{"product_id":"ignition-coil-spark-plugs-for-gmc-yukon-1996-2000-5-7l","title":"Ignition Coil + Spark Plugs for GMC Yukon (1996-2000) 5.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Ignition Coil and Spark Plug Tune-Up Kit for 1996-2000 GMC Yukon (GMT400)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-fit ignition coil and spark plug kit restores secondary ignition voltage and combustion efficiency on the 1996-2000 GMC Yukon to eliminate misfires, hard starts, and rough idling under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Yukon Secondary Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eUnder-hood thermal cycling on the \u003cstrong\u003eGMT400\u003c\/strong\u003e platform degrades the factory epoxy encapsulation inside the stock canister or E-core ignition coil over time. This breakdown causes high-voltage micro-arcing, internal shorting, and reduced dielectric strength. Concurrently, high-mileage copper or platinum plugs in the \u003cstrong\u003eVortec 5700 L31\u003c\/strong\u003e suffer from severe electrode erosion, widening the plug gap past factory specification. The resulting high electrical resistance places excessive demand on aging primary and secondary windings, causing intermittent ignition misfires (DTC P0300 through P0308), unburnt hydrocarbon loading in the catalytic converters, reduced towing capability, and sluggish throttle tip-in.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive service kit replaces worn ignition hardware with precision-wound internal copper primaries and high-grade silicon magnetic steel laminations engineered to deliver sustained 35,000+ volt output. The replacement coil utilizes high-dielectric epoxy potting that resists thermal degradation and moisture intrusion. Paired with eight factory-gapped spark plugs featuring wear-resistant nickel-alloy\/copper core construction, this kit maintains optimal spark kernel energy across all eight cylinders. Replacing the coil and plugs simultaneously restores precise flame propagation inside the combustion chambers, lowering emissions and maintaining optimal dwell time under heavy load conditions without electrical cross-fire.\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;\"\u003e1996-2000 GMC Yukon\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;\"\u003eVortec 5700 L31 \/ GMT400\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;\"\u003e255 hp \/ 330 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;\"\u003e10489421, 19207138, 19418996, 8104894210, D577, DR49\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\u003e1996 GMC Yukon 5.7L V8 (Vortec L31)\u003c\/li\u003e\n  \u003cli\u003e1997 GMC Yukon 5.7L V8 (Vortec L31)\u003c\/li\u003e\n  \u003cli\u003e1998 GMC Yukon 5.7L V8 (Vortec L31)\u003c\/li\u003e\n  \u003cli\u003e1999 GMC Yukon 5.7L V8 (Vortec L31)\u003c\/li\u003e\n  \u003cli\u003e2000 GMC Yukon Denali 5.7L V8 (Vortec L31)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT400 Yukon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1996-2000 GMC Yukon equipped with the \u003cstrong\u003eVortec 5700 L31\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eShould I replace spark plug wires when installing this kit?\u003c\/h4\u003e\n\u003cp\u003eWhile wires are not included, inspecting or renewing high-resistance secondary ignition leads is strongly recommended to ensure consistent voltage delivery to all eight plugs.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for rugged utility and demanding payload duty, this ignition assembly delivers the sustained spark delivery needed to preserve low-end pulling torque and long-range reliability on heavy-duty hauling platforms.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67518829625592,"sku":"DS-EOWAEPJUD","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-gmc-yukon-1996-2000-5-7l-1.jpg?v=1790370721","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-spark-plugs-for-gmc-yukon-1996-2000-5-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}