{"product_id":"high-output-alternator-for-hummer-h3-2007-2010-3-7l","title":"High Output Alternator for Hummer H3 (2007-2010) 3.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Amp 250A Heavy-Duty Alternator for 2007-2010 Hummer H3 (GMT345)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 250-amp alternator replaces the low-output factory charging unit on the 2007-2010 Hummer H3 to eliminate idle voltage drop and sustain power for high-draw auxiliary off-road equipment.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Hummer H3 Electrical Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory 125-amp charging unit on the \u003cstrong\u003eGMT345\u003c\/strong\u003e chassis was engineered strictly for baseline cabin electronics, leaving zero reserve capacity for modern overland or utility setups. When running winches, auxiliary LED lighting, dual batteries, or onboard air systems, the stock alternator drops below 12.6 volts at idle. This persistent electrical starvation overheats factory stator windings, shortens lead-acid and AGM battery lifespan, and triggers voltage-threshold trouble codes in the powertrain control module.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eManufactured in the USA, this high-output direct replacement unit increases output to 250 amps, delivering reliable 14.4V regulation and over 150 amps at curb idle. Built with heavy-gauge pure copper windings, a high-efficiency rotor-stator pack, and an integrated heavy-duty avalanche diode rectifier bridge, this unit resists internal thermal breakdown under maximum load. Housed in a precision-cast aluminum case designed to OEM mounting specifications, it dissipates heat rapidly while maintaining structural integrity during extreme engine bay temperatures and severe off-road vibration.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x 250-Amp High-Output Alternator\u003c\/li\u003e\n\u003c\/ul\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;\"\u003e2007-2010 Hummer H3\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;\"\u003e3.7L Atlas LLR \/ GMT345\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;\"\u003e242 hp \/ 242 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;\"\u003e8159467650, 11148, 15884348, 15946765, 25925948, 8158843480, 420682, TG12S047, TG12S089, 2650682A, 2650682C, 11148N\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\u003e2007-2010 Hummer H3 Base \/ Adventure \/ Luxury (3.7L LLR I5)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFrequently Asked Questions \u0026amp; Fitment Warnings\u003c\/h3\u003e\n\u003ch4\u003eDoes this fit the GMT345 H3?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2007-2010 Hummer H3 equipped with the 3.7L \u003cstrong\u003eAtlas LLR\u003c\/strong\u003e engine. \u003cstrong\u003eThis unit does not fit 2006 3.5L L52 engines or 2008-2010 5.3L LH8\/LH9 V8 models.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade my charging cables with this 250A alternator?\u003c\/h4\u003e\n\u003cp\u003eYes, executing a \"Big 3\" wiring upgrade with minimum 1\/0 AWG pure copper cable is required to safely transfer 250 amps without burning the stock fused link.\u003c\/p\u003e\n\n\u003ch3\u003eThe Hummer Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for full-throttle trail use, rock crawling, and heavy recovery winching, this alternator provides uninterrupted electrical stability without thermal drop-off.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67565888798968,"sku":"DS-EQE8X7AE5","price":337.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-hummer-h3-2007-2010-3-7l-1.jpg?v=1791077510","url":"https:\/\/performancechiptuning.com\/es\/products\/high-output-alternator-for-hummer-h3-2007-2010-3-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}