{"product_id":"o2-oxygen-sensor-downstream-for-gmc-sierra-1500-yukon-2008-2013-4-8l-5-3l-6-0l-6-2l","title":"O2 Oxygen Sensor Downstream for GMC Sierra 1500, Yukon (2008-2013) 4.8L, 5.3L, 6.0L, 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Downstream Oxygen Sensor Set for 2008-2013 GMC Sierra 1500, Yukon (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The Downstream Oxygen Sensor Set monitors catalytic converter post-catalyst emissions efficiency on 2008-2013 GMC Sierra 1500 and Yukon models to maintain proper closed-loop emissions calibration and eliminate false diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra 1500, Yukon Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on \u003cstrong\u003eGMT900\u003c\/strong\u003e trucks operate in severe thermal environments directly downstream of the catalytic converters. Over thousands of heat cycles, soot accumulation, oil blow-by, and silica contamination coat the internal zirconia ceramic sensing element. This fouling slows sensor voltage response times and creates inaccurate switching thresholds, falsely reporting catalyst degradation and triggering persistent check engine lights such as \u003cstrong\u003eP0420\u003c\/strong\u003e, \u003cstrong\u003eP0430\u003c\/strong\u003e, or \u003cstrong\u003eP0130-P0161\u003c\/strong\u003e while disrupting long-term fuel trim feedback.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement downstream pair is engineered to factory GM specifications with high-grade, double-shielded 304 stainless steel housings that prevent thermal shock and moisture intrusion. Featuring fast-acting internal ceramic heater elements and calibrated diffusion layers, these sensors provide millivolt-accurate signal feedback to the ECM. Each unit features factory-matched wire leads, high-temp silicone fiberglass protective sleeving, and OE-style sealed connectors for plug-and-play installation without cutting, crimping, or harness splicing.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x Downstream Oxygen Sensors (Bank 1 Sensor 2 and Bank 2 Sensor 2)\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;\"\u003e2008-2013 GMC Sierra 1500, Yukon\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, 6.2L Gen IV Vortec V8 \/ GMT900\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;\"\u003e295-403 hp \/ 305-417 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;\"\u003e234-4407, 234-4256, 12609457, 12611165, 92457789\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\u003e2008-2013 GMC Sierra 1500 (4.8L, 5.3L, 6.0L, 6.2L V8)\u003c\/li\u003e\n  \u003cli\u003e2008-2013 GMC Yukon (4.8L, 5.3L, 6.0L, 6.2L V8)\u003c\/li\u003e\n  \u003cli\u003e2008-2014 Cadillac Escalade \u0026amp; Escalade ESV (6.2L 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 GMT900 Sierra 1500, Yukon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2008-2013 GMC Sierra 1500 and Yukon equipped with the \u003cstrong\u003e4.8L, 5.3L, 6.0L, and 6.2L Gen IV Vortec\u003c\/strong\u003e engines in the downstream positions (post-catalytic converter).\u003c\/p\u003e\n\n\u003ch4\u003eDo I need special tools or thread compound to install these sensors?\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a standard 7\/8-inch (22mm) slotted O2 sensor socket, and anti-seize must be applied strictly to the threads while keeping the protective sensor probe tip completely clean.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Caliber\u003c\/h3\u003e\n\u003cp\u003eBuilt for the heavy-duty workload and towing demands expected of GMC trucks, these sensors deliver precise exhaust feedback under full gross vehicle weight ratings and severe operating temps.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67911059767544,"sku":"DS-E1WPJ43KU","price":80.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-downstream-for-gmc-sierra-1500-yukon-2008-2013-4-8l-5-3l-6-0l-6-2l-1.jpg?v=1793394344","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-downstream-for-gmc-sierra-1500-yukon-2008-2013-4-8l-5-3l-6-0l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}