{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-suburban-1500-2008-2014-5-3l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Suburban 1500 (2008-2014) 5.3L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit 4-Piece Oxygen Sensor Kit for 2008-2014 Chevrolet Suburban (GMT900)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The 4-piece upstream and downstream oxygen sensor kit replaces contaminated factory exhaust probes on the 2008-2014 Suburban to restore proper closed-loop engine fueling and eliminate check engine warnings.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Suburban Sensor Degradation \u0026amp; Carbon Contamination\u003c\/h3\u003e\n\u003cp\u003eFactory exhaust sensors on the \u003cstrong\u003eGMT900\u003c\/strong\u003e platform endure sustained thermal loading and exhaust gas condensation. Over time, oil blow-by, carbon deposits, and silicone bypass foul the internal zirconia sensing thimble on the \u003cstrong\u003eVortec 5.3L\u003c\/strong\u003e engine. This progressive contamination leads to sluggish switching response times, inaccurate millivolt feedback to the engine control module (ECM), unmetered fuel trim bias, diminished fuel mileage, and recurring diagnostic trouble codes such as P0135, P0141, or P0420 catalytic inefficiency false-positives.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis direct-replacement 4-sensor package restores complete closed-loop feedback across Bank 1 and Bank 2. Engineered with high-temperature ceramic sensing elements and integrated rapid-activation heater circuits, each unit reaches stoichiometric operating temperature within seconds of cold-start ignition. Dual-layer laser-welded stainless steel protective shielding prevents particulate deposition and thermal shock without restricting raw exhaust gas permeation. Factory-pinned pigtails ensure low-resistance signal continuity without wire splicing, matching OEM output specifications for \u003cstrong\u003e234-4254\u003c\/strong\u003e and \u003cstrong\u003e234-4668\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e4 x Upstream and Downstream Oxygen Sensors (Direct-fit harness assemblies)\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 Chevrolet Suburban 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 5.3L V8 (LY5 \/ LMG \/ LC9) \/ 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 hp \/ 335 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 Chevrolet Suburban 1500 5.3L 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 Suburban?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2008-2014 Chevrolet Suburban equipped with the \u003cstrong\u003eVortec 5.3L\u003c\/strong\u003e engine. \u003cstrong\u003eConfirm engine displacement prior to installation; this kit is designated for 5.3L models and excludes 6.0L or 2500-series heavy-duty configurations.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eDo these sensors require wire splicing or harness modification?\u003c\/h4\u003e\n\u003cp\u003eNo, each sensor utilizes vehicle-specific keyed electrical connectors with pre-terminated terminals designed for direct plug-and-play installation.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eFull-size GM utility vehicles require reliable sensor switching under heavy payload and towing duty cycles. Installing a matched four-position oxygen sensor set stabilizes pulse-width modulation, cleans up tailpipe emissions, and preserves long-term catalytic converter health under sustained high-exhaust gas temperatures.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551220171000,"sku":"DS-EC3OL8X94","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-suburban-1500-2008-2014-5-3l-1.jpg?v=1790793615","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-suburban-1500-2008-2014-5-3l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}