{"title":"Ignition Coils for Chevrolet Silverado","description":"\u003ch2\u003eReliable Ignition Solutions for Chevrolet Silverado Trucks\u003c\/h2\u003e\n\u003cp\u003eHard-working trucks place severe demands on secondary ignition systems. Heat fatigue, carbon tracing, and aging boots cause intermittent spark breakdown that shows up as stumbling acceleration or a flashing check engine light during heavy hauling. Our inventory delivers direct-replacement \u003cstrong\u003eignition coils for Chevrolet Silverado\u003c\/strong\u003e covering select half-ton and heavy-duty platforms from 1999 through 2020. Whether servicing an everyday work truck or pairing with \u003ca href=\"\/collections\/chevrolet-silverado-air-intake\"\u003ecold air intakes for Chevrolet Silverado\u003c\/a\u003e, fresh coils restore combustion stability and engine efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eCoverage for Small Blocks, Big Blocks, and Modern HD Engines\u003c\/h3\u003e\n\u003cp\u003eBecause GM utilized multiple coil architectures across generations, selecting the right physical fitment is essential. Our inventory addresses select configurations across classic 4.3L V6 engines, popular Vortec 4.8L, 5.3L, 6.0L, and 6.2L small blocks, the 8.1L big-block V8 in 2500 HD \/ 3500 HD workhorses, and late-model 6.6L L8T gas platforms. Browse our wider catalog of \u003ca href=\"\/collections\/chevrolet-ignition\"\u003eignition parts for Chevrolet\u003c\/a\u003e or dedicated \u003ca href=\"\/collections\/performance-ignition\"\u003eperformance ignition\u003c\/a\u003e upgrades for related platforms.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch3\u003eWhich Chevrolet Silverado model years and engines are supported?\u003c\/h3\u003e\n\u003cp\u003eOur catalog covers select applications between 1999 and 2020. Supported engines include the 4.3L V6, 4.8L, 5.3L, 6.0L, 6.2L, 6.6L gas HD, and 8.1L V8. Always verify your specific model year, truck class (1500, 2500 HD, 3500 HD), and existing coil shape before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eWill replacing my ignition coils fix a P0300 misfire code?\u003c\/h3\u003e\n\u003cp\u003eA random\/multiple misfire code (P0300) or cylinder-specific codes (P0301–P0308) frequently stem from failing coil windings, cracked boots, or fouled plugs. Swapping out tired coils with fresh hardware restores voltage output and directly resolves spark-induced misfires.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I know if my truck requires round-style coils?\u003c\/h3\u003e\n\u003cp\u003eGM equipped select 2007–2016 Vortec engines with either round (Melco) or square (Delphi) coil bodies. Inspect your existing valve cover mounting brackets: round coils feature a cylindrical casing, while square coils have a squarish stamped-steel frame.\u003c\/p\u003e\n\n\u003ch3\u003eShould I replace just the coils or install a full tune-up kit?\u003c\/h3\u003e\n\u003cp\u003eIf your truck has surpassed 80,000 to 100,000 miles, purchasing a complete kit with ignition coils, iridium spark plugs, and heat-resistant plug wires ensures balanced resistance across all cylinders and prevents premature failure of new coils.\u003c\/p\u003e","products":[{"product_id":"high-performance-ignition-coil-for-chevrolet-silverado-1500-2500-hd-3500-hd-2007-2019-4-8l-5-3l-6-0l-6-2l","title":"High Performance Ignition Coil for Chevrolet Silverado 1500 2500 HD 3500 HD (2007-2019) 4.8L 5.3L 6.0L 6.2L","description":"\u003ch2\u003eUpgraded Ignition Coil Set for 2007-2019 Chevrolet Silverado (Gen IV\/V V8 \/ GMT900 \u0026amp; K2XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eUpgrades the factory ignition system with higher secondary voltage output to eliminate under-load misfires, improve idle stability, and support heavy-duty towing applications.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eThe OEM ignition coils on the 2007-2019 Gen IV and Gen V GM V8 engines (including the 4.8L, 5.3L, 6.0L, and 6.2L blocks) are notorious for degrading under sustained heat cycles. The factory coil packs rely on standard winding materials and sub-par epoxy potting compounds that eventually break down over tens of thousands of miles. This thermal degradation leads to internal micro-arcing, weakened spark energy, and increased primary resistance. When the spark output drops, the engine experiences under-load misfires, rough idling, hesitation during acceleration, and reduced fuel economy. This becomes exceptionally problematic when hauling heavy loads or navigating steep grades, as the increased cylinder pressures require maximum spark energy to prevent blow-out and ensure complete, efficient combustion.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThe UF414 upgraded ignition coils resolve these thermal and electrical shortcomings by utilizing high-grade copper wire for both primary and secondary windings, significantly increasing the internal turns ratio. This redesign ensures a stronger magnetic field and yields a much higher secondary voltage output compared to the OEM units. Furthermore, the coils are sealed using an advanced, high-temperature dielectric epoxy that effectively resists heat soak from the cylinder block and exhaust manifolds. The heavy-duty silicone boots provide superior flashover protection, preventing voltage leaks to the cylinder head casting. By delivering a fatter, hotter spark, these upgraded coils ensure total air\/fuel mixture combustion even under peak cylinder pressures, resulting in a smoother powerband, restored torque, and reliable ignition timing during demanding operational cycles.\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;\"\u003e2007-2019 Chevrolet Silverado (1500, 2500 HD, 3500 HD)\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;\"\u003eGen IV \u0026amp; Gen V V8 (4.8L, 5.3L, 6.0L, 6.2L) \/ GMT900 \u0026amp; K2XX\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;\"\u003e295-420 hp \/ 305-460 lb-ft (Approx, depending on displacement)\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 (Set of 8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2007-2019 Chevrolet Silverado 1500 (4.8L V8)\u003c\/li\u003e\n  \u003cli\u003e2007-2019 Chevrolet Silverado 1500 (5.3L V8)\u003c\/li\u003e\n  \u003cli\u003e2007-2019 Chevrolet Silverado 1500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2007-2019 Chevrolet Silverado 1500 (6.2L V8)\u003c\/li\u003e\n  \u003cli\u003e2007-2019 Chevrolet Silverado 2500 HD (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2007-2019 Chevrolet Silverado 3500 HD (6.0L V8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to withstand the severe duty cycles of towing and heavy payload hauling. These ignition coils ensure your Silverado maintains consistent pulling power, precise ignition timing, and unwavering reliability whether on the job site or navigating steep highway grades.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48234158883064,"sku":"DS-EBBVECYZS","price":189.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-performance-ignition-coil-for-chevrolet-silverado-1500-2500-hd-3500-hd-2007-2019-4-8l-5-3l-6-0l-6-2l-1.jpg?v=1776098465"},{"product_id":"high-performance-ignition-coils-for-chevrolet-silverado-1999-2007-4-8l-5-3l-6-0l","title":"High Performance Ignition Coils for Chevrolet Silverado (1999-2007) 4.8L 5.3L 6.0L","description":"\u003ch2\u003eHigh-Output Ignition Coils for 1999-2007 Chevrolet Silverado (Vortec V8 \/ GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eReplaces aging, degraded factory coils to restore proper spark energy, eliminate high-RPM misfires, and improve combustion efficiency across all Vortec V8 powerplants.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Ignition Weakness\u003c\/h3\u003e\n\u003cp\u003eThe factory D585 and similar OEM GM ignition coils are notorious for thermal degradation over time. Subjected to extreme under-hood temperatures and constant heat cycling from the cast-iron exhaust manifolds, the internal epoxy potting breaks down, leading to micro-cracks in the coil housing. Once the insulation is compromised, high voltage leaks to the block, causing intermittent misfires, rough idling, hesitation under heavy towing loads, and diminished fuel economy. Additionally, stock blade terminals often corrode due to moisture intrusion, increasing electrical resistance and further weakening the spark output precisely when the LS-based engine demands it most during open-loop acceleration.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThese high-performance replacement coils are engineered with upgraded primary and secondary copper windings to deliver a higher voltage output and a faster recharge time (dwell). Encased in a superior high-temperature-resistant epoxy and featuring reinforced oval-shaped female connectors, they completely mitigate the heat soak and cracking issues endemic to the factory units. The precision-machined male terminals ensure minimal voltage drop, translating directly to a stronger, more consistent spark. This direct bolt-on upgrade guarantees optimal burn efficiency, smoothing out the idle, restoring lost low-end torque, and preventing spark blowout under heavy loads or high RPMs.\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;\"\u003e1999-2007 Chevrolet Silverado (4.8L, 5.3L, 6.0L)\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 Gen III \u0026amp; IV (LR4, LM7, LQ4, LQ9) \/ GMT800 \u0026amp; GMT900\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;\"\u003e270-345 hp \/ 285-380 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;\"\u003e920-1020, SKIC121, CUF262, D585, UF262T, 10457730, 12563293, 19005218, 8104577300, EBC1347, IGC0127\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding:8px;\"\u003e\u003cstrong\u003eCoil Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px;\"\u003eElectronic Bolt-On\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1999-2007 Chevrolet Silverado 1500 (4.8L V8)\u003c\/li\u003e\n  \u003cli\u003e1999-2007 Chevrolet Silverado 1500 (5.3L V8)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Silverado 1500 (6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e1999-2007 Chevrolet Silverado 2500 \/ 2500 HD (5.3L, 6.0L V8)\u003c\/li\u003e\n  \u003cli\u003e2001-2007 Chevrolet Silverado 3500 (6.0L V8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eWhether you are hauling heavy payloads, towing a fifth wheel, or navigating rugged job sites, dependable ignition is non-negotiable. This upgraded coil pack system ensures your Silverado maintains the rugged reliability and relentless torque the Vortec V8 platform is legendary for.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48234270097656,"sku":"DS-EMHX8V6CI","price":149.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/Ignition-Chevy-V8.jpg?v=1776103425"},{"product_id":"ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-1500-legacy-2014-2020-5-3l-6-2l-v8","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire Chevrolet Silverado 1500 Legacy (2014-2020) 5.3L 6.2L V8","description":"\u003ch2\u003eHigh-Output Ignition Coil \u0026amp; Iridium Spark Plug Kit for 2014-2020 Chevrolet Silverado\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eResolves ignition system failures by delivering a 20-percent increase in spark energy over factory components, ensuring complete combustion for the EcoTec3 V8.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Ignition Weakness\u003c\/h3\u003e\n\u003cp\u003eThe GM EcoTec3 5.3L and 6.2L V8 engines are highly susceptible to under-hood heat soak, which progressively degrades the factory ignition coils and spark plug wires. Over extended mileage cycles, the thermal cycling breaks down the OEM coil's internal epoxy potting and compromises the secondary windings. This degradation manifests as internal voltage leakage, increased secondary electrical resistance, and a weak spark kernel. For the driver, this directly translates to cylinder misfires (often triggering P0300-series diagnostic trouble codes), rough idling, delayed throttle response, and a noticeable drop in overall fuel efficiency. Standard factory wires further exacerbate this issue as their insulation hardens and cracks, causing parasitic voltage loss and increased electromagnetic interference.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition overhaul addresses these specific failure points through enhanced material selection and electrical design. The upgraded UF742 coils utilize pure copper primary and secondary windings encased in a high-dielectric epoxy, achieving a 61:1 turns ratio that safely outputs up to 26,000 volts—a 20-percent energy increase over stock components. High-temperature resistant silicone boots and high-density sleeves prevent voltage flashover. To harness this increased voltage, the kit includes 41-114 Iridium spark plugs. The ultra-fine iridium center electrode provides an extremely high melting point, yielding a concentrated, stable spark kernel for maximum combustion efficiency. Finally, the included 8mm spark plug wires feature robust heat shields and a high-suppression core to deliver peak voltage to the plug while eliminating RFI\/EMI electronic interference, effectively restoring factory drivability and peak engine 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;\"\u003e2014-2020 Chevrolet Silverado 1500\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;\"\u003eL83, L86 (EcoTec3 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;\"\u003eUF-742, 41-114, 748UU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2014-2020 Chevrolet Silverado 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2014-2020 Chevrolet Silverado 1500 6.2L V8\u003c\/li\u003e\n  \u003cli\u003e2019 Chevrolet Silverado 1500 LD (Legacy) 5.3L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle harsh thermal environments and high engine loads, this complete ignition package restores the heavy-duty reliability required for hauling and towing while optimizing the V8 power delivery of your Silverado.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48477694755064,"sku":"DS-EUZXTJO20","price":224.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-1500-legacy-2014-2020-5-3l-6-2l-v8-1.jpg?v=1779379910"},{"product_id":"ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-2500-hd-3500-hd-2020-6-6l-v8","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire Chevrolet Silverado 2500 HD 3500 HD (2020) 6.6L V8","description":"\u003ch2\u003eHigh-Energy Ignition Coil \u0026amp; Iridium Spark Plug Kit for Chevrolet Silverado\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eReplaces failing factory ignition components to restore proper combustion, eliminate misfires, and improve throttle response under heavy loads.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eThe Stock Silverado L8T Heat Soak Problem\u003c\/h3\u003e\n\u003cp\u003eThe stock Silverado L8T ignition system degrades over time due to intense thermal cycling under the hood, especially when towing or hauling heavy payloads. Continuous high-temperature exposure breaks down the factory coil epoxy and degrades spark plug electrodes, leading to increased electrical resistance. This manifests as weak spark output, engine misfires, rough idling, hesitation during acceleration, and inevitable Check Engine Light (CEL) or StabiliTrak\/VSC warnings. Left unaddressed, poor ignition efficiency accelerates fuel waste and exhaust emissions.\u003c\/p\u003e\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition overhaul kit is engineered to exceed OE specifications, delivering a 20% increase in spark energy and stepping up voltage to a maximum of 26,000 Volts (61:1 turns ratio). The UF742 coils feature premium internal copper windings and high-temperature epoxy construction to resist heat soak and heavy-duty vibration. Paired with 41-114 iridium spark plugs—chosen for their extremely high melting point and superior conductivity—this setup ensures a powerful, consistent spark event. The included 8mm spark plug wires utilize a high-density silicone sleeve and specialized heat shields to eliminate RFI electronic interference and prevent cross-firing, ensuring maximum voltage transfer directly to the combustion chamber.\u003c\/p\u003e\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;\"\u003eChevrolet Silverado 2500 HD \/ 3500 HD\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;\"\u003e6.6L V8 L8T \/ 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;\"\u003e401 hp \/ 464 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, 41-114, 748UU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2020 Chevrolet Silverado 2500 HD 6.6L V8 (Gasoline)\u003c\/li\u003e\n\u003cli\u003e2020 Chevrolet Silverado 3500 HD 6.6L V8 (Gasoline)\u003c\/li\u003e\n\u003cli\u003eReplaces OE Coils: 12658183, 12621750, 12674754, 12699383, 12708496, 5C1876, U5265, 48881, C1819, C866, GN10165\u003c\/li\u003e\n\u003cli\u003eReplaces OE Wires: 12192195, 12622553, 88862397, 12192192, 9748GG, 748GG, 7873\u003c\/li\u003e\n\u003cli\u003eReplaces OE Plugs: 41-114\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eThe Chevrolet Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned to endure the grueling demands of heavy towing, payload hauling, and continuous job-site idling, these upgraded ignition components ensure your heavy-duty Silverado maintains optimal power delivery and reliability.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":48477711794424,"sku":"DS-EEV3M15F0","price":224.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-chevrolet-silverado-2500-hd-3500-hd-2020-6-6l-v8-1.jpg?v=1779379963"},{"product_id":"ignition-coil-spark-plug-for-chevy-silverado-1500-2500-hd-2007-2016-v8-round-style","title":"Ignition Coil \u0026 Spark Plug for Chevy Silverado 1500 2500 HD (2007-2016) V8 (Round Style)","description":"\u003ch2\u003eHigh-Output Ignition Coil \u0026amp; Spark Plug Kit for 2007-2016 Chevrolet Silverado\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eReplaces failing OEM ignition coils and worn spark plugs to eliminate misfires, restore consistent spark delivery, and provide 20% greater discharge energy for optimal combustion.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Ignition System Weakness\u003c\/h3\u003e\n\u003cp\u003eFactory GM Gen IV V8 ignition coils and older plug wires are notoriously susceptible to thermal breakdown and internal resistance spikes over high-mileage cycles. The constant heat cycling generated by the cast iron or aluminum engine blocks degrades the internal epoxy potting of the OEM coils. This degradation causes microscopic cracking, which leads to voltage leakage, high-rpm misfires, rough idling, and poor fuel efficiency. Furthermore, standard carbon-core wires degrade from ambient underhood temperatures, increasing resistance and weakening the spark before it reaches the combustion chamber.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit replacement package overhauls the ignition circuit using upgraded round-style D514A\/UF414 coil packs, 748UU spark plug wires, and 41962 spark plugs. The redesigned coils utilize high-grade internal copper windings and advanced epoxy resin construction to withstand extreme thermal loads without cracking. These units are engineered to produce a maximum voltage output of 32,000V—a 20% increase in discharge energy compared to standard OEM units. The higher 61:1 turns ratio ensures a robust, consistent spark arc across the plug gap, reducing the risk of blowout under heavy load or towing conditions. This translates to smoother acceleration and stabilized idle characteristics.\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;\"\u003e2007-2016 Chevrolet Silverado 1500 \u0026amp; 2500 HD (Round Style Coils)\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;\"\u003eGen IV LS \/ Vortec V8 \/ GMT900 \u0026amp; K2XX\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;\"\u003e315-360 hp \/ 335-380 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\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 1500 \u0026amp; 2500 HD\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\n\u003cstrong\u003eNote:\u003c\/strong\u003e Only fits models equipped with Round Style Coils (D514A \/ UF414). Does NOT fit Square Style Coils (D510C \/ UF413). Verify factory coils before installation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eWhether hauling heavy payloads or towing trailers, maintaining optimal ignition health ensures your Silverado's V8 delivers the uncompromised torque, fuel efficiency, and heavy-duty reliability required for demanding utility applications.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":49711000486136,"sku":"DS-E0BQO9P9R","price":184.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plug-for-chevy-silverado-1500-2500-hd-2007-2016-v8-round-style-1.jpg?v=1782796283"},{"product_id":"ignition-coil-spark-plugs-for-chevrolet-c3500-silverado-2500-hd-3500-hd-2001-2002-8-1l-v8","title":"Ignition Coil \u0026 Spark Plugs for Chevrolet C3500 Silverado 2500 HD 3500 HD (2001-2002) 8.1L V8","description":"\u003ch2\u003eDirect-Replacement Ignition Coil \u0026amp; Spark Plug Kit for 2001-2002 Chevrolet Silverado\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eRestores proper engine firing and eliminates misfires for heavy-duty towing applications.\u003c\/strong\u003e This complete ignition package replaces failing coils, degraded wires, and worn spark plugs on the 8.1L Vortec to ensure maximum voltage delivery under load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Ignition Degradation\u003c\/h3\u003e\n\u003cp\u003eThe factory ignition system on the GMT800 platform, particularly when paired with the massive 8.1L L18 big-block, is highly susceptible to severe thermal stress. Nestled deep within the engine bay, the OEM ignition coils endure constant heat cycles that eventually break down the internal epoxy resin. Over time, this thermal degradation leads to micro-cracking in the coil housing and primary wire insulation, causing electrical shorts, voltage leaks, and intermittent misfires. Furthermore, standard factory plug wires suffer from rapid carbon core breakdown under high under-hood temperatures, resulting in weak spark energy, rough idling, poor fuel economy, and diminished towing capacity when you need it most.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive ignition kit engineered for the Vortec 8100 addresses heat-induced failures by utilizing upgraded materials. The ignition coils are wound with high-grade copper wire and encapsulated in advanced thermal-resistant epoxy to prevent pinholes, cracking, and internal short-circuiting. By stabilizing magnetic flux efficiency, these coils deliver consistent, high-energy spark output even under extreme load conditions. The included spark plug wires feature thick silicone jackets to repel oil and withstand extreme engine bay heat, preventing cross-firing and voltage drop. Combined with fresh spark plugs matched to the L18 combustion chamber parameters, this kit restores low-emissions operation and guarantees optimal ignition timing, completely eliminating hesitation and heavy-load misfires.\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;\"\u003e2001-2002 Chevrolet Silverado 2500 HD \/ 3500 HD\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;\"\u003eL18 Vortec 8100 V8 \/ GMT800\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;\"\u003e340 hp \/ 455 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;\"\u003e12556450, 12558948, D580, UF192\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2001-2002 Chevrolet Silverado 2500 HD 8.1L V8\u003c\/li\u003e\n  \u003cli\u003e2001-2002 Chevrolet Silverado 3500 HD 8.1L V8\u003c\/li\u003e\n  \u003cli\u003e2001-2002 Chevrolet C3500 8.1L V8\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for the rigorous demands of heavy-duty hauling, this upgraded ignition kit ensures your 8.1L big-block maintains the low-end torque and reliability required to pull maximum payloads without hesitation or erratic misfires.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50065383719160,"sku":"DS-EJ6OY7MDE","price":245.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-spark-plugs-for-chevrolet-c3500-silverado-2500-hd-3500-hd-2001-2002-8-1l-v8-1.webp?v=1785257088"},{"product_id":"ignition-coil-iridium-spark-plugs-wire-for-chevrolet-silverado-1500-2500-2500hd-3500-1999-2007-4-8l-5-3l-6-0l","title":"Ignition Coil \u0026 Iridium Spark Plugs \u0026 Wire for Chevrolet Silverado 1500 2500 2500HD 3500 (1999-2007) 4.8L 5.3L 6.0L","description":"\u003ch2\u003eHigh-Output Round D585 Ignition Service Kit for 1999-2007 Chevrolet Silverado\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrimary Function:\u003c\/strong\u003e Restores factory secondary ignition voltage and prevents secondary breakdown across the cylinder banks on GM Vortec V8 applications.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Silverado Ignition Breakdown\u003c\/h3\u003e\n\u003cp\u003eFactory ignition coils and plug wires on GMT800 platform trucks routinely suffer from thermal cycling fatigue. Situated directly above the cast-iron exhaust manifolds, factory ignition leads endure extreme radiant heat soak that degrades silicone boots, dries out dielectric insulation, and introduces high resistance. Over time, internal epoxy potting in aging OE coils develops micro-fractures, prompting internal arcing, erratic secondary discharge under load, and intermittent P0300 misfires during sustained heavy towing. Worn factory plugs increase arc gap resistance, which strains primary ignition drivers and accelerates coil deterioration.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis complete ignition overhaul kit utilizes high-saturation D585\/UF262 round-body ignition coils featuring vacuum-infused epoxy potting and 4-pin direct-fit connectors to resist dielectric breakdown. Paired with 8mm dual-layer silicone spark plug wires built with stranded copper cores and stainless steel thermal terminal heat shields, the assembly isolates secondary voltage paths against manifold heat soak up to 450°F. The included fine-wire 41-962 iridium spark plugs provide stable flame kernel propagation and reduced quenching, delivering steady combustion pressure and reliable cold-start arc stability.\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;\"\u003e1999-2007 Chevrolet Silverado\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 4.8L (LR4), 5.3L (LM7\/L59\/L33), 6.0L (LQ4\/LQ9) \/ GMT800\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;\"\u003e270-345 hp \/ 285-380 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;\"\u003eUF262, D585, 41-962, 12622553, 19299585\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1999-2006 Chevrolet Silverado 1500:\u003c\/strong\u003e 4.8L V8, 5.3L V8, 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2007 Chevrolet Silverado 1500 Classic:\u003c\/strong\u003e 4.8L V8, 5.3L V8, 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e1999-2000 Chevrolet Silverado 2500:\u003c\/strong\u003e 5.3L V8, 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2001-2006 Chevrolet Silverado 2500 HD:\u003c\/strong\u003e 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2007 Chevrolet Silverado 2500 HD Classic:\u003c\/strong\u003e 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2001-2006 Chevrolet Silverado 3500:\u003c\/strong\u003e 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e2007 Chevrolet Silverado 3500 Classic:\u003c\/strong\u003e 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e\n\u003cem\u003eNote:\u003c\/em\u003e Requires round-body D585\/UF262 coil brackets. Does not replace square Melco UF271 coils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eThe Chevrolet Hauling Caliber\u003c\/h3\u003e\n\u003cp\u003eMaintains consistent dwell-time recovery and maximum secondary kilovolt output under heavy payload and grade-towing conditions, eliminating cylinder misfire events and preserving catalytic converter efficiency.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50498308112632,"sku":"DS-EEP53RQR4","price":185.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/ignition-coil-iridium-spark-plugs-wire-for-chevrolet-silverado-1500-2500-2500hd-3500-1999-2007-4-8l-5-3l-6-0l-1.jpg?v=1789265904"},{"product_id":"ignition-coil-spark-plugs-for-chevrolet-silverado-1999-2007-4-3l","title":"Ignition Coil + Spark Plugs for Chevrolet Silverado (1999-2007) 4.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Performance Ignition Coil and Spark Plug Kit for 1999-2007 Chevrolet Silverado (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The direct-replacement ignition kit restores correct secondary ignition voltage and combustion stability on the 1999-2007 Silverado to eliminate hard misfires and optimize fuel economy.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Silverado Ignition Failure Points\u003c\/h3\u003e\n\u003cp\u003eOn the \u003cstrong\u003eGMT800\u003c\/strong\u003e platform equipped with the \u003cstrong\u003eVortec 4300\u003c\/strong\u003e V6, factory ignition components endure intense underhood thermal cycling. Over mileage, the stock internal winding insulation breaks down, causing epoxy potting micro-fractures that induce dielectric flashover and secondary voltage drops. Coupled with thermal electrode erosion on factory plugs, secondary circuit resistance rises significantly. This leads to intermittent cylinder starvation, erratic idle, P0300 diagnostic trouble codes, and lost low-end torque under heavy payload or towing demands.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement kit resolves voltage drop by pairing an upgraded high-output coil with heavy-duty spark plugs. Built to supersede OEM reference \u003cstrong\u003e10489421\u003c\/strong\u003e and \u003cstrong\u003eD577\u003c\/strong\u003e, the replacement coil features high-grade copper primary and secondary windings encased in void-free epoxy resin for superior thermal dissipation and arching resistance. The included plugs feature corrosion-resistant nickel-alloy shells and durable center electrodes engineered to sustain consistent gap spacing under sustained combustion pressures, delivering crisp throttle response and stable burn rates.\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;\"\u003e1999-2007 Chevrolet Silverado\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 4300 (LU3 \/ L35) \/ GMT800\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;\"\u003e200 hp \/ 260 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, DR49T, 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\u003e1999-2006 Chevrolet Silverado 1500 4.3L\u003c\/li\u003e\n  \u003cli\u003e2007 Chevrolet Silverado 1500 Classic 4.3L\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT800 Silverado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 1999-2007 Chevrolet Silverado equipped with the Vortec 4300 engine.\u003c\/p\u003e\n\n\u003ch4\u003eWhy are 8 spark plugs included for a 6-cylinder truck?\u003c\/h4\u003e\n\u003cp\u003eThe kit supplies 8 plugs to provide two spare units alongside the 6 required for the 4.3L V6 service.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eWorking trucks demand rock-solid ignition reliability under heavy cargo loads and high-temperature hauling. This matched coil-and-plug kit restores original powertrain efficiency, ensuring reliable cold starts and sustained combustion under full gross vehicle weight ratings.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":50626038628600,"sku":"DS-EE6Z8HDU0","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-chevrolet-silverado-1999-2007-4-3l-1.jpg?v=1790354270"}],"url":"https:\/\/performancechiptuning.com\/collections\/chevrolet-silverado-ignition.oembed","provider":"Performance Chip Tuning","version":"1.0","type":"link"}