🔧【For GMC】Oxygen Sensor Replacement for GMC 2011 2012 Sierra 2500 HD Cab & Chassis,2011-2014 Sierra 3500 HD Cab & Chassis,2003-2004 Sierra 1500,2006-2003 Yukon 6.0L. 🔧【For Chevy】Oxygen Sensor Replacement for for Chevy 2015-2010 Camaro 6.2L,2015-2014 Caprice 6.0L,2013-2010 Corvette 7.0L,2006-2003 Silverado 1500 6.0L,2012-2011 Silverado 2500 HD Cab & Chassis 6.0L,2014-2011 Silverado 3500 HD Cab & Chassis 6.0L,2015-2014 SS 6.2L,2006 Suburban 1500 6.0L. 🔧【Cautions】Pls carefully check your vehicle year & make & model with the fitment of Amazon and our description.Pls compare your part with our pictures, it must be completely same.If you have any questions, please email us, we try to answer all email within 24 hours. 🔧【Installation】STEP1. Locate the oxygen sensor position and remove it with socket, STEP2. Compare the new sensor to the old sensor to ensure a proper installation, STEP3. Please clean the threaded port to en sure a proper seal of the new sensor,STEP4.Gently tighten the sensor in order to keep wire free from damage and avoid sensor leakage, STEP5,Reinstail the connecor,try to clear it if the car has diagnostic trouble codes. 🔧【Warranty】1-Year Unlimited Miles Warranty. If the oxygen sensor does not fit your vehicle, we accept return. Please make the item clean and package in good condition. MAXFAVOR 234-4669 x2 Oxygen Sensor Replacement for GMC 2011 2012 Sierra 2500 HD, 2011-2014 Sierra 3500 HD Cab & Chassis, 2003-2004 Sierra 1500 2pcs Upstream Oxygen Sensor