Ignition Coil + Iridium Spark Plugs for Chevrolet S-10 (1998-2003) 2.2L

High-Conductivity Ignition Coil and Iridium Spark Plug Kit for 1998-2003 Chevrolet S-10

What it Does: The Ignition Coil and Iridium Spark Plug Kit replaces degraded factory ignition packs and worn plugs on the 1998-2003 Chevrolet S-10 to restore primary spark energy, eliminate misfires, and improve combustion efficiency.

The Stock Chevrolet S-10 Waste-Spark Thermal Breakdown

The factory GMT325 platform relies on a dual-tower waste-spark distributorless ignition system mounted directly adjacent to the cylinder head on the Vortec 2200 (LN2/L43) engine. Continuous thermal cycling breaks down internal copper windings, degrades epoxy insulation, and creates micro-fractures in the housing. Over time, high electrical resistance causes secondary coil output drops, leading to incomplete combustion, rough idle, hesitant throttle tip-in, and spark blowout under load.

The Engineering Solution

Engineered to meet or exceed OEM specifications, these direct-fit ignition coils feature reinforced thermoplastic housings and high-dielectric epoxy potting to eliminate secondary winding arcing and withstand underhood heat soak. Paired with fine-wire iridium spark plugs, this kit provides a consistently focused electrical arc requiring lower initiation voltage. The corrosion-resistant iridium center electrodes prevent premature gap erosion, maintaining a sharp spark boundary across the powerband. Replaces OEM reference 10472401 and cross-references 10457109 and D540.

Technical Specifications

Compatibility

• 1998-2003 Chevrolet S-10 Base 2.2L L4 (Gasoline / Flex-Fuel)
• 1998-2003 Chevrolet S-10 LS 2.2L L4 (Gasoline / Flex-Fuel)
• 1998-2003 Chevrolet S-10 Xtreme 2.2L L4 (Gasoline / Flex-Fuel)

Frequently Asked Questions

Does this fit the GMT325 S-10?
Yes, this is a direct fit for the 1998-2003 Chevrolet S-10 equipped with the Vortec 2200 2.2L engine.

Do these spark plugs require gapping before installation?
The iridium plugs are pre-gapped to factory specifications; avoid using conventional coin-style gap tools to prevent damaging the fine iridium tip.

The Chevrolet Workhorse Standard

Light trucks like the GMT325 depend on consistent spark delivery for towing and daily hauling duties. Restoring stable voltage across all load ranges maintains balanced fuel economy, ensures smooth low-RPM torque delivery, and prevents unburned hydrocarbons from fouling downstream catalytic converters.