Ignition Coil & Iridium Spark Plugs & Wire Chevrolet Silverado 1500 Legacy (2014-2020) 5.3L 6.2L V8

High-Output Ignition Coil & Iridium Spark Plug Kit for 2014-2020 Chevrolet Silverado

Resolves ignition system failures by delivering a 20-percent increase in spark energy over factory components, ensuring complete combustion for the EcoTec3 V8.

The Stock Silverado Ignition Weakness

The GM EcoTec3 5.3L and 6.2L V8 engines are highly susceptible to under-hood heat soak, which progressively degrades the factory ignition coils and spark plug wires. Over extended mileage cycles, the thermal cycling breaks down the OEM coil's internal epoxy potting and compromises the secondary windings. This degradation manifests as internal voltage leakage, increased secondary electrical resistance, and a weak spark kernel. For the driver, this directly translates to cylinder misfires (often triggering P0300-series diagnostic trouble codes), rough idling, delayed throttle response, and a noticeable drop in overall fuel efficiency. Standard factory wires further exacerbate this issue as their insulation hardens and cracks, causing parasitic voltage loss and increased electromagnetic interference.

The Engineering Solution

This comprehensive ignition overhaul addresses these specific failure points through enhanced material selection and electrical design. The upgraded UF742 coils utilize pure copper primary and secondary windings encased in a high-dielectric epoxy, achieving a 61:1 turns ratio that safely outputs up to 26,000 volts—a 20-percent energy increase over stock components. High-temperature resistant silicone boots and high-density sleeves prevent voltage flashover. To harness this increased voltage, the kit includes 41-114 Iridium spark plugs. The ultra-fine iridium center electrode provides an extremely high melting point, yielding a concentrated, stable spark kernel for maximum combustion efficiency. Finally, the included 8mm spark plug wires feature robust heat shields and a high-suppression core to deliver peak voltage to the plug while eliminating RFI/EMI electronic interference, effectively restoring factory drivability and peak engine efficiency.

Technical Specifications

Compatibility

• 2014-2020 Chevrolet Silverado 1500 5.3L V8
• 2014-2020 Chevrolet Silverado 1500 6.2L V8
• 2019 Chevrolet Silverado 1500 LD (Legacy) 5.3L V8

The Chevrolet Heavy-Duty Standard

Engineered to handle harsh thermal environments and high engine loads, this complete ignition package restores the heavy-duty reliability required for hauling and towing while optimizing the V8 power delivery of your Silverado.