{"product_id":"high-output-alternator-for-chevrolet-colorado-2004-2006-2-8l-3-5l","title":"High Output Alternator for Chevrolet Colorado (2004-2006) 2.8L 3.5L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Amp 250A Heavy-Duty Alternator for 2004-2006 Chevrolet Colorado (GMT355)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 250 Amp High Output Alternator upgrades the factory charging system on the 2004-2006 Chevrolet Colorado to eliminate voltage drops, stabilize rail amperage under heavy accessory loads, and protect onboard electronics.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Colorado Electrical Bottleneck\u003c\/h3\u003e\n\u003cp\u003eThe factory charging system on the first-generation \u003cstrong\u003eGMT355\u003c\/strong\u003e platform delivers a modest 100 to 125 amps from the OEM unit. When running high-draw accessories—such as auxiliary lighting, recovery winches, snow plows, or high-RMS aftermarket audio systems—the stock unit suffers severe voltage sag, dropping system voltage below 12.6V at idle. This persistent electrical starvation causes extreme thermal buildup across the stock diode bridge and internal voltage regulator, eventually resulting in diode burnout, battery sulfation, and premature alternator stator failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered and assembled in the USA, this heavy-duty 250 Amp replacement delivers robust current across the entire RPM range, maintaining stable 14.4V charging output even under heavy load at idle. Built with premium copper hairpin windings, precision-balanced rotors, and high-efficiency rectifiers paired with oversized heat sinks, it withstands engine-bay heat soak that destroys lesser units. It mounts directly into the factory accessory bracket on the \u003cstrong\u003eAtlas\u003c\/strong\u003e inline engine lineup, accepting the stock serpentine belt and OEM harness pigtail with no custom fabrication required.\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;\"\u003e2004-2006 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;\"\u003e2.8L \u003cstrong\u003eLK4\u003c\/strong\u003e, 3.5L \u003cstrong\u003eL52\u003c\/strong\u003e \/ \u003cstrong\u003eGMT355\u003c\/strong\u003e\n\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;\"\u003e175-220 hp \/ 185-225 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;\"\u003e\n\u003cstrong\u003e15884348\u003c\/strong\u003e, \u003cstrong\u003e15946765\u003c\/strong\u003e, \u003cstrong\u003e25925948\u003c\/strong\u003e, \u003cstrong\u003e8158843480\u003c\/strong\u003e, \u003cstrong\u003e8159467650\u003c\/strong\u003e, \u003cstrong\u003e2650682A\u003c\/strong\u003e, \u003cstrong\u003e2650682C\u003c\/strong\u003e, \u003cstrong\u003e420682\u003c\/strong\u003e, \u003cstrong\u003eTG12S047\u003c\/strong\u003e, \u003cstrong\u003eTG12S089\u003c\/strong\u003e, \u003cstrong\u003e11047\u003c\/strong\u003e\n\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\u003e2004-2006 Chevrolet Colorado 2.8L L4 (LK4)\u003c\/li\u003e\n  \u003cli\u003e2004-2006 Chevrolet Colorado 3.5L L5 (L52)\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-in fitment for the 2004-2006 Chevrolet Colorado equipped with either the 2.8L \u003cstrong\u003eLK4\u003c\/strong\u003e inline-4 or 3.5L \u003cstrong\u003eL52\u003c\/strong\u003e inline-5 engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade my battery cables when installing a 250A unit?\u003c\/h4\u003e\n\u003cp\u003eA \"Big 3\" wiring upgrade utilizing 0-gauge or 4-gauge OFC cables from the alternator output stud to the battery positive and chassis ground is strongly recommended to handle 250 amps safely.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Colorado Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eMid-size work and overland rigs require non-stop electrical reliability under harsh payload, trail recovery, and towing demands. This 250A unit provides continuous, stable current so your \u003cstrong\u003eGMT355\u003c\/strong\u003e truck operates fully powered on the job site or backcountry without charging dropouts.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67566288535800,"sku":"DS-EKMLTUV48","price":371.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-chevrolet-colorado-2004-2006-2-8l-3-5l-1.jpg?v=1791085864","url":"https:\/\/performancechiptuning.com\/products\/high-output-alternator-for-chevrolet-colorado-2004-2006-2-8l-3-5l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}