gapped iridium plugs.

The Stock Colorado Ignition Degradation

Over thousands of thermal cycles, the factory ignition coils on the 2.5L LCV engine suffer internal insulation breakdown and micro-cracking in the epoxy casing. This thermal stress causes secondary winding resistance drift, resulting in voltage leakage, rough idle, hesitation under load, and intermittent P0300-P0304 misfire diagnostic trouble codes. Concurrently, factory plugs suffer electrode erosion, widening the spark gap and overworking the coils.

The Engineering Solution

This comprehensive kit provides four coil packs wound with high-conductivity oxygen-free copper and insulated with high-grade epoxy resin to prevent dielectric puncture under high-temperature cylinder-head conditions. Paired with four fine-wire iridium spark plugs, this setup ensures lower required firing voltage, precise flame kernel formation, and stable combustion across the entire RPM band. The direct-fit blade connectors and boots resist ozone and thermal cracking, restoring immediate throttle response and efficient fuel burn.

Technical Specifications

Compatibility

• 2015 Chevrolet Colorado 2.5L L4 Base, WT, LT
• 2016 Chevrolet Colorado 2.5L L4 Base, WT, LT
• 2017 Chevrolet Colorado 2.5L L4 Base, WT, LT
• 2018 Chevrolet Colorado 2.5L L4 Base, WT, LT
• 2019 Chevrolet Colorado 2.5L L4 Base, WT, LT
• 2020 Chevrolet Colorado 2.5L L4 Base, WT, LT
• 2021 Chevrolet Colorado 2.5L L4 WT, LT

The Chevrolet Durability Standard

Engineered to handle the continuous duty cycles and thermal loads required of a working mid-size pickup, this ignition system ensures consistent combustion stability under payload and towing conditions without premature spark degradation.