{"product_id":"starter-for-gmc-sierra-2019-2020-5-3l-6-2l","title":"Starter for GMC Sierra (2019-2020) 5.3L 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eOEM-Replacement Starter Motor for 2019-2020 GMC Sierra (T1XX)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The replacement starter motor delivers high-torque cranking to the 2019-2020 Sierra flywheel to restore rapid, dependable engine turnover under all operating temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra Starter Failure Modes\u003c\/h3\u003e\n\u003cp\u003eOn modern \u003cstrong\u003eT1XX\u003c\/strong\u003e platform trucks, factory starters face severe thermal cycling and sustained electrical loads due to tight engine bay packaging and auto start-stop operations. Over time, radiant heat from the exhaust manifolds degrades the internal solenoid contacts, resulting in high internal resistance, voltage drops, and classic single-click or no-crank conditions. Furthermore, mechanical wear on the copper commutator brushes and internal planetary gears causes sluggish rotation, excessive amp draw, and eventual failure of the internal overrunning clutch to properly engage the flexplate ring gear.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to exact GM OE specifications under part numbers \u003cstrong\u003e12689541\u003c\/strong\u003e and \u003cstrong\u003e438000-3881\u003c\/strong\u003e, this unit incorporates a permanent magnet gear reduction (PMGR) architecture. The PMGR configuration generates maximum stall torque while drawing significantly lower amperage from the 12V electrical system. Heavy-duty pure copper windings, high-temp insulated armature wire, and a hardened 15-tooth pinion gear resist premature stripping and heat-induced short circuits. The precision-cast mounting flange matches factory bellhousing locations perfectly, ensuring seamless gear mesh without shimming.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Genuine GM 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;\"\u003e2019-2020 GMC Sierra 1500\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;\"\u003eEcoTec3 V8 (L84, L87) \/ T1XX\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;\"\u003e355-420 hp \/ 383-460 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;\"\u003e12689541, 438000-3881\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\u003e2019 GMC Sierra 1500 5.3L V8 (L84)\u003c\/li\u003e\n  \u003cli\u003e2019 GMC Sierra 1500 6.2L V8 (L87)\u003c\/li\u003e\n  \u003cli\u003e2020 GMC Sierra 1500 5.3L V8 (L84)\u003c\/li\u003e\n  \u003cli\u003e2020 GMC Sierra 1500 6.2L V8 (L87)\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 T1XX Sierra?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2019-2020 GMC Sierra equipped with the \u003cstrong\u003eL84\u003c\/strong\u003e (5.3L) or \u003cstrong\u003eL87\u003c\/strong\u003e (6.2L) engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to shim the starter during installation?\u003c\/h4\u003e\n\u003cp\u003eNo, this starter features a direct-fit factory bellhousing pattern that requires no shimming or modification.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe fleet duty and heavy towing demands, this starter provides instant, reliable turnover across severe temperature swings and heavy duty cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67898415939832,"sku":"DS-EZFBD42YZ","price":114.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/starter-for-gmc-sierra-2019-2020-5-3l-6-2l-1.jpg?v=1793320557","url":"https:\/\/performancechiptuning.com\/fr\/products\/starter-for-gmc-sierra-2019-2020-5-3l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}