I have a 2003 Deville. Both sensors (upper and lower) are above and to the front of the oil filter. They are located behind the front engine support. I replaced mine today and thank God I have small hands. It took about 2 hours to remove them. You also have to remove the plastic pan under the front of the car. Installing new sensors ($40 each) went much quicker and no more stalling after driving the car about 1/2 hour. Last night I took the family to a restaurant across town and it stalled twice on the way there. I read on another post that Cadillac dealers charge $300 to replace them. Also, you do not have to drain the oil. The connectors were a pain, until I figured out how to remove them. Be very careful not to break them.
Saturday, November 3rd, 2007 AT 9:51 PM