{"product_id":"high-output-alternator-for-chevrolet-colorado-2007-2012-2-9l-3-7l","title":"High Output Alternator for Chevrolet Colorado (2007-2012) 2.9L 3.7L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Output 250-Amp Alternator for 2007-2012 Chevrolet Colorado (GMT355)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The High Output 250-Amp Alternator upgrades the factory charging system on the 2007-2012 Colorado to supply steady, high-amperage current for demanding electrical loads, auxiliary accessories, and upgraded audio setups without system voltage drop.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Colorado Electrical Bottleneck\u003c\/h3\u003e\n\u003cp\u003eFactory charging systems on the first-generation \u003cstrong\u003eGMT355\u003c\/strong\u003e platform were engineered strictly for stock operational loads. The original 125-amp units struggle when supplemental draw is introduced, such as winches, off-road lighting, high-draw inverters, or aftermarket audio amplifiers. Under continuous thermal stress and prolonged low-RPM idle, OEM stator windings overheat, leading to excessive diode bridge degradation, internal voltage drop, premature battery depletion, and dimming interior electronics.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eManufactured in the USA, this high-output alternator features an uprated heavy-duty hairpin rotor and stator design capable of producing a true 250 amps. Utilizing premium copper windings, high-temperature internal insulation, and a heavy-duty rectifier assembly with avalanche diodes, it efficiently sheds internal heat and handles rigorous operational duty cycles. It mounts directly into factory engine accessory brackets on the Atlas \u003cstrong\u003eLLV\u003c\/strong\u003e 2.9L and \u003cstrong\u003eLLR\u003c\/strong\u003e 3.7L engines, preserving belt alignment and OE harness integration while resolving high-draw power starvation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x 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;\"\u003e2007-2012 Chevrolet Colorado\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;\"\u003e2.9L LLV \/ 3.7L LLR Atlas Inline Engines \/ GMT355\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;\"\u003e185 hp \/ 190 lb-ft (2.9L LLV); 242 hp \/ 242 lb-ft (3.7L LLR)\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\u003e2007-2012 Chevrolet Colorado 2.9L L4 (LLV)\u003c\/li\u003e\n  \u003cli\u003e2007-2012 Chevrolet Colorado 3.7L L5 (LLR)\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 GMT355 Colorado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct bolt-on fit for the 2007-2012 Chevrolet Colorado equipped with the \u003cstrong\u003eLLV\u003c\/strong\u003e 2.9L or \u003cstrong\u003eLLR\u003c\/strong\u003e 3.7L Atlas inline engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade the primary charging wire (Big 3 Upgrade)?\u003c\/h4\u003e\n\u003cp\u003eYes, running an upgraded 0-gauge or 4-gauge fused charging lead from the alternator to the battery is strongly recommended to handle 250 amps safely without voltage drop.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Truck Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for rigorous truck duty cycles, heavy towing accessories, and trail-ready utility, this high-output alternator delivers robust charging reserve to maintain peak 12V stability across every demanding load scenario.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67565887881464,"sku":"DS-EVM9WLC76","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-chevrolet-colorado-2007-2012-2-9l-3-7l-1.jpg?v=1791077448","url":"https:\/\/performancechiptuning.com\/fr\/products\/high-output-alternator-for-chevrolet-colorado-2007-2012-2-9l-3-7l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}