{"product_id":"performance-drive-belt-tensioner-kit-for-gmc-sierra-1500-1999-2002-4-8l-5-3l","title":"Performance Drive Belt Tensioner Kit for GMC Sierra 1500 (1999-2002) 4.8L 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eHeavy-Duty Serpentine Drive Belt \u0026amp; Tensioner Kit for 1999-2002 GMC Sierra 1500 (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Performance Drive Belt Tensioner Kit replaces worn accessory drive components on the 1999-2002 GMC Sierra 1500 to maintain constant belt tension, eliminate slip, and prevent charging or cooling system failure.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra 1500 Tensioner \u0026amp; Pulley Decay\u003c\/h3\u003e\n\u003cp\u003eOn high-mileage \u003cstrong\u003eGMT800\u003c\/strong\u003e trucks running the \u003cstrong\u003eVortec 4.8L LR4\u003c\/strong\u003e or \u003cstrong\u003e5.3L LM7\u003c\/strong\u003e, continuous torsional vibration and severe thermal cycling degrade the factory cast tensioner spring. This loss of dynamic damping leads to arm oscillation, accessory belt whip, and localized belt glazing. Simultaneously, the factory composite idler pulley bearings suffer lubricant washout and seal embrittlement, resulting in bearing runout, parasitic drag, belt misalignment, and sudden seizure under high alternator loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive kit restores front-end accessory drive (FEAD) reliability specifically for models equipped with the 130-amp alternator option. The heavy-duty tensioner assembly features a calibrated internal steel torsional spring and reinforced damping mechanism engineered to absorb transient engine spikes and prevent premature belt jump. Paired with a precision-spun steel idler pulley containing high-temperature sealed ball bearings and an oil-resistant EPDM 6-rib serpentine belt (\u003cstrong\u003e6PK2360\u003c\/strong\u003e), this assembly resists rib cracking, thermal degradation, and slip under sustained operating temperatures.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1x Serpentine Belt (Part # 6PK2360)\u003c\/li\u003e\n  \u003cli\u003e1x Idler Pulley (Part # 38001)\u003c\/li\u003e\n  \u003cli\u003e1x Belt Tensioner Assembly (Part # 38158)\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;\"\u003e1999-2002 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;\"\u003eVortec 4800 (LR4), Vortec 5300 (LM7) \/ 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;\"\u003e255-285 hp \/ 285-325 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;\"\u003e6PK2360, 38001, 38158\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\u003e1999-2002 GMC Sierra 1500 4.8L V8 (Vortec 4800 LR4) with 130 Amp Alternator\u003c\/li\u003e\n  \u003cli\u003e1999-2002 GMC Sierra 1500 5.3L V8 (Vortec 5300 LM7) with 130 Amp Alternator\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 1999-2002 GMC Sierra 1500 equipped with the \u003cstrong\u003eLR4\u003c\/strong\u003e (4.8L) or \u003cstrong\u003eLM7\u003c\/strong\u003e (5.3L) engine. \u003cstrong\u003eDoes not fit models equipped with standard 105-amp alternators, 4.3L V6, or 6.0L V8 applications due to differing drive belt lengths.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eHow do I verify if my truck has the 130-amp alternator?\u003c\/h4\u003e\n\u003cp\u003eCheck the Service Parts Identification (RPO) placard in your glove compartment for code KG8 (130-amp) rather than K68 (105-amp).\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Workhorse Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle severe towing loads and extended underhood thermal strain, this belt drive system ensures your truck's cooling and electrical charging systems perform without compromise.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67546981171448,"sku":"DS-E4ST70YL6","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/performance-drive-belt-tensioner-kit-for-gmc-sierra-1500-1999-2002-4-8l-5-3l-1.jpg?v=1790739504","url":"https:\/\/performancechiptuning.com\/fr\/products\/performance-drive-belt-tensioner-kit-for-gmc-sierra-1500-1999-2002-4-8l-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}