I also have a 2001 Cadilac Seville SLS and Im wondering how do you access the cars "self scanning" system? I recenty had the "check Gas Cap" light come, I obviously checked the cap and its sucure, so I had it scanned and they said that Cylinder 8 was misfiring. They told me its probably the EGR valve, so I replaced that. I still have the same thing going on. Besides wondering how to access the scanning thing, do you have any idea on what else might be making my car act funny? Thanks much.
Tuesday, January 4th, 2011 AT 11:19 PM