{"product_id":"o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-2500-hd-3500-hd-2003-2007-6-0l","title":"O2 Oxygen Sensor Upstream Downstream for Chevrolet Silverado 2500 HD 3500 HD (2003-2007) 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Complete Oxygen Sensor Kit for 2003-2007 Chevrolet Silverado (GMT800)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The O2 sensor kit monitors exhaust gas oxygen content pre- and post-catalytic converter on the 2003-2007 Silverado to maintain closed-loop fuel metering and emissions compliance.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Chevrolet Silverado Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory oxygen sensors on the \u003cstrong\u003eGMT800\u003c\/strong\u003e platform endure severe thermal cycles, oil vapor exposure, and carbon soot accumulation under heavy hauling. Over time, internal zirconia ceramic elements degrade and response rates drop. This sensor lag skews air-fuel trims, triggering rich or lean conditions, spark plug fouling, diminished fuel economy, and persistent diagnostic trouble codes such as P0131, P0151, or catalytic inefficiency codes.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis comprehensive four-sensor kit restores closed-loop engine management accuracy for the \u003cstrong\u003eVortec 6000 LQ4\u003c\/strong\u003e. Featuring high-grade planar zirconia sensing elements with fast-acting integrated internal heaters, these sensors reach operational temperature rapidly to minimize cold-start emissions and lock in stoichiometric 14.7:1 air-fuel ratios. Double-walled stainless steel housings resist corrosion and mechanical shock, while pre-pinned factory-style weatherpack connectors ensure a leak-proof, 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 Sensor\u003c\/li\u003e\n  \u003cli\u003e2x Downstream Oxygen Sensor\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;\"\u003e2003-2007 Chevrolet Silverado\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 6000 LQ4\u003c\/strong\u003e \/ \u003cstrong\u003eGMT800\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;\"\u003e300 hp \/ 360 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\u003e213-4229\u003c\/strong\u003e, \u003cstrong\u003e234-4254\u003c\/strong\u003e, \u003cstrong\u003e234-4407\u003c\/strong\u003e, \u003cstrong\u003e234-4669\u003c\/strong\u003e, \u003cstrong\u003e2344254\u003c\/strong\u003e, \u003cstrong\u003eSG1066\u003c\/strong\u003e, \u003cstrong\u003e213-1161\u003c\/strong\u003e, \u003cstrong\u003e2131161\u003c\/strong\u003e, \u003cstrong\u003e2134229\u003c\/strong\u003e, \u003cstrong\u003e234-4103\u003c\/strong\u003e, \u003cstrong\u003e234-4256\u003c\/strong\u003e, \u003cstrong\u003e234-4651\u003c\/strong\u003e, \u003cstrong\u003e2344103\u003c\/strong\u003e, \u003cstrong\u003e2344256\u003c\/strong\u003e, \u003cstrong\u003e2344651\u003c\/strong\u003e, \u003cstrong\u003e2344407\u003c\/strong\u003e, \u003cstrong\u003e2344669\u003c\/strong\u003e, \u003cstrong\u003e15282\u003c\/strong\u003e, \u003cstrong\u003e18144\u003c\/strong\u003e, \u003cstrong\u003e12572705\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\u003e2003-2007 Chevrolet Silverado 2500 HD 6.0L\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Chevrolet Silverado 3500 HD 6.0L\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 Silverado?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2007 Chevrolet Silverado equipped with the \u003cstrong\u003eVortec 6000 LQ4\u003c\/strong\u003e 6.0L engine. \u003cstrong\u003eConfirm engine displacement before ordering; this set does not fit 6.6L Duramax diesel or 8.1L big block configurations.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch4\u003eShould all four oxygen sensors be replaced simultaneously?\u003c\/h4\u003e\n\u003cp\u003eYes, replacing upstream and downstream units together ensures balanced internal sensor resistance and precise voltage feedback across both exhaust banks.\u003c\/p\u003e\n\n\u003ch3\u003eThe Chevrolet Heavy-Duty Caliber\u003c\/h3\u003e\n\u003cp\u003eEngineered to handle sustained high-load towing and high exhaust gas temperatures, this oxygen sensor set stabilizes engine fuel maps, protects expensive catalytic converters, and ensures reliable heavy-duty pulling performance.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67551314018552,"sku":"DS-ENKQBK0IV","price":76.95,"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-2500-hd-3500-hd-2003-2007-6-0l-2.jpg?v=1790794854","url":"https:\/\/performancechiptuning.com\/fr\/products\/o2-oxygen-sensor-upstream-downstream-for-chevrolet-silverado-2500-hd-3500-hd-2003-2007-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}