{"product_id":"ignition-coil-iridium-spark-plugs-wire-gmc-sierra-1500-limited-2014-2020-5-3l-6-2l-v8","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire GMC Sierra 1500 Limited (2014-2020) 5.3L 6.2L V8","description":"\u003ch2\u003eHigh-Output Ignition Coil \u0026amp; Iridium Spark Plug Kit for 2014-2020 GMC Sierra\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This complete ignition service kit replaces degraded factory coils, plugs, and wires to restore combustion efficiency, eliminate misfires, and stabilize idle quality in your 5.3L or 6.2L EcoTec3 V8.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Sierra Ignition Shortcomings\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition system on the K2XX and T1XX chassis Sierra is highly susceptible to thermal degradation and electrical resistance over high-mileage heat cycles. The OEM coils utilize standard winding densities that eventually break down, leading to voltage leaks and weak spark propagation. Combined with deteriorating factory spark plug wires lacking adequate thermal shielding against exhaust manifold heat, this resistance manifests as engine hesitation, poor gas mileage, cylinder misfires, and illuminated CEL or VSC warnings under heavy loads or towing conditions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis upgraded ignition package delivers a 20% increase in spark energy over OE parameters, utilizing coils built with high-density copper windings and an epoxy-potted internal construction to prevent moisture intrusion and vibration damage. Pushing up to 26,000 volts with a 61:1 turns ratio, these coils ensure complete and efficient fuel burn. The included high-quality iridium spark plugs (41-114) feature an ultra-high melting point for consistent, powerful arcs, while the 8mm silicone spark plug wires feature integrated heat shields to withstand extreme exhaust temperatures without degrading electrical conductivity. This optimized spark delivery translates to restored horsepower, sharper throttle response, and a rock-solid idle.\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;\"\u003e2014-2020 GMC Sierra 1500 (Including Limited)\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;\"\u003eEcoTec3 L83, L86, L87 V8 \/ K2XX, T1XX\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;\"\u003e355 - 420 hp \/ 383 - 460 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;\"\u003eUF742 (Coils), 41-114 (Plugs), 748UU (Wires)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2014 GMC Sierra 1500 5.3L \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2015 GMC Sierra 1500 5.3L \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2016 GMC Sierra 1500 5.3L \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2017 GMC Sierra 1500 5.3L \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2018 GMC Sierra 1500 5.3L \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2019 GMC Sierra 1500 Limited 5.3L \/ 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2020 GMC Sierra 1500 5.3L \/ 6.2L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eWhether hauling heavy payloads or navigating daily commutes, a robust ignition system is critical for your V8 truck's reliability. This comprehensive tune-up kit ensures your Sierra delivers consistent towing power, optimal fuel economy, and dependable cross-country durability without the risk of misfire-induced downtime.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48477764288760,"sku":"DS-EXKW1HCNS","price":219.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-gmc-sierra-1500-limited-2014-2020-5-3l-6-2l-v8-1.jpg?v=1779380137","url":"https:\/\/performancechiptuning.com\/products\/ignition-coil-iridium-spark-plugs-wire-gmc-sierra-1500-limited-2014-2020-5-3l-6-2l-v8","provider":"Performance Chip Tuning","version":"1.0","type":"link"}