Yunnergo Ignition Coil and Spark Plug Wire Kit for GM V8 — 8-Pack Square Coils with Iridium Plugs and Wires

Yunnergo's 8-pack square ignition coils with matching iridium spark plug wires and plugs replace worn ignition components for many GM V8 trucks, restoring consistent spark and dependable starting. Whether you're maintaining a daily driver or prepping a work truck, this complete ignition coil and spark plug wire kit supplies the parts most often replaced together to address misfires, rough idle, or hard starts on older GM V8 engines. The set includes eight square-type ignition coils, eight high-quality spark plug wires, and eight iridium spark plugs—packaged to match factory locations for a straightforward swap.

Which vehicles and engines will these parts fit?

This kit covers a broad range of General Motors trucks and SUVs with 4.3L V6 and 4.8L–8.1L V8 engines across model years primarily from late 1990s through 2009. Check the fitment list against your VIN and engine size before ordering to confirm compatibility.

• Common fits: Chevrolet Tahoe, Silverado 1500/2500/3500, Suburban, Avalanche, Express, SSR, Sierra, Silverado HD, and GMC Denali/Yukon variants.
• Engine coverage: 4.3L V6 and V8 options including 4.8L, 5.3L, 6.0L, 6.2L, 8.1L across specified years.
• Cross-references: replaces OE numbers like D581, UF271 and various GM ignition and wire part numbers listed on the product page.

How do these ignition coils and wires improve vehicle operation?

Replacing fatigued coils and worn wires can re-establish a strong, consistent spark to each cylinder, which helps engines run more smoothly and start reliably. The included iridium plugs provide a precise electrode for stable combustion while the square coil design delivers sufficient voltage under typical driving conditions.

• Restores spark consistency across all eight cylinders for fewer misfires.
• Iridium plugs offer long service life and stable firing characteristics.
• Matched coil-and-wire set reduces installation guesswork and mismatch issues.

What’s included and what should I prepare for installation?

The kit arrives with every ignition component needed for a full eight-cylinder replacement—coils, plug wires, and iridium plugs—so you won't need to source individual parts. Basic hand tools, dielectric grease, and a torque wrench are useful; follow manufacturer torque specs when tightening spark plugs and coil fasteners.

• Packing list: 8 square ignition coils, 8 spark plug wires, 8 iridium spark plugs.
• Tools recommended: ratchet, spark plug socket, torque wrench, dielectric grease, anti-seize if desired.
• Installation tip: replace one coil/wire at a time to preserve cylinder firing order and avoid cross-connection.

Are these parts direct replacements for original equipment?

Yes—the coils and wires are designed to match OEM fit and electrical characteristics for the listed applications. They use cross-reference numbers tied to common GM part numbers, making them suitable alternates for routine maintenance or repair.

• Form-and-fit engineered to align with factory mounting and electrical connectors.
• Cross-referenced to OEM numbers such as 12556893, 12570553 and common wire part codes.
• Sold as a full eight-cylinder kit to ensure consistent component age and performance.

Who is this for? This Yunnergo eight-piece ignition package is aimed at owners and technicians working on late-1990s through 2009 GM trucks and SUVs with 4.3L–8.1L engines who want a coordinated, all-in-one replacement to address ignition-related drivability issues. It's a good choice for DIY mechanics doing scheduled maintenance, fleet service shops standardizing repairs, or anyone restoring reliable starting and smooth idle without hunting down individual components.

FAQ

Q: Will this kit fit my Silverado 1500 5.3L V8?

A: Yes, this Yunnergo 8-piece kit is compatible with many Silverado 1500 models with the 5.3L V8—verify year range listed on the product to confirm fit.

Q: Does the package include spark plugs and wires?

A: Yes. The kit contains 8 square ignition coils, 8 spark plug wires, and 8 iridium spark plugs for a full eight-cylinder replacement.