{"product_id":"ignition-coil-spark-plug-for-gmc-envoy-xl-xuv-2005-2009-v8-round-style","title":"Ignition Coil \u0026 Spark Plug for GMC Envoy XL XUV (2005-2009) V8 (Round Style)","description":"\u003ch2\u003eHigh-Output Ignition Coil \u0026amp; Spark Plug Kit for 2005-2009 GMC Envoy\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e This direct plug-and-play coil, wire, and spark plug kit replaces degrading factory ignition components to restore misfire-free power and deliver a 20% increase in spark energy over OE coils.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Envoy Vortec Ignition Shortcomings\u003c\/h3\u003e\n\u003cp\u003eThe factory Delco ignition coils on the 5.3L Vortec V8 engines are notoriously prone to internal epoxy degradation and thermal breakdown over thousands of heat cycles. Mounted directly to the valve covers, these original coils endure relentless under-hood temperatures, leading to micro-cracking in the internal epoxy potting. Once this insulation is compromised, high-voltage leaks occur, resulting in weak spark delivery, erratic idling, engine misfires under load, and delayed throttle response. Furthermore, high-mileage OEM spark plug wires often experience increased electrical resistance and cracked silicon boots, compounding the ignition deficiency and leading to persistent Check Engine Lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition overhaul addresses these specific failure points by utilizing advanced coil architecture with premium epoxy construction and high-conductivity copper wire internals. These round-style UF414\/D514A replacement coils feature an optimized 61:1 turns ratio, generating up to 32,000 volts—a 20% surge in discharge energy compared to standard factory coils. This heightened maximum voltage ensures a more complete and rapid combustion event inside the cylinder, effectively eliminating spark blowout under heavy engine load or towing conditions. Combined with the included 748UU plug wires and 41962 spark plugs, this system guarantees optimal primary resistance (0.660 ohms) and secondary resistance (6.1K ohms), restoring precise engine timing and maximizing fuel burn efficiency.\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;\"\u003e2005-2009 GMC Envoy \/ XL \/ XUV (V8 Models)\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;\"\u003eVortec 5.3L V8 (LH6\/LM4) \/ GMT360, GMT370, GMT305\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;\"\u003e300 hp \/ 330 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;\"\u003eUF414, D514A, 748UU, 41962 (Replaces 12573190, 12570616, 12611424)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCadillac Escalade\u003c\/li\u003e\n  \u003cli\u003eChevrolet Avalanche\u003c\/li\u003e\n  \u003cli\u003eChevrolet Silverado\u003c\/li\u003e\n  \u003cli\u003eChevrolet Suburban\u003c\/li\u003e\n  \u003cli\u003eChevrolet Express\u003c\/li\u003e\n  \u003cli\u003eChevrolet Tahoe\u003c\/li\u003e\n  \u003cli\u003eChevrolet Trailblazer\u003c\/li\u003e\n  \u003cli\u003eGMC Savana\u003c\/li\u003e\n  \u003cli\u003eGMC Yukon\u003c\/li\u003e\n  \u003cli\u003eHummer H3\u003c\/li\u003e\n  \u003cli\u003e\u003cem\u003eNote: Only applicable to vehicles equipped with Round Style Coils (UF414\/D514A). Not suitable for Square Style Coils (UF413\/D510C). Please verify your factory coil shape before installation.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe GMC Caliber\u003c\/h3\u003e\n\u003cp\u003eFor the GMT360 platform, consistent torque delivery is paramount for hauling, towing, and daily drivability. Upgrading your Vortec's ignition system ensures rock-solid reliability, smooth power delivery, and eliminates frustrating ignition-related hesitation when demanding peak performance from your V8.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":49711073755384,"sku":"DS-EATFL4T67","price":179.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plug-for-gmc-envoy-xl-xuv-2005-2009-v8-round-style-1.jpg?v=1782796517","url":"https:\/\/performancechiptuning.com\/fr\/products\/ignition-coil-spark-plug-for-gmc-envoy-xl-xuv-2005-2009-v8-round-style","provider":"Performance Chip Tuning","version":"1.0","type":"link"}