Ignition Coil & Spark Plugs for Chevrolet P30 GMC P35 P3500 Van (1998-1999) 7.4L V8

High-Output Ignition Coil & Spark Plugs for 1998-1999 Chevrolet P30, P35

A complete ignition system overhaul kit designed to eliminate misfires and restore maximum voltage delivery to the combustion chamber. This comprehensive package includes eight application-specific ignition coils, spark plug wires, and spark plugs calibrated for the 7.4L V8.

The Stock P-Series Ignition Shortcomings

The factory ignition coils on the heavy-duty 7.4L Vortec V8 are highly susceptible to thermal degradation and voltage leaks as mileage accumulates. Sitting in a cramped forward-control chassis, the P30 and P35 engine bays suffer from severe heat soak. Over time, the constant thermal cycling breaks down the OEM coil's epoxy potting and the internal secondary windings. This thermal degradation leads to micro-cracks in the plastic housing, allowing moisture intrusion and cross-firing. The result is a weak spark, persistent misfires under heavy loads, sluggish throttle response, and a noticeable drop in the 410 lb-ft of torque needed to move these heavy commercial and recreational vehicles.

The Engineering Solution

This replacement ignition kit is engineered to withstand the brutal underhood temperatures of the P-Series chassis. The upgraded ignition coils feature high-grade copper windings and premium dielectric epoxy potting to maximize energy transfer while resisting thermal breakdown. The housing is molded from high-dielectric reinforced polymer to eliminate pinhole leaks and housing cracks. Paired with low-resistance spark plug wires featuring heavy-duty silicone boots, this system ensures a highly focused, maximum-voltage spark reaches the plug electrodes. By delivering a hotter, more consistent spark, the 7.4L L29 engine achieves complete combustion, resulting in smoother idle quality, restored towing power, and lower emissions without the risk of high-load spark blowout.

Technical Specifications

Compatibility

• 1998-1999 Chevrolet P30 7.4L V8
• 1998-1999 GMC P35 7.4L V8
• 1998-1999 GMC P3500 7.4L V8

The Chevrolet Commercial Durability

For heavy-duty fleet trucks and RVs relying on the GM P-Chassis, consistent ignition performance is mandatory. This kit ensures reliable starts, sustained towing capability, and maximum uptime for your 7.4L workhorse.