Ignition Coil + Spark Plugs for Chevrolet Express (2017-2020) 6.0L
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Direct-Replacement Ignition Coil and Spark Plug Kit for 2017-2020 Chevrolet Express (GMT610)
What it Does: The Ignition Coil + Spark Plugs Kit replaces worn primary ignition components on the 2017-2020 Express to restore combustion stability, eliminate cylinder misfires, and maintain consistent ignition timing under load.
The Stock Chevrolet Express Ignition Breakdown
Under heavy commercial duty cycles, the factory ignition components on the GMT610 platform face prolonged thermal saturation within the cramped doghouse engine bay. The original UF413 and 12611424 round-style coils suffer internal epoxy breakdown and primary winding degradation from extreme underhood heat soak. Simultaneously, factory spark plugs suffer center electrode erosion and enlarged gaps past 0.040 inches, drastically elevating secondary breakdown voltage requirements. This voltage stress induces high-rpm spark blowout, intermittent hesitation under heavy payload or towing loads, unburnt hydrocarbon build-up, and recurring P0300 to P0308 diagnostic trouble codes.
The Engineering Solution
This service kit resolves secondary ignition collapse by matching 8 high-dielectric replacement coil packs with 8 wear-resistant NGK Platinum spark plugs. Built to direct-fit D510C specifications, each coil utilizes high-temperature epoxy potting and heavy-gauge copper windings to resist insulation breakdown and maintain primary circuit saturation. Paired with NGK's fine-wire platinum center electrodes, the system lowers required firing voltages, suppresses quench effects, and maintains stable flame-front propagation across the full operating range of the L96 Vortec engine.
What's Included
- 8 Energy Ignition Coils
- 8 NGK Platinum Spark Plugs
Technical Specifications
| Fitment | 2017-2020 Chevrolet Express |
|---|---|
| Engine / Chassis | 6.0L Vortec L96 (Gen IV LS) / GMT610 |
| Stock Output | 341 hp / 373 lb-ft |
| Replaces OEM Part # | UF413, 3186, 178-8411, GN10165, IC533, 8265, 82653, 48713, U5132, C-721, D510C, 12570616, 12611424, D513A, 140043, 140043-8, 140043K, 140043K-8, 2IC422, 50227, 36-1192, 5115, 2505-311071, E893, C1351, C1511, C1511-8, 2-50069, C1511DLGKIT, 8125706160, 8126114240, 5C1154, 5C1554, IC533SB, UF413T, 673-7002, 52-1712, 52-1819, C1511SPEC, 2-50227, EBC1789, 26A1042, 098622A210, IGC0150, GM1316053, SKIC048, CUF413, C1511VC, 920-1061, 2IGC0303 |
Compatibility
- 2017-2018 Chevrolet Express 2500 6.0L
- 2017-2020 Chevrolet Express 3500 6.0L
- 2017 Chevrolet Express 4500 6.0L
Frequently Asked Questions & Fitment Warnings
Does this fit the GMT610 Express?
Yes, this is a direct fit for the 2017-2020 Chevrolet Express equipped with the 6.0L L96 engine; confirm your existing setup uses the round coil body matching UF413 / D510C before ordering, as it does not fit other displacements or square coil configurations.
Are spark plug wires included with this service kit?
Spark plug wires are not included; this kit contains only the 8 replacement ignition coils and 8 NGK platinum plugs.
The Chevrolet Commercial Standard
When operating a dedicated commercial fleet or heavy towing vehicle, secondary ignition integrity is essential. Restoring stable spark delivery eliminates unburnt fuel washdown, maintains maximum GCWR pulling capability, and secures steady torque output across long-haul duty cycles.
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