{"product_id":"o2-oxygen-sensor-upstream-downstream-for-hummer-h2-2003-2006-6-0l","title":"O2 Oxygen Sensor Upstream Downstream for Hummer H2 (2003-2006) 6.0L","description":"\u003ch2 style=\"font-size: clamp(18px, 3vw, 21px); margin-bottom: 15px; line-height: 1.3;\"\u003eDirect-Fit Replacement Oxygen Sensor Set for 2003-2006 Hummer H2 (GMT820)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat it Does:\u003c\/strong\u003e The complete 4-piece oxygen sensor set restores closed-loop fuel trim accuracy and catalytic monitoring on the 2003-2006 Hummer H2 to eliminate check engine lights and recover lost fuel economy.\u003c\/p\u003e\n\n\u003ch3\u003eThe Stock Hummer H2 Sensor Degradation\u003c\/h3\u003e\n\u003cp\u003eFactory zirconia O2 sensors operating in the high-heat exhaust stream of the heavy \u003cstrong\u003eGMT820\u003c\/strong\u003e chassis suffer from thermal fatigue, silica contamination, and soot accumulation over time. As internal ceramic sensing elements age, their response rate slows significantly. In the \u003cstrong\u003eVortec 6000 LQ4\u003c\/strong\u003e, sluggish upstream feedback forces the powertrain control module (PCM) into rich or lean boundary hunting, spiking fuel consumption and triggering diagnostic trouble codes such as P0130 through P0161, or false catalytic inefficiency codes like P0420 and P0430.\u003c\/p\u003e\n\n\u003ch3\u003eThe Engineering Solution\u003c\/h3\u003e\n\u003cp\u003eThis four-sensor replacement kit features planar ceramic sensing elements housed in double-protection stainless steel casings to resist thermal shock and exhaust particulate fouling. Each sensor utilizes factory-calibrated internal heater circuits for rapid light-off and stable closed-loop transition. Fitted with OEM-specification dual-shielded pigtails, weather-pack connectors, and pre-applied high-temperature thread anti-seize, these sensors ensure plug-and-play installation without wire splicing or pin relocation.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2 Upstream Oxygen Sensors\u003c\/li\u003e\n  \u003cli\u003e2 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: 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;\"\u003e2003-2006 Hummer H2\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\u003e6.0L Vortec LQ4\u003c\/strong\u003e \/ \u003cstrong\u003eGMT820\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;\"\u003e316-325 hp \/ 360-365 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\u003e213-4669\u003c\/strong\u003e, \u003cstrong\u003e234-4407\u003c\/strong\u003e, \u003cstrong\u003e213-1161\u003c\/strong\u003e, \u003cstrong\u003e213-4229\u003c\/strong\u003e, \u003cstrong\u003e234-4669\u003c\/strong\u003e, \u003cstrong\u003e6S694\u003c\/strong\u003e, \u003cstrong\u003e4S074\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 Hummer H2 Base Sport Utility 4-Door 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2004 Hummer H2 Base Sport Utility 4-Door 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2005 Hummer H2 Base Sport Utility \/ SUT Crew Cab Pickup 4-Door 6.0L V8\u003c\/li\u003e\n  \u003cli\u003e2006 Hummer H2 Base Sport Utility \/ SUT Crew Cab Pickup 4-Door 6.0L 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 GMT820 H2?\u003c\/h4\u003e\n\u003cp\u003eYes, this is a direct fit for the 2003-2006 Hummer H2 equipped with the \u003cstrong\u003e6.0L LQ4\u003c\/strong\u003e V8 engine.\u003c\/p\u003e\n\n\u003ch4\u003eDo I need special tools to complete the installation?\u003c\/h4\u003e\n\u003cp\u003eA dedicated 7\/8-inch (22mm) slotted oxygen sensor socket is recommended to avoid damaging the sensor harness during removal and torquing.\u003c\/p\u003e\n\n\u003ch3\u003eThe Hummer Durability Standard\u003c\/h3\u003e\n\u003cp\u003eBuilt to handle the immense thermal and mechanical demands of heavy-duty towing and rugged off-road operation, these sensors ensure precise air-fuel ratios to keep your H2 running reliably under heavy loads.\u003c\/p\u003e","brand":"VelocityMax","offers":[{"title":"Default Title","offer_id":67907918659832,"sku":"DS-E87CETLQ7","price":96.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/1290\/2648\/files\/o2-15464257585400-main-clean.jpg?v=1793395771","url":"https:\/\/performancechiptuning.com\/de\/products\/o2-oxygen-sensor-upstream-downstream-for-hummer-h2-2003-2006-6-0l","provider":"Performance Chip Tuning","version":"1.0","type":"link"}