For sale is a front sensor that came out of a 2007 Chevy Express Van. It had been tested and works as it should. This will also work in GMC Savana just make sure that the part number 10371101 is the same on your sensor and this will be a direct match. These sensors do fail. That is likely the reason why you are looking to buy a replacement. What you get with untested sensor is 50/50 chance of buying another failed unit. Every sensor that I sell is tested and guaranteed to be good.
