{"product_id":"performance-timing-chain-kit-for-chevrolet-express-2500-3500-2003-2007-4-8l-6-0l","title":"Performance Timing Chain Kit for Chevrolet Express 2500,3500 (2003-2007) 4.8L 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Performance Timing Chain Kit for 2003-2007 Chevrolet Express 2500,3500 (GMT610)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Timing Chain Kit synchronizes the camshaft and crankshaft rotation on the 2003-2007 Express 2500,3500 to eliminate timing drift, chain slack, and premature valvetrain wear under heavy load.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Express 2500,3500 Valvetrain Weakness\u003c\/h3\u003e\n\u003cp\u003eFactory single-roller chains on the \u003cstrong\u003eGMT610\u003c\/strong\u003e platform suffer from progressive elongation due to relentless thermal cycling, high torsional loads, and extended service hours under severe duty cycles. As the OEM link plates stretch, camshaft timing retards dynamically, leading to ignition jitter, erratic cam sensor correlation codes (such as DTC P0341), and suboptimal combustion chamber efficiency. Furthermore, factory powdered-metal sprockets experience premature tooth galling under commercial hauling demands, which exacerbates timing slop and compromises critical valvetrain stability at sustained high engine speeds.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement timing set features high-tensile alloy steel links heat-treated to resist pin-joint wear and cyclic stretching under prolonged fleet operation. Paired with precision-machined, induction-hardened crank and cam sprockets engineered specifically for \u003cstrong\u003e24X\u003c\/strong\u003e reluctor LS-series architectures, this kit is designed to ensure exact tooth-to-roller engagement. By maintaining micrometer-level gear mesh and strict pitch tolerances, it mitigates harmonic valvetrain oscillations, optimizes dynamic valve timing events, and delivers rock-solid durability for high-mileage, heavy-towing commercial applications.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 Timing Chain\u003c\/li\u003e\n  \u003cli\u003e1 Camshaft Sprocket\u003c\/li\u003e\n  \u003cli\u003e1 Crankshaft Sprocket\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;\"\u003e2003-2007 Chevrolet Express 2500,3500\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;\"\u003e\n\u003cstrong\u003eVortec 4800 (LR4) \/ Vortec 6000 (LQ4)\u003c\/strong\u003e \/ \u003cstrong\u003eGMT610\u003c\/strong\u003e\n\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;\"\u003e285-300 hp \/ 295-360 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;\"\u003e\u003cstrong\u003eTS4194A\u003c\/strong\u003e\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\u003e2003-2007 Chevrolet Express 2500 4.8L V8 (24X Reluctor)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Express 2500 6.0L V8 (24X Reluctor)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Express 3500 4.8L V8 (24X Reluctor)\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Express 3500 6.0L V8 (24X Reluctor)\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 GMT610 Express 2500,3500?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2007 Chevrolet Express 2500,3500 equipped with the \u003cstrong\u003eGen III LS-series 4.8L LR4 or 6.0L LQ4\u003c\/strong\u003e engine with a 24X reluctor wheel. \u003cstrong\u003eDoes not fit later Gen IV 58X reluctor configurations or 1X cam sensor gear setups.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to verify tooth counts before mounting the sprockets?\u003c\/h4\u003e\n\u003cp\u003eYes, match the sprocket tooth counts and chain link count against your existing assembly before final torquing to confirm proper 24X crank profile alignment.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Commercial Fleet Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe commercial fleet payload cycles and high-tonnage towing, this timing kit provides the bulletproof mechanical stability your heavy-duty Express van requires on the job.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545325306104,"sku":"DS-EWR438TQH","price":81.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-timing-chain-kit-for-chevrolet-express-2500-3500-2003-2007-4-8l-6-0l-1.jpg?v=1790721735","url":"https:\/\/performancechiptuning.com\/products\/performance-timing-chain-kit-for-chevrolet-express-2500-3500-2003-2007-4-8l-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}