Ignition Coil & Spark Plug for Chevy Silverado 1500 2500 HD (2007-2016) V8 (Round Style)

High-Output Ignition Coil & Spark Plug Kit for 2007-2016 Chevrolet Silverado

Replaces failing OEM ignition coils and worn spark plugs to eliminate misfires, restore consistent spark delivery, and provide 20% greater discharge energy for optimal combustion.

The Stock Silverado Ignition System Weakness

Factory GM Gen IV V8 ignition coils and older plug wires are notoriously susceptible to thermal breakdown and internal resistance spikes over high-mileage cycles. The constant heat cycling generated by the cast iron or aluminum engine blocks degrades the internal epoxy potting of the OEM coils. This degradation causes microscopic cracking, which leads to voltage leakage, high-rpm misfires, rough idling, and poor fuel efficiency. Furthermore, standard carbon-core wires degrade from ambient underhood temperatures, increasing resistance and weakening the spark before it reaches the combustion chamber.

The Engineering Solution

This direct-fit replacement package overhauls the ignition circuit using upgraded round-style D514A/UF414 coil packs, 748UU spark plug wires, and 41962 spark plugs. The redesigned coils utilize high-grade internal copper windings and advanced epoxy resin construction to withstand extreme thermal loads without cracking. These units are engineered to produce a maximum voltage output of 32,000V—a 20% increase in discharge energy compared to standard OEM units. The higher 61:1 turns ratio ensures a robust, consistent spark arc across the plug gap, reducing the risk of blowout under heavy load or towing conditions. This translates to smoother acceleration and stabilized idle characteristics.

Technical Specifications

Compatibility

• Cadillac Escalade
• Chevrolet Avalanche
• Chevrolet Silverado 1500 & 2500 HD
• Chevrolet Suburban
• Chevrolet Express
• Chevrolet Tahoe
• Chevrolet Trailblazer
• GMC Savana
• GMC Yukon
• Hummer H3
• Note: Only fits models equipped with Round Style Coils (D514A / UF414). Does NOT fit Square Style Coils (D510C / UF413). Verify factory coils before installation.

The Chevrolet Workhorse Standard

Whether hauling heavy payloads or towing trailers, maintaining optimal ignition health ensures your Silverado's V8 delivers the uncompromised torque, fuel efficiency, and heavy-duty reliability required for demanding utility applications.