{"product_id":"high-output-alternator-for-hummer-h2-2003-2007-6-0l","title":"High Output Alternator for Hummer H2 (2003-2007) 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty 250-Amp High-Output Alternator for 2003-2007 Hummer H2 (GMT820)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 250-Amp High-Output Alternator replaces the factory charging unit on the 2003-2007 Hummer H2 to provide stable, elevated amperage output and prevent severe voltage drops under high-demand electrical loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Hummer H2 Electrical Shortcoming\u003c\/h3\u003e\n\u003cp\u003eFactory Delco 145-amp and 160-amp units on the \u003cstrong\u003eGMT820\u003c\/strong\u003e platform are severely taxed when supporting aftermarket winches, auxiliary LED light bars, dual-battery systems, or high-draw audio setups. Under sustained electrical pull, the OEM internal rectifier and thin stator windings experience severe thermal saturation, causing idle voltage drops below 12.6V, dimming lights, and eventual diode bridge breakdown from excessive heat soak.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered for sustained heavy-duty current delivery, this direct-fit alternator incorporates heavy-gauge pure copper stator windings and an oversized internal heat sink with heavy-duty avalanche diodes. Housed inside a precision-cast, vented aluminum case that mounts directly to the accessory bracket of the \u003cstrong\u003e6.0L LQ4 Vortec\u003c\/strong\u003e engine, it produces dependable idle amperage and up to 250 amps at cruising RPM, stabilizing system voltage and preventing regulator burnout under extreme auxiliary draw.\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;\"\u003e2003-2007 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;\"\u003e6.0L LQ4 Vortec \/ 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;\"\u003e316-325 hp \/ 360-365 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;\"\u003e10464405, 10464443, 10464453, 10464456, 10464476, 15263859, 19151921, 19244751, 8104644760, 8152260, 8292-250A\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\u003e2003-2007 Hummer H2 Base Sport Utility 4-Door 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2005-2007 Hummer H2 SUT Crew Cab Pickup 4-Door 6.0L V8\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 bolt-on fit for the 2003-2007 Hummer H2 equipped with the \u003cstrong\u003e6.0L LQ4\u003c\/strong\u003e engine. \u003cstrong\u003eThis unit does not fit 2008-2009 Hummer H2 models equipped with the 6.2L L92 engine.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade the primary charging cable?\u003c\/h4\u003e\n\u003cp\u003eA \"Big 3\" wiring upgrade utilizing heavy-gauge 1\/0 or 4 AWG power and ground cables is strongly recommended to safely transmit the full 250-amp capacity without line resistance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Hummer Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eDesigned to handle the brutal electrical demands of high-tonnage recovery winches and remote expedition gear, this high-output unit ensures continuous, regulated voltage delivery to preserve your truck's ignition and sensitive control modules across harsh terrain.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67565643071736,"sku":"DS-ECYYE6JND","price":249.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-hummer-h2-2003-2007-6-0l-1.jpg?v=1791070898","url":"https:\/\/performancechiptuning.com\/de\/products\/high-output-alternator-for-hummer-h2-2003-2007-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}