{"product_id":"performance-timing-chain-kit-for-gmc-sierra-1500-2003-2007-4-8l-5-3l-6-0l","title":"Performance Timing Chain Kit for GMC Sierra 1500 (2003-2007) 4.8L 5.3L 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHigh-Strength Performance Timing Chain Kit for 2003-2007 GMC Sierra 1500 (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Timing Chain Kit replaces the stretched or fatigued factory timing assembly on the 2003-2007 Sierra 1500 to synchronize camshaft-to-crankshaft rotation, eliminate valve timing drift, and prevent catastrophic valvetrain contact.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra 1500 Timing Drive Fatigue\u003c\/h3\u003e\n\u003cp\u003eFactory single-roller chains on high-mileage \u003cstrong\u003eGMT800\u003c\/strong\u003e trucks running \u003cstrong\u003eGen III Small Block\u003c\/strong\u003e engines (including \u003cstrong\u003eLR4\u003c\/strong\u003e, \u003cstrong\u003eLM7\u003c\/strong\u003e, and \u003cstrong\u003eLQ9\u003c\/strong\u003e variants) are notorious for mechanical stretch over sustained thermal cycles. Extended operation, aggressive towing loads, and standard valvetrain harmonics induce link elongation and tooth wear on the powdered metal gears. This chain slack degrades cam timing accuracy, introduces spark knock via fluctuating reluctor signals, and can lead to jumped teeth or piston-to-valve interference under high RPM operation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eEngineered to exceed OEM tensile load limits, this direct-fit timing assembly utilizes a high-tensile link-belt chain paired with precision-machined sprockets to resist deflection and harmonic whipping. The induction-hardened crank sprocket and camshaft gear maintain exact tooth geometry, ensuring zero backlash across the \u003cstrong\u003e24X reluctor\u003c\/strong\u003e setup. By controlling rotational harmonics and eliminating timing slop, this set locks in valve events, stabilizes dynamic compression, and supports high-load applications without timing degradation.\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 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;\"\u003e4.8L, 5.3L, 6.0L Gen III LS \/ GMT800\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;\"\u003e285-345 hp \/ 295-380 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;\"\u003eTS4194A\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\u003e2003-2006 GMC Sierra 1500 4.8L V8 (LR4)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 1500 5.3L V8 (LM7, L59, LM4)\u003c\/li\u003e\n  \u003cli\u003e2003-2006 GMC Sierra 1500 6.0L V8 (LQ9 - Denali \/ Vortec HO)\u003c\/li\u003e\n  \u003cli\u003e2007 GMC Sierra 1500 Classic 4.8L, 5.3L, 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 GMT800 Sierra 1500?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2007 GMC Sierra 1500 equipped with the \u003cstrong\u003eGen III LS\u003c\/strong\u003e engine family (4.8L, 5.3L, 6.0L). \u003cstrong\u003eDoes not fit late-2007 \"New Body Style\" Gen IV engines equipped with a 58X reluctor wheel and single-bolt camshaft gear.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDoes this kit require reluctor wheel modifications or ECM tuning?\u003c\/h4\u003e\n\u003cp\u003eNo, this is a direct-fit replacement designed for 24X crankshaft reluctor profiles and standard 3-bolt camshaft configurations, requiring no ECM re-calibration.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle severe duty towing, aggressive hauling, and continuous high-torque output, this timing set delivers the mechanical durability required to keep your GMT800 platform dependable on the job site or highway.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67545326878968,"sku":"DS-ETZLQX2R4","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-gmc-sierra-1500-2003-2007-4-8l-5-3l-6-0l-1.jpg?v=1790721759","url":"https:\/\/performancechiptuning.com\/products\/performance-timing-chain-kit-for-gmc-sierra-1500-2003-2007-4-8l-5-3l-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}