Ignition Coil & Spark Plug for Chevy Avalanche 1500 (2007-2012) V8 (Round Style)

High-Energy Round Style Ignition Coils & Spark Plugs for 2007-2012 Chevrolet Avalanche

Directly replaces deteriorating OEM ignition components to restore proper spark delivery and eliminate misfires across the rev range.

The Stock Avalanche Ignition Weakness

The factory ignition coils on the GMT900 chassis, specifically the Gen IV Vortec V8s, are notorious for internal epoxy degradation due to prolonged heat soak from the engine block. Over time, the thermal cycling breaks down the primary coil resistance, leading to weak spark output, rough idling, hesitation under load, and eventual P0300-series misfire codes. Furthermore, aging OEM spark plug wires often experience dielectric breakdown, causing voltage leaks that compromise combustion efficiency, reduce fuel economy, and severely limit the truck's towing capability.

The Engineering Solution

This complete ignition overhaul kit replaces the restrictive and failure-prone OEM setup with high-performance round-style coils designed to output 32,000 maximum voltage—a 20% increase in spark energy over stock. Constructed with a highly durable internal epoxy resin and heavy-duty copper wire windings, these coils maintain a stable 0.660-ohm primary and 6.1K-ohm secondary resistance even under extreme thermal stress. The kit includes matched spark plugs and 748UU silicone-jacketed wires to ensure zero voltage leakage and maximum dielectric strength. This direct plug-and-play solution guarantees a stronger, more consistent spark, optimizing fuel burn and restoring the heavy-duty reliability required for hauling and daily driving.

Technical Specifications

Compatibility

• Cadillac Escalade
• Chevrolet Avalanche
• Chevrolet Silverado
• Chevrolet Suburban
• Chevrolet Express
• Chevrolet Tahoe
• Chevrolet Trailblazer
• GMC Savana
• GMC Yukon
• Hummer H3
• Note: Only applicable to round coils (UF414/D514A). Not suitable for square body coils (UF413/D510C). Please verify original style before installation.

The Chevrolet Durability Standard

Built to handle the demanding workloads of the GMT900 platform, this high-energy ignition setup ensures your Avalanche maintains consistent power delivery, whether you're towing heavy payloads or navigating off-road terrain.