{"product_id":"starter-for-gmc-sierra-2004-2008-4-8l-5-3l","title":"Starter for GMC Sierra (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 GMC Sierra (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 the flywheel on the 2004-2008 GMC Sierra to ensure immediate, reliable engine turnover under all operating temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Starter Failure Points\u003c\/h3\u003e\n\u003cp\u003eFactory starters on the \u003cstrong\u003eGMT800\u003c\/strong\u003e and \u003cstrong\u003eGMT900\u003c\/strong\u003e platforms frequently succumb to internal thermal degradation and high-resistance electrical failure. Positioned low on the engine block adjacent to the exhaust manifold, factory starter solenoids experience extreme heat soak over repeated duty cycles. This constant exposure cooks the internal copper contact disc and plunger assembly, leading to high electrical resistance, pitting, and the classic single-click no-crank symptom. Furthermore, thermal breakdown of the armature brush assembly and factory drive clutch causes degraded cranking speed, intermittent starting, and eventual pinion gear wear against the flexplate ring gear.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct bolt-in unit, this starter utilizes an efficient \u003cstrong\u003ePermanent Magnet Gear Reduction (PMGR)\u003c\/strong\u003e configuration. The planetary gear reduction design multiplies torque output while significantly decreasing amperage draw from the electrical system during cold cranking. Built with heavy-duty copper field windings, a ruggedized solenoid with high-temperature contact points, and a case-hardened 9-tooth drive gear, it prevents thermal bind and premature wear. Direct OE-spec mounting flanges and terminal connections allow a seamless bolt-on fit without harness modifications, directly replacing worn OEM units numbered \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 GMC Sierra\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 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2004-2008 GMC Sierra 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 Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2004-2008 GMC Sierra 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\u003eWhat should be verified before installing this replacement starter?\u003c\/h4\u003e\n\u003cp\u003eAlways verify the battery state-of-charge is at least 12.6 volts and that the main battery cables and engine ground straps are clean, tight, and free of corrosion.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle heavy towing duties, severe fleet cycling, and extreme temperature ranges, this PMGR starter ensures that your Vortec V8 turns over reliably every time you turn the key.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67898400276728,"sku":"DS-EHPP4V7DU","price":107.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/starter-for-gmc-sierra-2004-2008-4-8l-5-3l-1.jpg?v=1793320137","url":"https:\/\/performancechiptuning.com\/es\/products\/starter-for-gmc-sierra-2004-2008-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}