{"product_id":"ignition-coil-and-iridium-spark-plugs-for-chevrolet-colorado-2004-2006-2-8l","title":"Ignition Coil and Iridium Spark Plugs for Chevrolet Colorado (2004-2006) 2.8L","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 restores factory spark energy and stabilizes combustion across the cylinder bank on the 2004-2006 Chevrolet Colorado 2.8L to eliminate misfires and rough idling.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Colorado Atlas Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eThe factory coil-on-plug modules on the \u003cstrong\u003eGMT355\u003c\/strong\u003e platform endure severe thermal cycling directly above the exhaust manifold side of the cylinder head. Over time, engine bay heat degrades the internal copper primary and secondary windings, causing dielectric breakdown within the epoxy insulation. Concurrently, factory copper or platinum plugs experience electrode erosion, widening the spark gap past standard tolerances. This elevated electrical resistance overworks aging coil packs, inducing micro-arcing through dried silicone boots and triggering P0300 through P0304 DTC misfire codes under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement ignition service pack utilizes high-grade magnetic steel cores and copper wire winding with elevated temperature insulation ratings to resist electrical leakage under high thermal stress. Mated with fine-wire iridium-tipped spark plugs, the assembly concentrates spark discharge voltage across a stable 0.040-inch electrode gap. The ultra-dense iridium center electrode resists spark erosion, operating efficiently in high-heat cylinder chambers without fouling, while high-tear-strength fluorosilicone boots isolate voltage spikes directly to the plug terminal, preventing spark blowout under heavy engine 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;\"\u003e2.8L LK5 Vortec 2800 \/ GMT355\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;\"\u003e175 hp \/ 185 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;\"\u003eUF303, 68070492AB, 68070492AC, 68070492AD, KIN119942TOP\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, Z85, Z71 (2.8L L4 LK5)\u003c\/li\u003e\n  \u003cli\u003e2005 Chevrolet Colorado Base, Sport, Sport LS, Z85, Z71 (2.8L L4 LK5)\u003c\/li\u003e\n  \u003cli\u003e2006 Chevrolet Colorado Base, LS, LT, WT, Z85, Z71 (2.8L L4 LK5)\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\u003eLK5\u003c\/strong\u003e 2.8L inline-four engine.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the spark plugs pre-gapped for installation?\u003c\/strong\u003e\u003cbr\u003e Yes, the iridium plugs are preset to factory gap specifications, though inspecting tolerances prior to torquing is recommended practice.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle sustained payload hauling and daily fleet abuse, this ignition kit maintains consistent flame kernel development to preserve low-end torque delivery and fuel efficiency across tough duty cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50593973534968,"sku":"DS-ECKW13Q5V","price":99.95,"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-2004-2006-2-8l-1.jpg?v=1790054862","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-and-iridium-spark-plugs-for-chevrolet-colorado-2004-2006-2-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}