{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-suburban-2500-2003-2006-6-0l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Suburban 2500 (2003-2006) 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit O2 Oxygen Sensor Set for 2003-2006 Chevrolet Suburban (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The O2 Oxygen Sensor Upstream Downstream Kit replaces aged, fouled exhaust gas sensors on the 2003-2006 Suburban to restore factory air-fuel ratio closed-loop cycling and clear emissions trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Suburban Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory zirconia O2 sensors on the high-mileage \u003cstrong\u003eGMT800\u003c\/strong\u003e platform suffer from severe thermal cycling, silica contamination, and carbon soot buildup. Over extended operation, internal platinum electrodes degrade, resulting in sluggish response times or fixed open-loop operating bias. In the \u003cstrong\u003eVortec 6000 LQ4\u003c\/strong\u003e, a deteriorated upstream sensor skews fuel trim tables lean or rich, causing unburned fuel washdown, degraded fuel economy, rough idle, and premature catalytic converter degradation. Downstream failures trigger stubborn P0420\/P0430 DTCs even when catalyst conversion efficiency remains viable.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-piece sensor replacement kit supplies direct-fit upstream and downstream monitoring to restore exact closed-loop ECM communication. Built with high-temperature dual-layer fluoropolymer insulated wiring, corrosion-resistant 304 stainless steel housings, and porous ceramic thimbles, these sensors provide rapid heater warm-up and fast switching frequency. Precision factory-matched terminal connectors eliminate splicing, while laser-welded outer seals guard against exhaust moisture and road grime intrusion under heavy hauling conditions.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors\u003c\/li\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensors\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;\"\u003e2003-2006 Chevrolet Suburban 2500\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;\"\u003e6.0L Vortec 6000 (LQ4) \/ 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;\"\u003e325 hp \/ 365 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;\"\u003e213-4229, 234-4254, 234-4407, 234-4669, 2344254, SG1066, 213-1161, 2131161, 2134229, 234-4103, 234-4256, 234-4651, 2344103, 2344256, 2344651, 2344407, 2344669, 15282, 18144, 12572705\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 Chevrolet Suburban 2500 6.0L 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 Suburban?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2006 Chevrolet Suburban 2500 equipped with the \u003cstrong\u003e6.0L Vortec LQ4\u003c\/strong\u003e engine; confirm your displacement prior to ordering as harness lengths differ on 5.3L and 8.1L engines.\u003c\/p\u003e\n\n\u003ch4\u003eShould anti-seize compound be applied during sensor installation?\u003c\/h4\u003e\n\u003cp\u003eApply a light coat of high-temperature copper anti-seize exclusively to the male thread pitch, taking extreme care not to contaminate the exposed sensor thimble or slotted sensing tip.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt for the severe-duty demands of 3\/4-ton heavy hauling and continuous towing, these sensors maintain accurate Lambda calibration under high EGT cycles to keep your Suburban running clean and powerful on any job site.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551315165432,"sku":"DS-EIDEJELO4","price":76.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-suburban-2500-2003-2006-6-0l-1.jpg?v=1790794881","url":"https:\/\/performancechiptuning.com\/es\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-suburban-2500-2003-2006-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}