It's was pretty cold this morning(-10 farenheit with a windchill of -40) and the duramax would turn over but not fire up. As the day went on I got it tosputter but not stay running. Any ideas?

 

Gelled/waxed fuel, you need to take off the fuel filter, fill it with something like diesel 911, and you need to dump it in the tank

if you have a heated shop or garage i would get it in there to let it thaw out and make sure you use anti-gel/anti-wax in every tank

 

Aight. That's about what I figured. No heated shop or garage right off hand. But it's supposed to be a high of 50 Thursday. Have to start using some affront them