{"product_id":"ignition-coil-spark-plugs-for-chevrolet-express-1996-2007-4-3l-5-0l-5-7l-7-4l","title":"Ignition Coil + Spark Plugs for Chevrolet Express (1996-2007) 4.3L 5.0L 5.7L 7.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Ignition Coil \u0026amp; Spark Plug Tune-Up Kit for 1996-2007 Chevrolet Express (GMT600 \/ GMT610)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-replacement ignition coil and spark plug kit restores secondary voltage output and ensures crisp combustion across the cylinder bank to eliminate load-induced misfires on the 1996-2007 Chevrolet Express.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Express Thermal Breakdown\u003c\/h3\u003e\n\u003cp\u003eDue to the enclosed doghouse engine bay architecture of the \u003cstrong\u003eGMT600\u003c\/strong\u003e and \u003cstrong\u003eGMT610\u003c\/strong\u003e chassis, engine compartment heat soak is extreme. The OEM distributor-driven ignition coil degrades as continuous heat cycles weaken internal potting resin, producing micro-fractures in the primary and secondary winding insulation. This breakdown leads to high internal resistance, voltage leakage, carbon tracking, and intermittent cylinder misfires (DTC P0300) under heavy hauling conditions. Worn, degraded factory spark plugs widen their electrode gap under erosion, placing excessive inductive stress on the failing coil.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement ignition assembly is engineered to withstand extreme under-hood operating temperatures. The ignition coil features high-grade electrolytic copper windings insulated with premium-grade dielectric epoxy potting to resist thermal degradation and internal short circuits. Matched with cold-rolled, high-durability spark plugs designed to prevent pre-ignition and quench flame blowout, this kit delivers consistent peak kilovolt (kV) arc potential to the distributor, restoring factory fuel atomization, cold-start efficiency, and throttle response.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto; margin-bottom: 20px;\"\u003e\n  \u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px; min-width: 300px;\"\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eFitment\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e1996-2007 Chevrolet Express 1500 \/ 2500 \/ 3500\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eEngine \/ Chassis\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003eVortec L35, LU3, L30, L31, L29\u003c\/strong\u003e \/ \u003cstrong\u003eGMT600, GMT610\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eStock Output\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e190–290 hp \/ 250–410 lb-ft\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth style=\"padding:10px; text-align: left; border: 1px solid #e0e0e0;\"\u003eReplaces OEM Part #\u003c\/th\u003e\n\u003ctd style=\"padding:10px; border: 1px solid #e0e0e0;\"\u003e\n\u003cstrong\u003e10489421\u003c\/strong\u003e, \u003cstrong\u003eD577\u003c\/strong\u003e, \u003cstrong\u003e19207138\u003c\/strong\u003e, \u003cstrong\u003e19418996\u003c\/strong\u003e, \u003cstrong\u003eDR49T\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1997-2007 Chevrolet Express 4.3L V6 (\u003cstrong\u003eL35 \/ LU3\u003c\/strong\u003e) - uses 6 spark plugs\u003c\/li\u003e\n  \u003cli\u003e1996-2002 Chevrolet Express 5.0L V8 (\u003cstrong\u003eL30\u003c\/strong\u003e) - uses 8 spark plugs\u003c\/li\u003e\n  \u003cli\u003e2001-2002 Chevrolet Express 5.7L V8 (\u003cstrong\u003eL31\u003c\/strong\u003e) - uses 8 spark plugs\u003c\/li\u003e\n  \u003cli\u003e1998-2000 Chevrolet Express 7.4L V8 (\u003cstrong\u003eL29\u003c\/strong\u003e) - uses 8 spark plugs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the GMT600 \/ GMT610 Express?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 1996-2007 Chevrolet Express equipped with the Vortec 4.3L, 5.0L, 5.7L, or 7.4L engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this kit include spark plug wires?\u003c\/strong\u003e\u003cbr\u003e No, this service package includes one ignition coil and eight spark plugs; high-tension secondary ignition wires are sold separately.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Commercial Standard\u003c\/h3\u003e\n\u003cp\u003eFleet and trade operations rely on the Express platform for relentless torque and payload delivery. Maintaining optimal secondary ignition integrity protects catalytic converters from unburned hydrocarbons, ensures uninterrupted towing reliability, and maximizes duty-cycle longevity across all working conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50626030764280,"sku":"DS-EM2FM3GRE","price":74.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-chevrolet-express-1996-2007-4-3l-5-0l-5-7l-7-4l-1.jpg?v=1790353694","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-chevrolet-express-1996-2007-4-3l-5-0l-5-7l-7-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}