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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. 2004 Deville overheating mystery

    Cadillac DeVille 1985 to 2005 including:1985-1992
    This car has stumped me, so I’m turning to the collective intelligence of the interwebs. 2004 Cadillac Deville DHS 238k miles Bought at 100k miles, owned for seven years. It has a history of overheating if the outside temperature is 90+ degrees fahrenheit. Downshifting to run the engine (and...
  3. 2004 CTS 3.6 over heating problems

    Cadillac CTS First Generation Forum - 2003 - 2007
    I have a 1st gen 2004 CTS 3.6 ltr. My water pump recently failed. Today I replaced the water pump with a brand new one. I also replaced all lost coolant with Dex Cool antifreeze. After doing all this I started the car and turned the heat up to the highest level. Upon reaching normal operating...
  4. 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...
  5. 2002 Deville base overheats can't figure out what's wrong

    Cadillac DeVille 1985 to 2005 including:1985-1992
    Ive got a 2002 cadillac deville base im gonna try to give as much detail as possible here. First of all car only gas 106000 miles... been driving it for about 6 months with absolutely no problems furthest i would go was about 60 miles and nothing would go wrong the car ran like a champ then...