{"product_id":"o2-oxygen-sensor-upstream-downstream-for-gmc-sierra-1500-yukon-2006-2007-4-8l","title":"O2 Oxygen Sensor Upstream Downstream for GMC Sierra 1500 Yukon (2006-2007) 4.8L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Oxygen Sensor Kit for 2006-2007 GMC Sierra and Yukon (GMT800 \/ GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece oxygen sensor kit replaces degraded factory upstream and downstream O2 sensors on the 2006-2007 Sierra and Yukon to restore precise air-fuel ratio monitoring, resolve check engine lights, and improve fuel efficiency.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock GMC Sierra,Yukon Sensor Degradation Problem\u003c\/h3\u003e\n\u003cp\u003eFactory zirconia O2 sensors on high-mileage \u003cstrong\u003eGMT800\u003c\/strong\u003e and \u003cstrong\u003eGMT900\u003c\/strong\u003e trucks succumb to severe thermal cycling, silica contamination, and carbon soot accumulation. As internal platinum electrodes foul, response latency spikes. The ECM receives lazy voltage swings, forcing open-loop fueling failsafes or over-fueling rich trims that load the catalytic converters, drop fuel economy, and throw diagnostic trouble codes such as P0135, P0141, or P0420.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive set provides matched upstream sensing and downstream catalyst-monitoring sensors engineered for rigorous exhaust environments. Featuring double-laser-welded stainless steel bodies, fast-activating ceramic planar heater elements, and high-temp cross-linked wire insulation, these sensors withstand sustained exhaust gas temperatures over 1,400°F. Precision-calibrated switching speeds guarantee rapid closed-loop ECM feedback, stabilizing fuel trim parameters on the \u003cstrong\u003eVortec 4800 (LR4 \/ LY2)\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 x Upstream Oxygen Sensors\u003c\/li\u003e\n  \u003cli\u003e2 x 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;\"\u003e2006-2007 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;\"\u003eVortec 4800 (LR4 \/ LY2) \/ GMT800, 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;\"\u003e285-295 hp \/ 295-305 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;\"\u003eJ578459, 234-4018, 19178928, 19355308, 234-4066, 234-4112, 234-4337, 2344066, 25312197, ES20002, ES20051, SG274, SG277, 12589321, 19178958, 19209815, 19355306, 213-3533, 213-3538, AA12578459, 19209814, 213-1553, 2131553, 234-4025, 234-4087, 234-4646, 234-4819, 2344025, 2344087, 2344646, 2344819, 250-24087, 250-24340, 25024087, 25024340\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\u003e2006 GMC Sierra 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2007 GMC Sierra 1500 \/ Classic 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2006 GMC Yukon 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2007 GMC Yukon 4.8L 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 \/ GMT900 Sierra,Yukon?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2006-2007 GMC Sierra 1500 and Yukon equipped with the \u003cstrong\u003e4.8L V8 (LR4 \/ LY2)\u003c\/strong\u003e engine. \u003cstrong\u003eConfirm your vehicle has the 4.8L V8 before ordering; models equipped with 4.3L V6, 5.3L, or 6.0L V8 configurations require distinct harness lengths.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo I need to calibrate or tune the ECM after installation?\u003c\/h4\u003e\n\u003cp\u003eNo tuning is required, but clearing existing DTCs and performing an ECM fuel trim reset with a scan tool accelerates closed-loop relearn cycles.\u003c\/p\u003e\n\n\u003ch3\u003eThe GMC Heavy-Duty Reliability Standard\u003c\/h3\u003e\n\u003cp\u003eFull-size GM work trucks demand rugged reliability under continuous payload and towing stresses; matched four-sensor replacement ensures stable fuel delivery, cooler catalytic operation, and uncompromised pulling power.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551485165816,"sku":"DS-E3DO9QPYK","price":89.95,"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-sierra-1500-yukon-2006-2007-4-8l-1.jpg?v=1790797087","url":"https:\/\/performancechiptuning.com\/es\/products\/o2-oxygen-sensor-upstream-downstream-for-gmc-sierra-1500-yukon-2006-2007-4-8l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}