{"product_id":"o2-oxygen-sensor-upstream-downstream-for-gmc-yukon-xl-1500-2008-2014-5-3l-6-0l-6-2l","title":"O2 Oxygen Sensor Upstream Downstream for GMC Yukon XL 1500 (2008-2014) 5.3L, 6.0L, 6.2L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Kit for 2008-2014 GMC Yukon XL 1500 (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 XL 1500 to optimize air-fuel ratios, restore fuel economy, and eliminate check engine lights.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Yukon Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory zirconia O2 sensors on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform endure thousands of high-temperature exhaust thermal cycles alongside carbon, sulfur, and oil vapor contamination. Over time, internal sensing elements become fouled or suffer heater circuit resistance breakdowns, leading to sluggish sensor voltage response. This delayed switching prevents the PCM from maintaining stoichiometric fuel control, triggering lean\/rich DTCs (e.g., P0135, P0171, P0420), reducing fuel efficiency, and risking catalytic converter overheating under heavy towing loads.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive 4-piece kit replaces both upstream (Bank 1\/Bank 2 Sensor 1) and downstream (Bank 1\/Bank 2 Sensor 2) units simultaneously to re-establish matched signal fidelity. Manufactured with high-grade planar zirconia ceramic elements, double laser-welded stainless steel bodies, and porous PTFE filters, these direct-fit sensors protect internal components against exhaust particulate contamination while delivering precise closed-loop feedback. Pre-greased threads with anti-seize compound and OEM-grade harness pinouts ensure reliable, plug-and-play installation without wire splicing.\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;\"\u003e2008-2014 GMC Yukon XL 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 Gen IV (5.3L, 6.0L, 6.2L) \/ 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;\"\u003e320-403 hp \/ 335-417 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;\"\u003e21546, 234-4254, 234-4407, 234-4668, 15284, 2344254, 2344668, ES20013, OS1656, OS2239, OS2240, OS2249, SG1857\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 XL 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2014 GMC Yukon XL 1500 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2014 GMC Yukon XL 1500 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 XL 1500 equipped with the \u003cstrong\u003eGen IV Vortec\u003c\/strong\u003e 5.3L, 6.0L, or 6.2L engine. Confirm your specific exhaust configuration and engine displacement prior to ordering.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need special tools to replace these sensors?\u003c\/h4\u003e\n\u003cp\u003eA standard 7\/8-inch (22mm) slotted oxygen sensor socket and penetrating lubricant are recommended to remove heat-seized factory bungs without damaging harness wires.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eFull-size GMT900 haulers demand precise closed-loop fueling control to preserve exhaust gas temps under sustained towing and heavy payloads. Refreshing your O2 sensor network preserves catalytic longevity, restores factory fuel economy, and delivers clean stoichiometric performance across all work cycles.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551239995640,"sku":"DS-EK2CRFMAS","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-xl-1500-2008-2014-5-3l-6-0l-6-2l-1.jpg?v=1790793852","url":"https:\/\/performancechiptuning.com\/es\/products\/o2-oxygen-sensor-upstream-downstream-for-gmc-yukon-xl-1500-2008-2014-5-3l-6-0l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}