🔧【Applications】Fit for GMC 2008-2014 Savana 1500 4.3L/5.3L, 2008-2015 Savana/2500/3500 4.8L, 2013-2015 Savana/2500/3500 6.0L. 🔧【Replacement OE#】234-4336 75-4336 ES20044 23039. Pls compare your part with our pictures, it must be completely same.If you have any questions, please contact us. 🔧【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 ensure 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. 🔧【Buy With Confidence】If the oxygen sensor does not fit your vehicle, we accept return. Please make the item clean and package in good condition. Maxfavor 2Pcs Upstream O2 Oxygen Sensor Replacment for GMC Savana 1500/2500/3500 2008 2009 2010 2011 2012 2013 2014 4.3L 5.3L 4.8L 6.0L 02 Sensor Replace 234-4336 75-4336 ES20044 23039