One problem related to engine exhaust system has been reported for the 1999 Cadillac Deville. The most recently reported issues are listed below.
Im disable I drive with hand control. As I was driven I notice a burning smell . And then my front window frog up with steam. And then I heard this load bum. My foot just start jumping around and I look down there were a pile of water hot . I pull over and notice that the heater core had burst which left me with a second and third degree burn on my right foot. I have not repair the car yet .