{"product_id":"high-output-alternator-for-cadillac-cts-2008-2009-3-6l","title":"High Output Alternator for Cadillac CTS (2008-2009) 3.6L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Output 250-Amp Alternator for 2008-2009 Cadillac CTS (Sigma II)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The high-output 250A alternator replaces the factory 150-amp unit on the 2008-2009 Cadillac CTS to deliver sustained electrical current under heavy accessory loads and maintain stable bus voltage at idle.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Cadillac CTS Charging Limitations\u003c\/h3\u003e\n\u003cp\u003eFactory charging systems on the \u003cstrong\u003eSigma II\u003c\/strong\u003e platform CTS with the \u003cstrong\u003e3.6L High Feature V6\u003c\/strong\u003e rely on an OEM 150-amp unit that quickly experiences thermal saturation under aftermarket electrical loads. When supporting high-draw audio amplifiers, auxiliary cooling fans, or extensive lighting, the factory stator and rectifier cannot sustain peak output. This results in voltage drop below the critical 13.5V threshold, leading to dimming instrumentation, parasitic battery draw, electrical accessory cutout, and accelerated diode failure under sustained thermal stress.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 250-amp direct replacement is constructed with dense, heavy-gauge copper stator windings and a precision-balanced rotor to maximize current density while minimizing internal resistance. An integrated heavy-duty solid-state voltage regulator and high-efficiency diode pack stabilize output between 13.5V and 14.5V under full transient load. Built with premium double-sealed bearings to resist shaft deflection and heat soak, this unit utilizes the factory cast mounting geometry, pulley offset, and OEM wiring interface for a true drop-in installation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 High Output 250A 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 Cadillac CTS\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;\"\u003e3.6L V6 (LLT \/ LY7) \/ Sigma II\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;\"\u003e263-304 hp \/ 253-273 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;\"\u003e11369, 10396863, 104210-5390, 210-0641\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\u003e2008-2009 Cadillac CTS 3.6L V6 (AWD \/ RWD)\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 Sigma II CTS?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct bolt-on fit for the 2008-2009 Cadillac CTS equipped with the \u003cstrong\u003e3.6L V6\u003c\/strong\u003e (\u003cstrong\u003eLLT\u003c\/strong\u003e direct-injection and \u003cstrong\u003eLY7\u003c\/strong\u003e port-injection variants).\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade charging cables when installing this unit?\u003c\/h4\u003e\n\u003cp\u003eWhile the unit plugs into the factory wiring harness, upgrading the primary battery charge lead and chassis grounds to heavy-gauge cable is recommended to achieve maximum 250-amp flow without thermal bottlenecking.\u003c\/p\u003e\n\n\u003ch3\u003eThe Cadillac Standard\u003c\/h3\u003e\n\u003cp\u003ePrecision-built for the CTS luxury-performance chassis, this high-output charging unit eliminates electrical noise and protects sensitive onboard body control modules and digital bus networks from transient voltage spikes.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67896422334712,"sku":"DS-EV83USXZZ","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-cadillac-cts-2008-2009-3-6l-1.jpg?v=1793299886","url":"https:\/\/performancechiptuning.com\/products\/high-output-alternator-for-cadillac-cts-2008-2009-3-6l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}