{"product_id":"high-output-alternator-for-hummer-h2-2008-2009-6-2l","title":"High Output Alternator for Hummer H2 (2008-2009) 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Amp 300A Output Alternator for 2008-2009 Hummer H2 (GMT820)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 300-amp high output alternator replaces the factory charging unit on the 2008-2009 Hummer H2 to deliver continuous high-amperage current and prevent voltage sag under heavy electrical loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Hummer H2 Charging System Limitations\u003c\/h3\u003e\n\u003cp\u003eFactory alternators on the \u003cstrong\u003eGMT820\u003c\/strong\u003e platform paired with the \u003cstrong\u003e6.2L L92\u003c\/strong\u003e V8 were designed around base electrical loads, outputting only 145 to 160 amps. When running auxiliary equipment such as high-draw recovery winches, severe-duty LED lighting arrays, overland refrigeration, or high-wattage audio systems, the stock internal bridge rectifier quickly overheats. This thermal saturation induces voltage drops down to battery resting voltage (under 12.6V) at idle, starving onboard control modules and severely shortening battery life.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eManufactured in the USA, this direct-replacement 300-amp high-output unit incorporates heavy-gauge high-temperature copper field windings and a precision-balanced rotor to maximize output across the RPM curve. An upgraded internal avalanche diode bridge rectifier dissipates heat efficiently, eliminating thermal degradation during prolonged low-RPM crawling. Built to OEM physical dimensions, it directly interfaces with factory GM accessory brackets and wiring harnesses matching part numbers \u003cstrong\u003e15093928\u003c\/strong\u003e, \u003cstrong\u003e15857608\u003c\/strong\u003e, and \u003cstrong\u003e25877026\u003c\/strong\u003e without pulley realignment or bracket machining.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x 300-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;\"\u003e2008-2009 Hummer H2\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;\"\u003e6.2L L92 Vortec V8 \/ GMT820\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;\"\u003e393 hp \/ 415 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;\"\u003e8301, 8301N, 15093928, 15857608, 15095871, 25877026, 8301-300A\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\u003e2008 Hummer H2 SUV (6.2L V8 L92)\u003c\/li\u003e\n  \u003cli\u003e2008 Hummer H2 SUT (6.2L V8 L92)\u003c\/li\u003e\n  \u003cli\u003e2009 Hummer H2 SUV (6.2L V8 L92)\u003c\/li\u003e\n  \u003cli\u003e2009 Hummer H2 SUT (6.2L V8 L92)\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 GMT820 H2?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2008-2009 Hummer H2 equipped with the \u003cstrong\u003e6.2L L92\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade my factory charging wire?\u003c\/h4\u003e\n\u003cp\u003eA heavy-gauge 1\/0 \"Big 3\" power and ground cable upgrade is strongly recommended to safely carry the full 300-amp output to the battery without resistance-induced voltage loss.\u003c\/p\u003e\n\n\u003ch3\u003eThe Hummer Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered for brutal trail conditions and high-amp auxiliary draw, this charging system delivers the rugged electrical reliability required for severe off-road recovery and heavy towing demands.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67565575241976,"sku":"DS-ESC5JGHN3","price":350.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-hummer-h2-2008-2009-6-2l-1.jpg?v=1791069099","url":"https:\/\/performancechiptuning.com\/fr\/products\/high-output-alternator-for-hummer-h2-2008-2009-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}