{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-1500-2008-2013-4-8l-5-3l-6-0l-6-2l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Silverado 1500 (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 Oxygen Sensor Kit for 2008-2013 Chevrolet Silverado (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece oxygen sensor kit replaces degraded upstream and downstream sensors on the 2008-2013 Silverado to restore closed-loop fuel metering, stabilize idle, and eliminate emissions-related trouble codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Silverado Exhaust Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on \u003cstrong\u003eGMT900\u003c\/strong\u003e platform trucks undergo severe thermal cycling and exposure to soot, oil blow-by, and exhaust contaminants over high mileage. As the stock zirconium dioxide element ages, its switching frequency between lean and rich states drops significantly. This delayed response forces the powertrain control module into inaccurate fuel trim calculations, resulting in unburned fuel waste, loss of low-end torque, fouled spark plugs, and recurring diagnostic trouble codes such as P0135, P0155, or false catalytic efficiency faults (P0420\/P0430).\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis 4-piece replacement package restores factory-spec AFR feedback across Bank 1 and Bank 2. Each direct-fit sensor features a high-grade ceramic thimble housed within a dual-layer 304 stainless steel shield to prevent soot contamination and thermal shock. Engineered with rapid-heating internal elements, they reach target operating temperatures in seconds to minimize cold-start emissions. High-temp PTFE wiring harnesses and pre-pinned OEM-style connectors ensure plug-and-play installation without wire splicing or signal resistance deviations.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2x Upstream Oxygen Sensors (Pre-Catalytic Converter)\u003c\/li\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensors (Post-Catalytic Converter)\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;\"\u003e2008-2013 Chevrolet Silverado 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 (4.8L, 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;\"\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;\"\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\u003e2008-2013 Chevrolet Silverado 1500 4.8L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2013 Chevrolet Silverado 1500 5.3L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2013 Chevrolet Silverado 1500 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2008-2013 Chevrolet Silverado 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 Silverado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2008-2013 Chevrolet Silverado 1500 equipped with the \u003cstrong\u003eGen IV Vortec\u003c\/strong\u003e 4.8L, 5.3L, 6.0L, and 6.2L engines. \u003cstrong\u003eConfirm your truck is equipped with one of these V8 displacements prior to installation.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eIs harness splicing or an aftermarket ECU calibration required?\u003c\/h4\u003e\n\u003cp\u003eNo, these direct-fit sensors utilize OE-matched connectors that plug directly into the factory wiring harness with no calibration or tune needed.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Truck Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to withstand severe exhaust heat and sustained high-load hauling, this complete O2 sensor set delivers reliable, OE-spec air-fuel management across all cylinders under demanding towing conditions.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551208538360,"sku":"DS-EYXNW027I","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-chevrolet-silverado-1500-2008-2013-4-8l-5-3l-6-0l-6-2l-1.jpg?v=1790793509","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-1500-2008-2013-4-8l-5-3l-6-0l-6-2l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}