{"product_id":"high-output-alternator-for-pontiac-grand-prix-2005-2008-3-8l","title":"High Output Alternator for Pontiac Grand Prix (2005-2008) 3.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Amp 250A Alternator for 2005-2008 Pontiac Grand Prix (W-Body)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The high output 250-amp alternator delivers continuous, stable charging current to the 2005-2008 Pontiac Grand Prix electrical system to eliminate voltage drop caused by high-draw auxiliary components, cooling fans, and aftermarket electronics.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Pontiac Grand Prix Charging Limitations\u003c\/h3\u003e\n\u003cp\u003eFactory charging systems on the \u003cstrong\u003eW-Body\u003c\/strong\u003e platform feature OEM units typically rated at 105 to 125 amps. Under heavy thermal cycling inside the tightly packed transverse engine bay, factory internal rectifiers and diode bridges suffer severe heat soak, degrading output at idle. When powering high-current accessories, auxiliary cooling fans, or high-draw audio setups, the standard alternator on the \u003cstrong\u003eGM 3800 Series III (L26\/L32)\u003c\/strong\u003e cannot sustain rail voltage, leading to dimming headlamps, system brownouts, and accelerated battery depletion.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered and manufactured in the USA, this heavy-duty 250-amp alternator utilizes high-temperature copper windings, low-resistance heavy-duty avalanche diodes, and an upgraded internal rotor assembly to produce high-output amperage even at low engine speeds. The precision-machined housing optimizes cooling airflow over the internal bridge rectifier to dissipate heat under sustained thermal loads. It mounts directly into factory bracket locations, serving as a direct replacement for failure-prone OEM units such as \u003cstrong\u003e10339424\u003c\/strong\u003e, \u003cstrong\u003e15208916\u003c\/strong\u003e, and \u003cstrong\u003e20757890\u003c\/strong\u003e.\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;\"\u003e2005-2008 Pontiac Grand Prix\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;\"\u003e3.8L 3800 V6 \/ W-Body\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;\"\u003e200 hp \/ 230 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;\"\u003e0 124 425 031, 0 124 425 090, 10339424, 15208916, 20757890, 11126, 11126N, 0-124-425-031, AL8810N, AL8788N, AL8810X, AL8788X, 11126R\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\u003e2005-2008 Pontiac Grand Prix 3.8L V6 (Naturally Aspirated \u0026amp; Supercharged)\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 W-Body Grand Prix?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2005-2008 Pontiac Grand Prix equipped with the \u003cstrong\u003e3.8L 3800 V6\u003c\/strong\u003e engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to upgrade my main power cables?\u003c\/h4\u003e\n\u003cp\u003eDue to the increased 250-amp capacity, performing a \"Big 3\" electrical upgrade using 0-gauge or 4-gauge copper cable is strongly recommended to handle current flow and prevent line resistance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Pontiac Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle the demands of domestic high-output powerplants, this unit provides rock-solid voltage stability under heavy load, ensuring your ignition, sensors, and powertrain accessories receive constant, uninterrupted current on street or strip.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67566347092216,"sku":"DS-ESU38R206","price":414.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/high-output-alternator-for-pontiac-grand-prix-2005-2008-3-8l-1.jpg?v=1791087053","url":"https:\/\/performancechiptuning.com\/products\/high-output-alternator-for-pontiac-grand-prix-2005-2008-3-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}