Ignition Coil & Iridium Spark Plugs & Wire for Hummer H2 (2003-2007) 6.0L

Direct-Fit High-Output Ignition Service Kit for 2003-2007 Hummer H2

What it Does: Replaces degraded factory round coils, resistance-fatigued plug leads, and worn plugs to restore spark energy and combustion stability across the Vortec 6.0L V8.

The Stock H2 Secondary Ignition Breakdown

Under sustained load and high engine bay thermal stress typical of the heavy GMT820 platform, OEM ignition coils suffer internal dielectric insulation breakdown. Concurrently, factory carbon-core plug wires endure thermal fatigue from nearby exhaust manifolds, leading to elevated conductor resistance, boot carbon tracking, and spark scatter. When paired with high-mileage electrode erosion on stock plugs, coil dwell saturation degrades, triggering rough idle harmonics, power loss on steep climbs, and P0300 random misfire trouble codes.

The Engineering Solution

This complete ignition kit utilizes high-output round D585/UF262 coil architectures encapsulated in high-grade dielectric epoxy potting to resist thermal cycling and eliminate secondary winding breakdown. Low-resistance 8mm silicone-jacketed plug wires feature stranded copper cores and stainless-steel terminal heat shields to repel radiant manifold heat. Combined with laser-welded fine-wire iridium spark plugs, this package lowers required discharge voltage, sharpens flame kernel development, and guarantees reliable cylinder combustion under heavy towing loads.

Technical Specifications

Compatibility

• 2003-2007 Hummer H2: Base, Adventure, and Luxury trims equipped with the 6.0L Vortec V8 (Round UF262/D585 coil body only; not compatible with square UF271 coils)
• OE Coil Interchange: UF262, D585, C1251, 10457730, 12563293, 12573190, 8104577300, 8125731900, GN10119, 5C1082, E254, E254P, 52-1647, IC413, 6737101, 19005218
• Wire Interchange: 12192195, 9748GG, 748GG, 748UU, 12622553, 88862397, 12656210, XS10388, 12192192, 7873
• Plug Interchange: 19299585, 41-962

The Hummer Heavy-Duty Caliber

Engineered specifically to withstand high-duty cycles, extreme underhood thermal saturation, and continuous low-speed crawling, this ignition kit provides the durable combustion reliability required for heavy vehicle recovery, steep ascents, and maximum towing performance.