{"product_id":"o2-oxygen-sensor-upstream-downstream-for-gmc-yukon-2008-2014-4-8l-5-3l-6-0l-6-2l","title":"O2 Oxygen Sensor Upstream Downstream for GMC Yukon (2008-2014) 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 Replacement Oxygen Sensor Kit for 2008-2014 GMC Yukon (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece oxygen sensor kit monitors pre- and post-catalytic exhaust gas composition on the 2008-2014 GMC Yukon to optimize air-fuel ratios, restore fuel economy, and eliminate diagnostic trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Yukon Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform are subject to high thermal cycling, oil vapor blow-by, and carbon fouling over extended mileage. As the factory zirconia elements age, response times lag, forcing the ECM into rich fuel trims, reducing catalytic converter efficiency, and triggering diagnostic trouble codes such as P0135, P0141, P0420, or P0430.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-fit kit provides complete bank-to-bank coverage with dual upstream air-fuel ratio monitoring and dual downstream catalyst monitoring. Built with high-grade planar ceramic sensing elements and integrated fast-acting heater circuits, these sensors deliver rapid closed-loop operation. Double-laser welded stainless steel housings shield internal substrates from moisture intrusion and exhaust soot, while pre-treated high-temperature anti-seize threads and factory-matched terminal connectors prevent signal drop across the \u003cstrong\u003eGen IV Small Block\u003c\/strong\u003e harness.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors (Pre-Catalytic)\u003c\/li\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensors (Post-Catalytic)\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: solid font-size: min-width:\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;\"\u003e2008-2014 GMC 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;\"\u003e\n\u003cstrong\u003eVortec Gen IV V8\u003c\/strong\u003e (4.8L, 5.3L, 6.0L, 6.2L) \/ \u003cstrong\u003eGMT900\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;\"\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;\"\u003e\n\u003cstrong\u003e21546\u003c\/strong\u003e, \u003cstrong\u003e234-4254\u003c\/strong\u003e, \u003cstrong\u003e234-4407\u003c\/strong\u003e, \u003cstrong\u003e234-4668\u003c\/strong\u003e, \u003cstrong\u003e15284\u003c\/strong\u003e, \u003cstrong\u003e2344254\u003c\/strong\u003e, \u003cstrong\u003e2344668\u003c\/strong\u003e, \u003cstrong\u003eES20013\u003c\/strong\u003e, \u003cstrong\u003eOS1656\u003c\/strong\u003e, \u003cstrong\u003eOS2239\u003c\/strong\u003e, \u003cstrong\u003eOS2240\u003c\/strong\u003e, \u003cstrong\u003eOS2249\u003c\/strong\u003e, \u003cstrong\u003eSG1857\u003c\/strong\u003e\n\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\u003e2008-2014 GMC Yukon 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2014 GMC Yukon 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2014 GMC Yukon 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2014 GMC Yukon 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 Yukon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2008-2014 GMC Yukon equipped with the \u003cstrong\u003eGen IV Vortec\u003c\/strong\u003e 4.8L, 5.3L, 6.0L, and 6.2L V8 engines.\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire splicing during installation?\u003c\/h4\u003e\n\u003cp\u003eNo, these are direct-fit sensors featuring plug-and-play factory pinouts and correct harness lengths for OEM mounting locations.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Standard\u003c\/h3\u003e\n\u003cp\u003eMaintain consistent fuel mapping and preserve towing performance under heavy load by restoring precise closed-loop fueling management to your full-size truck powertrain.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551238521080,"sku":"DS-EOXHS88WE","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-oxygen-sensor-upstream-downstream-for-gmc-yukon-2008-2014-4-8l-5-3l-6-0l-6-2l-1.jpg?v=1790793821","url":"https:\/\/performancechiptuning.com\/products\/o2-oxygen-sensor-upstream-downstream-for-gmc-yukon-2008-2014-4-8l-5-3l-6-0l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}