{"product_id":"ignition-coil-spark-plugs-for-gmc-c2500-c3500-k2500-k3500-1996-2000-5-7l-7-4l","title":"Ignition Coil + Spark Plugs for GMC C2500 C3500 K2500 K3500 (1996-2000) 5.7L 7.4L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect Replacement Ignition Coil \u0026amp; Spark Plug Tune-Up Kit for 1996-2000 GMC C\/K Trucks (GMT400)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The ignition coil and spark plug kit replaces aged factory ignition hardware on 1996-2000 GMC C\/K Trucks to eliminate secondary ignition breakdown, misfires, and unburnt fuel cycles under heavy payload demands.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC C\/K Trucks Thermal Breakdown and Voltage Leakage\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition setup on \u003cstrong\u003eGMT400\u003c\/strong\u003e platform trucks routinely encounters dialectric failure at the external ignition coil and thermal erosion across the spark plug electrode gaps. Located within an engine bay prone to severe thermal soak, the stock epoxy potting within the factory coil degrades over time. This leads to internal primary-to-secondary winding shorts, insulation breakdown, and micro-arcing. Simultaneously, extended service intervals erode the standard copper or nickel spark plug gaps on the \u003cstrong\u003eVortec 5700 L31\u003c\/strong\u003e and \u003cstrong\u003eVortec 7400 L29\u003c\/strong\u003e powerplants. The widening gap increases primary coil dwell strain and demands higher secondary strike voltage, culminating in high-load hesitation, rough idle, and DTC P0300 misfire codes during high-temperature towing cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive tune-up assembly delivers matched impedance and high-voltage dielectric isolation tailored to factory dwell tables. The replacement ignition coil features high-grade magnetic steel core laminations wound with high-purity copper wire, encased in high-dielectric epoxy to resist high-heat vibration and moisture penetration. The kit matches 8 matched-gap spark plugs engineered with high-alumina ceramic insulators and erosion-resistant electrode metallurgy. This direct-replacement kit replaces OE numbers like \u003cstrong\u003e10489421\u003c\/strong\u003e and \u003cstrong\u003eD577\u003c\/strong\u003e, restoring arc energy, maintaining stable spark duration across the entire RPM range, and preventing unburnt hydrocarbons from fouling downstream catalytic converters.\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 C2500, C3500, K2500, K3500\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 5.7L (L31) \/ 7.4L (L29) \/ 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;\"\u003e255-290 hp \/ 330-410 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;\"\u003e10489421, D577, 19207138, 19418996, C1098VC\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\u003e1996-2000 GMC C2500 5.7L V8\u003c\/li\u003e\n  \u003cli\u003e1996-2000 GMC C3500 5.7L V8\u003c\/li\u003e\n  \u003cli\u003e1996-2000 GMC C3500 7.4L V8\u003c\/li\u003e\n  \u003cli\u003e1996-2000 GMC K2500 5.7L V8\u003c\/li\u003e\n  \u003cli\u003e1996-2000 GMC K2500 7.4L V8\u003c\/li\u003e\n  \u003cli\u003e1996-2000 GMC K3500 5.7L V8\u003c\/li\u003e\n  \u003cli\u003e1996-2000 GMC K3500 7.4L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT400 C\/K Trucks?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1996-2000 GMC C\/K Trucks equipped with the Vortec L31 (5.7L) or Vortec L29 (7.4L) engines.\u003c\/p\u003e\n\n\u003ch4\u003eAre spark plug wires included in this service pack?\u003c\/h4\u003e\n\u003cp\u003eNo, this package includes only the single high-voltage external ignition coil and 8 matching spark plugs; secondary HT leads are sold separately.\u003c\/p\u003e\n\n\u003ch3\u003eThe Heavy-Duty GMC Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle sustained commercial hauling and demanding tongue weights, this ignition refresh restores the raw low-end torque curves and combustion consistency necessary to keep heavy-duty GMT400 chassis working reliably under full gross vehicle weight ratings.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67518815764728,"sku":"DS-EOP6OLKSJ","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-c2500-c3500-k2500-k3500-1996-2000-5-7l-7-4l-1.jpg?v=1790370518","url":"https:\/\/performancechiptuning.com\/es\/products\/ignition-coil-spark-plugs-for-gmc-c2500-c3500-k2500-k3500-1996-2000-5-7l-7-4l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}