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  1. '98 Deville - usual Northstar problems?

    Northstar Engines and System Technical Discussion
    I’ve gotten ahold of a beautiful black 98 DeVille Elegance with only 69,000 miles on it. The car drives great on the highway and most short distances, but there have been 2 times where the engine has overheated (240 degrees or over) once while stuck in traffic after being on the highway, and the...
  2. Radiator fan not turning on

    Cadillac DeVille 1985 to 2005 including:1985-1992
    Hello, I am posting in reference to my 1995 Sedan DeVille 4.9L. The radiator fan (I know there are two) is not working. I am talking about the one on the passenger side of the car, in front of the radiator. I have tested several things including fuses, relays, and wiring the fan directly to a...
  3. 2006 DTS Issue with A/C and Radiator Fan

    Cadillac DTS Forum 2006 through 2011
    Hey, all: So last week my A/C stopped blowing and I got the service engine icon on my dash. On Friday while idling at a drive-thru I got dinging and my engine was overheating. My coolant was low so I added more coolant the next day. I checked the codes and I got the following:P0412, P0418...