Ignition Coil & Iridium Spark Plugs & Wire GMC Yukon Yukon XL (2015-2020) 5.3L 6.2L V8

High-Energy Ignition Coil & Iridium Spark Plug Kit for 2015-2020 GMC Yukon

Direct Bolt-On Ignition Upgrade: Replaces degraded factory coils, wires, and spark plugs to restore optimal combustion, eliminate misfires, and stabilize idle across the EcoTec3 powerband.

The Stock Yukon L83 & L86 Ignition Shortcomings

Over time, the factory ignition components on the GMT K2XX chassis are subjected to extreme underhood temperatures. The original coil packs often suffer from internal epoxy degradation and secondary winding failure, leading to weakened spark output. Furthermore, OEM spark plug wires experience insulation breakdown, causing voltage leaks, cross-firing, and increased electrical resistance. Combined with carbon-fouled factory spark plugs, this degradation manifests as rough idling, hesitation under heavy towing loads, engine twitch, and intermittent misfires that trigger Check Engine Light (CEL) and VSC warning codes. This efficiency loss severely handicaps the 5.3L's fuel economy and low-end torque.

The Engineering Solution

This comprehensive ignition overhaul kit is engineered to deliver a 20% increase in spark energy over standard factory coils. The replacement UF742 coils feature high-purity copper internal windings sealed in premium epoxy, generating up to 26,000 volts with a 61:1 turns ratio for a significantly hotter spark. The included 8mm silicone spark plug wires feature high-temperature fiberglass heat shields to prevent thermal breakdown from exhaust manifold heat soak. Additionally, the 41-114 Iridium spark plugs utilize an ultra-fine wire center electrode with an exceptionally high melting point to maximize combustion efficiency. This combination ensures complete cylinder burning, eliminating misfires and restoring the raw towing torque your L83 or L86 engine demands.

Technical Specifications

Compatibility

• 2015-2020 GMC Yukon 5.3L V8
• 2015-2020 GMC Yukon 6.2L V8
• 2015-2020 GMC Yukon XL 5.3L V8
• 2015-2020 GMC Yukon XL 6.2L V8

The GMC Durability Standard

Built for the rigorous demands of towing and hauling, this heavy-duty ignition upgrade ensures your GMT K2XX powertrain maintains relentless reliability and consistent power delivery, regardless of payload or demanding terrain.

Common Questions

Will this ignition kit fit my 2015-2020 GMC Yukon or Yukon XL?
Yes, this direct bolt-on kit fits 2015-2020 GMC Yukon and Yukon XL models equipped with either the 5.3L (L83) or 6.2L (L86) EcoTec3 V8 engine.

What is included in the kit?
The kit includes a complete set of UF742 replacement ignition coils, 41-114 iridium spark plugs, and 748UU 8mm silicone spark plug wires with fiberglass heat shields.

How do these coils compare to the factory ignition coils?
These UF742 coils feature high-purity copper windings sealed in epoxy and a 61:1 turns ratio, generating up to 26,000 volts for a 20% increase in spark energy over standard factory coils.

Does this require any modifications to install?
This is a direct bolt-on upgrade designed to replace your factory coils, spark plugs, and wires on the GMT K2XX chassis without modifications.

Which model years does this kit fit?
This kit is built specifically for the 2015-2020 GMC Yukon and Yukon XL on the GMT K2XX platform.