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  1. ATS General Discussion Forum
    I have a 2017 Cadillac ATS coupe with an automatic transmission. I bought the car at 44k miles and it now has 48k and I haven’t had anything done to it. The car overheated and I immediately pulled over. I found brown sludge bursting from the coolant tank (first picture below). My first thought...
  2. 2008-2013 CTS General Discussion
    Hello everyone, I got a lot of technical help on my last post, more than I expected. So I’m back with a new issue. My 2008 CTS DI has started overheating bad. I already performed a combustion leak detection test, and the results were negative for exhaust gas. The cooling system is also holding...
  3. Seville and Eldorado Forum
    Hi everyone..... so I picked a 96 ETC and it is overheating.... checked the purge tube and it was partially plugged (poor flow) .... i cleared it, and now my question, it is still overheating , which direction should the flow be on the purge line. is is coming from the reservoir to the...
  4. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    Ok good day everyone let me start by saying I have a 2005 deville DTS she has 78,567 miles on her owned since 2010 bought with 58,324 oil change every 3000 she is a well maintained car ok so start by had no heat in car it was summer so didn't do anything right away she ran fine about two weeks...
  5. Escalade, EXT and ESV Forum - 1999-2006
    05 Escalade ESV fans weren’t coming on causes it to run hot checked make a long story short ended up pulling entire fan harness and going threw it to determine it needed a good ground. Fans worked still overheated so I replaced the water pump an thermostat truck appeared to be operating normally...
  6. DTS Forum - 2006-2011
    So I have a 07 dts it ended up overheating on me so the next morning I went to crank it up put more fluid into it it stopped overheating but the engine had white smoke coming from the top driver side and my exhaust wasn't smoking at all not sure whats wrong with it
  7. DTS Forum - 2006-2011
    I have a 2008 Cadillac DTS that is running hot. There is an issue the with the cooling fan not working properly, I just replaced the complete fan assembly yesterday and the same issue persists. The fans do not run unless the AC is on, with the AC on only the passenger side fan runs, this...
  8. Seville and Eldorado Forum
    60,000 miles on it, I do drive with a 45lb plate on my gas peddle so chances are it’s really bad but here’s what it does: 2 miles and it’s hot hot I can’t tell if water is moving in the system The purge line isn’t clogged but I took off from the reservoir end for 5 seconds and nothing came out...
  9. Northstar Engines and System Technical Discussion
    Okay so I have a 2000 STS. I replaced the thermostat ,water pump, coolant temp sensor, and reservoir. It used to over heat right away but after flushing the coolant it doesn't overheat while driving. As long as under 4k it's cool, but when idling and accelerating faster than 4k it overheats. I'm...
  10. ATS General Discussion Forum
    40,000 miles, factory bumper to bumper warranty still good! My car would overheat while parked and idling. I discovered the radiator fan would not come on. Radiator fluid was low. I pulled plugs and found it was running very rich. I took it to the dealer, and this is what they found...
  11. 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...
  12. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    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...
  13. 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...
  14. DTS Forum - 2006-2011
    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...
  15. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    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...
  16. FWD DeVille 1985-2005, Fleetwood, and 60 Special
    Heater cores on early 90s Cadillacs are a weak point. Let's all share our experiences on what we have tried, sucessfully and unsuccessfully to resolve issues and get the good heat back. Perhaps this thread might make a good "Sticky". I have a 1993 DeVille and a 1992 Seville and I've been...
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