It is a DIY job. Remove the bottom trim panel to gain access to the forward side of the engine. Remove the oil filter adapter to provide room to get your arms in there. If you replace both sensors, be sure to note which one is in which location. Be sure you have new O rings if they do not come with the sensors. And new O rings for the oil filter adapter. I find that 1/4" drive sockets etc. do just fine.floridaguy said:I've got a 2001 Deville and it is showing a diagnostic code PO385. I believe that is crankshaft position sensor. My local dealership quoted me $500 to replace upper and lower sensor. Is this something I could do myself? Any help would be appreciated. Bob
You might find that one of the connectors is not seated properly and that is causing your problem rather than a bad sensor.