2001 2500 won't warm up..
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If its really cold out a cummins will do that. Have you tried blocking part of the grill? A piece of card board between the intercooler and radiator worked great when I had my 99. If that dont work the it very well could be your t-stat. Replacing is very easy. BTW it is not healthy to run for a long time at cold engine temps the oil does not protect well and can cause some major damge if run like that too long, like weeks or months, so just replace it.
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JoeRamsey26 (01-01-2014)
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