Oxygen Sensor O2 OEM GM 12589321
Original GM Oxygen Sensor (o2) - See applications below.
A GM Genuine Oxygen (O2) Sensor is a GM-recommended replacement for your vehicle's original component, and is a special feedback sensor on your vehicle's exhaust system. This sensor measures the proportion of oxygen in the exhaust gases. Using this measurement, the engine management computer can adjust the air/fuel ratio near the optimum value of 14.7:1. At this ratio, engine performance, emissions, and fuel economy are all optimized. This original equipment oxygen sensor has been manufactured to fit your specific GM vehicle, providing the same performance, durability, and service life you expect from General Motors.
(AC Delco = OEM GM manufacturer)
Cadillac
Escalade 2007
Chevrolet
Avalanche 2006-2007
Colorado 2009-2012
Silverado 1500 2006-2012
Suburban 2006-2007
Tahoe 2006-2007
GMC
Canyon 2009-2012
Sierra 1500 2006-2013
Yukon 2006-2007
Yukon Denali 2007
Hummer
H2 2007-2009
H3 2008-2010
H3T 2009-2010