Ignition Coil and Iridium Spark Plugs for Chevrolet Colorado (2017-2021) 3.6L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2017-2021 Chevrolet Colorado

What it Does: Replaces worn factory secondary ignition components to eliminate engine misfires, stabilize idle quality, and restore peak combustion efficiency across all six cylinders.

The Stock Colorado Ignition Degradation

Under continuous thermal cycling and high-duty engine operation, the factory coil-on-plug units on the 3.6L direct-injected platform suffer from dielectric breakdown and micro-cracking within the internal epoxy potting. This thermal fatigue, combined with natural electrode erosion on aging spark plugs, increases resistance across the secondary ignition circuit. The result is weakened spark output, hesitation under load, erratic idle speed, and diagnostic trouble codes such as P0300 through P0306.

The Engineering Solution

This comprehensive service kit includes six reinforced coil-on-plug assemblies engineered with high-conductivity copper primary and secondary windings, heavy-duty thermoplastic housings, and OEM-spec direct-fit blade terminals. Paired with six fine-wire iridium spark plugs engineered for superior thermal resistance and gap stability, this package provides consistent spark energy, robust flame kernel propagation, and dependable high-load combustion efficiency.

Technical Specifications

Compatibility

• 2017 Chevrolet Colorado 3.6L V6 (LT, WT, Z71, ZR2)
• 2018 Chevrolet Colorado 3.6L V6 (LT, WT, Z71, ZR2)
• 2019 Chevrolet Colorado 3.6L V6 (LT, WT, Z71, ZR2)
• 2020 Chevrolet Colorado 3.6L V6 (LT, WT, Z71, ZR2)
• 2021 Chevrolet Colorado 3.6L V6 (LT, WT, Z71, ZR2)

The Chevrolet Colorado Durability Standard

Designed to withstand the harsh thermal and vibrational demands of heavy payload hauling and sustained towing, this ignition kit maintains consistent spark delivery under peak cylinder pressures without spark blowout or thermal degradation.