Ignition Coil + Spark Plugs for Chevrolet Tahoe (1996-2000) 5.7L

OEM-Grade Ignition Coil and Spark Plug Kit for 1996-2000 Chevrolet Tahoe (GMT400)

What it Does: The Ignition Coil and Spark Plug Kit restores primary and secondary ignition performance on the 1996-2000 Chevrolet Tahoe to eliminate misfires, stabilize idle, and maximize combustion efficiency under load.

The Stock Chevrolet Tahoe Ignition Breakdown

Factory ignition coils on the GMT400 platform endure persistent heat soak due to close proximity to the exhaust manifolds on the L31 Vortec 5700 V8. Over extended heat cycles, the stock epoxy potting degrades, causing internal winding breakdown, arc-through, and intermittent high-load misfires (DTC P0300). Simultaneously, extended service intervals erode factory plug electrodes, widening the spark gap beyond factory tolerance and overtaxing the coil's secondary reserve voltage.

The Engineering Solution

This direct replacement service kit includes a heavy-duty single ignition coil and eight pre-gapped, thermally matched spark plugs. The coil features premium magnetic laminations and temperature-resistant potting compound to resist dielectric punch-through under high thermal stress. Paired with corrosion-resistant spark plugs designed for optimal heat dissipation and flame-kernel propagation, this kit directly supersedes OEM part numbers 10489421 and D577 to deliver dependable start-up and consistent spark energy across all eight combustion chambers.

Technical Specifications

Compatibility

• 1996-1999 Chevrolet Tahoe 5.7L V8
• 2000 Chevrolet Tahoe 5.7L V8 (Tahoe Classic / GMT400 platform only)

Frequently Asked Questions

Does this fit the GMT400 Tahoe?

Yes, this is a direct fit for the 1996-2000 Chevrolet Tahoe equipped with the L31 5.7L Vortec engine.

Should I check the spark plug gaps before torquing?

Yes, always verify the plug gaps against factory specifications (nominal 0.060 inch) prior to threading into the iron cylinder heads.

The Chevrolet Tahoe Heavy-Duty Standard

When pulling heavy trailers or navigating steep grades, reliable secondary ignition voltage is critical to avoid fuel wash and high-load detonation in your small-block V8.