Ignition Coil + Spark Plugs for Chevrolet C2500 C3500 K2500 K3500 (1996-2000) 5.0L 5.7L 7.4L

Direct-Replacement Ignition Coil and Spark Plug Kit for 1996-2000 Chevrolet C/K Trucks (GMT400)

What it Does: The ignition coil and spark plug kit replaces degraded secondary ignition components on 1996-2000 Chevrolet C/K Trucks to eliminate misfires under heavy load, restore combustion efficiency, and stabilize idle quality.

The Stock Chevrolet C/K Trucks Dielectric Breakdown

The factory secondary ignition system on GMT400 platform trucks equipped with L30, L31, and L29 Vortec V8 engines relies on a single coil driving a distributor. Decades of engine-bay thermal cycling cause the factory coil's internal epoxy potting to crack and its winding insulation to deteriorate. This results in severe high-voltage arcing to ground under towing loads. Simultaneously, standard copper spark plugs experience electrode erosion and gap widening over time. This increased gap forces the compromised coil to operate past its saturation limits, triggering secondary ignition breakdown, hesitation, and P0300 multi-cylinder misfire codes.

The Engineering Solution

This ignition service kit eliminates secondary breakdown by restoring proper voltage transfer across the combustion cycle. The replacement coil utilizes premium magnetic steel laminations and heat-resistant epoxy insulation to resist thermal degradation and internal shorting, ensuring reliable spark energy delivery. Matched with eight precision spark plugs featuring high-dielectric ceramic insulators and erosion-resistant electrode cores, this kit maintains optimal flame front initiation. Designed as a direct mechanical replacement for OEM part 10489421 and D577, the coil fits existing factory brackets and connects directly to the OEM harness connector without splicing.

Technical Specifications

Compatibility

• 1997-1998 Chevrolet C2500 5.0L
• 1997-2000 Chevrolet C2500 5.7L, 7.4L
• 1996-2000 Chevrolet C3500 5.7L, 7.4L
• 1996-2000 Chevrolet K2500 5.7L, 7.4L
• 1996-2000 Chevrolet K3500 5.7L, 7.4L

Frequently Asked Questions

Does this fit the GMT400 C/K Trucks?
Yes, this is a direct fit for the 1996-2000 Chevrolet C/K Trucks equipped with the L30, L31, or L29 engine.

Should spark plug gaps be verified before installation?
Yes, always verify electrode gap against the factory under-hood emissions label or service manual specs prior to threading them into the cylinder head.

The Chevrolet Heavy-Duty Caliber

Engineered to handle the high heat and sustained load demands of heavy payload and commercial towing, this ignition package restores dependable spark generation across all eight cylinders for reliable truck operation.