This is an auto speed sensor.The OE number is 12382860.It fits GM,CHEVROLET,Cadillac.This product is engineered to meet all the high standards set by the industry. It is known for its quality, performance and dependability and provides long, maintenance free life. This unit is put through a variety of tests under extreme and unusual conditions to ensure high quality and dependability.If you have any question,please feel free to contact sales2@go-world.cn.Thank you!