{"product_id":"starter-for-chevrolet-silverado-2004-2008-4-8l-5-3l","title":"Starter for Chevrolet Silverado (2004-2008) 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Torque Replacement Starter Motor for 2004-2008 Chevrolet Silverado (GMT800 \/ GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The replacement starter motor delivers high-torque cranking to reliably turn over the 4.8L and 5.3L V8 engines on 2004-2008 Chevrolet Silverado trucks under all thermal conditions.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Silverado Solenoid and Thermal Degradation Problem\u003c\/h3\u003e\n\u003cp\u003eFactory starter assemblies on \u003cstrong\u003eGMT800\u003c\/strong\u003e and \u003cstrong\u003eGMT900\u003c\/strong\u003e trucks operate directly adjacent to the passenger-side exhaust manifold. Sustained exhaust heat soak degrades the internal copper commutator segments and breaks down the solenoid pull-in coil insulation over time. This thermal stress leads to high electrical resistance, resulting in classic no-start symptoms such as single-click solenoid failure, sluggish cranking, or complete armature lockup when the engine bay reaches full operating temperature.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis replacement unit utilizes a modern Permanent Magnet Gear Reduction (\u003cstrong\u003ePMGR\u003c\/strong\u003e) architecture engineered to multiply rotational torque while significantly lowering amperage draw on the vehicle’s primary electrical bus. Featuring dense, high-purity copper field windings, a heavy-duty balanced armature, and an upgraded high-temp solenoid switch, it resists heat soak and terminal degradation. A precision case-hardened 9-tooth drive pinion ensures positive flywheel ring gear engagement without binding or tooth shearing, matching factory OEM numbers \u003cstrong\u003e12610300\u003c\/strong\u003e, \u003cstrong\u003e89018123\u003c\/strong\u003e, and \u003cstrong\u003e12604477\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Starter Motor\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;\"\u003e2004-2008 Chevrolet Silverado\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;\"\u003eVortec 4800 (LR4\/LY2), Vortec 5300 (LM7\/L59\/LH6\/LY5) \/ GMT800, GMT900\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;\"\u003e285-315 hp \/ 295-338 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;\"\u003e89018123, 12604477, 12610300, 410-12257, 6494, 336-2002\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\u003e2004-2008 Chevrolet Silverado 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2004-2008 Chevrolet Silverado 1500 5.3L 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 GMT800 and GMT900 Silverado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2004-2008 Chevrolet Silverado equipped with the \u003cstrong\u003eVortec 4.8L\u003c\/strong\u003e and \u003cstrong\u003eVortec 5.3L\u003c\/strong\u003e V8 engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need shims or wiring modifications to install this starter?\u003c\/h4\u003e\n\u003cp\u003eNo, this unit matches the factory mounting pad, 12V terminal, and 'S' terminal locations, bolting directly into place with original factory hardware and torque specifications.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to meet the relentless demands of daily hauling and severe-duty towing, this PMGR starter motor ensures your Chevrolet Silverado starts reliably regardless of climate or heavy payload conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67898398867704,"sku":"DS-E5OYXU5SX","price":107.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/starter-for-chevrolet-silverado-2004-2008-4-8l-5-3l-1.jpg?v=1793320090","url":"https:\/\/performancechiptuning.com\/de\/products\/starter-for-chevrolet-silverado-2004-2008-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}