{"product_id":"ignition-coil-iridium-spark-plugs-wire-for-chevrolet-express-1500-2500-3500-2003-2007-4-8l-5-3l-6-0l","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire for Chevrolet Express 1500 2500 3500 (2003-2007) 4.8L 5.3L 6.0L","description":"\u003ch2\u003eDirect-Replacement Ignition Overhaul Kit for 2003-2007 Chevrolet Express\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e Restores factory secondary ignition output by renewing degraded coil-on-plug units, spark plug wires, and electrodes to eliminate under-load misfires and unburned fuel cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Express Thermal Degradation Problem\u003c\/h3\u003e\n\u003cp\u003eThe enclosed doghouse engine bay of the GMT610 platform subjects ignition hardware to severe heat soak. Factory coil epoxy insulation develops microscopic stress fractures over time, creating internal secondary winding shorts. Concurrently, factory wire jacketing undergoes thermal hardening, leading to carbon tracking and insulation breakdown under load. Worn factory plugs experience electrode erosion that increases the firing gap, over-taxing the driver circuits in the PCM and causing rough idle, hesitation, and catalyst-damaging misfires during heavy hauling.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis complete ignition refresh features eight round-body D585-style coil packs with external heat sinks engineered for superior heat dissipation, hermetically sealed in high-dielectric epoxy with four-pin OEM connectors. Paired with fine-wire iridium spark plugs for low required voltage and stable arc formation across extreme combustion pressures, this kit includes 8mm double-extruded silicone plug wires with high-temp boots and corrosion-resistant stainless-steel locking terminals to isolate secondary voltage and eliminate RF interference.\u003c\/p\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable width=\"100%\" style=\"border-collapse: collapse; border: 1px solid #e0e0e0; font-size: 14px;\"\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e2003-2007 Chevrolet Express\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eEngine \/ Chassis\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eVortec Gen III V8 (LR4, LM7, LQ4) \/ GMT610\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eStock Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003e275–300 hp \/ 290–360 lb-ft (Approx)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eUF262, D585, 41-962, 19299585, 12192195\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2003-2007 Chevrolet Express 1500:\u003c\/strong\u003e 5.3L V8 (Round UF262\/D585 coils)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2003-2007 Chevrolet Express 2500:\u003c\/strong\u003e 4.8L, 5.3L, 6.0L V8 (Round UF262\/D585 coils)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2003-2007 Chevrolet Express 3500:\u003c\/strong\u003e 4.8L, 5.3L, 6.0L V8 (Round UF262\/D585 coils)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Commercial Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eCommercial fleet operations demand consistent cold starts and uncompromised low-end torque under maximum gross combined weight ratings. This full ignition replacement restores reliable combustion dynamics, ensuring heavy loads and continuous towing duty cycles are managed without power loss or heat-induced spark degradation.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50498309488888,"sku":"DS-E890Y0QRP","price":185.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-for-chevrolet-express-1500-2500-3500-2003-2007-4-8l-5-3l-6-0l-1.jpg?v=1789266020","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-iridium-spark-plugs-wire-for-chevrolet-express-1500-2500-3500-2003-2007-4-8l-5-3l-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}