Ignition Coil & Spark Plug for Chevy Suburban 1500 2500 Tahoe (2007-2014) V8 (Round Style)

High-Output Ignition Coil & Spark Plug Set for 2007-2014 Chevrolet Suburban, Tahoe

What it Does: Replaces aging factory coils, plugs, and wires to restore combustion efficiency, correct misfires.

The Stock GM V8 Ignition Weakness

Over time, the factory Delphi or Melco ignition coils on GM Gen IV V8 engines degrade significantly due to extreme engine bay heat cycling and continuous high-voltage discharge. The primary epoxy insulation inside the coil housing micro-cracks, leading to voltage leaks to the engine block, weak spark delivery, and inevitable P0300-series misfire codes. Furthermore, standard OEM spark plug wires experience increased internal resistance as the carbon core breaks down, causing delayed spark timing, rough idling, poor fuel economy, and diminished towing performance.

The Engineering Solution

This direct-replacement ignition package upgrades the factory system with high-energy round-style D514A/UF414 coils, matched spark plugs, and low-resistance 748UU 8mm wires. Engineered with an upgraded internal copper winding and a 61:1 turns ratio, these coils deliver up to 32,000 peak volts. The external housing is sealed with high-dielectric epoxy to combat heat soak and prevent the thermal breakdown typical in tight truck engine bays. Paired with high-conductivity spark plug wires, this kit ensures a complete fuel burn, eliminating hesitation under load and stabilizing idle quality. Note: This kit specifically replaces the round-body D514A/UF414 coil, not the square-body D510C/UF413 design.

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 vehicles equipped with ROUND coils (UF414 / D514A), not suitable for square coils (UF413 / D510C).

The Chevrolet Heavy-Duty Caliber

Whether hauling a heavy payload, towing a trailer, or managing daily driving duties, ensuring a highly reliable spark is critical to your GM truck's longevity and performance. This upgraded ignition suite ensures maximum towing torque and consistent power delivery without CEL interruptions.

Common Questions

Will this fit my 2012 Tahoe 5.3?

Yes. It fits 2007-2014 Tahoe and Suburban with round-style coils.

How do I know if I have round or square coils?

Look at the coil body. Round coils (UF414/D514A) have a round body. Square UF413 coils are a different part.

What's in the set?

Eight round coils, spark plugs and 8mm plug wires (748UU), enough for the whole V8.

Will it fix my misfire?

If a worn coil, plug or wire is causing the P0300-series misfire, replacing all three restores a clean spark on every cylinder.