{"product_id":"ignition-coil-and-iridium-spark-plugs-for-chevrolet-colorado-2004-2006-3-5l","title":"Ignition Coil and Iridium Spark Plugs for Chevrolet Colorado (2004-2006) 3.5L","description":"\u003ch2\u003eDirect-Fit Ignition Coil and Iridium Spark Plug Kit for 2004-2006 Chevrolet Colorado\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and iridium spark plug kit replaces aged factory coil packs and eroded plugs on the 2004-2006 Colorado to eliminate cylinder misfires, restore combustion efficiency, and stabilize idle quality.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Colorado Thermal Breakdown Problem\u003c\/h3\u003e\n\u003cp\u003eIn the \u003cstrong\u003eGMT355\u003c\/strong\u003e platform housing the \u003cstrong\u003eVortec 3500 L52\u003c\/strong\u003e inline-five, factory pencil coils reside directly above the cylinder head in deep spark plug wells. Continuous engine heat cycling causes the factory dielectric epoxy and silicone insulation to degrade, leading to secondary voltage breakdown and spark arcing. This deterioration causes intermittent hesitation, reduced power under towing loads, and classic P0300 through P0305 misfire diagnostic trouble codes. Concurrently, factory plugs suffer electrode erosion over time, which widens the spark gap and places excessive electrical resistance on the failing primary and secondary ignition windings.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis complete 5-cylinder service kit pairs direct-replacement ignition coils with high-efficiency fine-wire iridium spark plugs to re-establish high-voltage ignition delivery. Engineered with reinforced copper wire windings, thermal-resistant internal epoxy, and high-dielectric silicone boots, these coils resist voltage tracking and moisture intrusion. The accompanying iridium spark plugs feature a laser-welded fine-wire center electrode with superior thermal endurance, reducing the required firing voltage, providing stable flame kernel propagation, and shielding the coil packs from excessive resistance under high load.\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; margin-bottom: 20px;\"\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;\"\u003e2004-2006 Chevrolet Colorado\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 3500 L52\u003c\/strong\u003e 3.5L I5 \/ \u003cstrong\u003eGMT355\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;\"\u003e220 hp \/ 225 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\u003eUF303\u003c\/strong\u003e, \u003cstrong\u003e19300921\u003c\/strong\u003e, \u003cstrong\u003eGN10114\u003c\/strong\u003e, \u003cstrong\u003e1788390\u003c\/strong\u003e, \u003cstrong\u003e6737200\u003c\/strong\u003e, \u003cstrong\u003eCUF303\u003c\/strong\u003e, \u003cstrong\u003e5C1392\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2004 Chevrolet Colorado (Base, LS, Sport, Z71, Z85) 3.5L L5\u003c\/li\u003e\n  \u003cli\u003e2005 Chevrolet Colorado (Base, LS, Sport, Z71, Z85) 3.5L L5\u003c\/li\u003e\n  \u003cli\u003e2006 Chevrolet Colorado (LS, LT, WT) 3.5L L5\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eDoes this fit the GMT355 Colorado?\u003c\/strong\u003e\u003cbr\u003e Yes, this is a direct fit for the 2004-2006 Chevrolet Colorado equipped with the \u003cstrong\u003eVortec 3500 L52\u003c\/strong\u003e engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these iridium spark plugs require manual gapping before installation?\u003c\/strong\u003e\u003cbr\u003e No, these plugs come pre-gapped to factory specifications; attempting to adjust the gap manually can fracture the fine-wire iridium electrode.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Truck Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for daily hauling and commercial fleet duty, restoring peak spark energy to the Atlas platform recovers lost low-end torque, maintains smooth cruising efficiency, and ensures reliable cold-start ignition across demanding work cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50604204589304,"sku":"DS-ET9Q86M1T","price":94.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-and-iridium-spark-plugs-for-chevrolet-colorado-2004-2006-3-5l-1.jpg?v=1790088735","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-and-iridium-spark-plugs-for-chevrolet-colorado-2004-2006-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}