No problem, we are all here to learn about our trucks, ask away. I live up in B.C.. When I go up to the interior, it's been about -15 or so, and I haven't pluged in yet. I haven't had any problems with starting at all. but you have to make sure you glow plug system is working properly. As far as gelling goes You shoulden't have a problem with that unless you spend long periods in extreme cold. Make sure you use a good additive in the tank and run it through the system, I put it in every time I fill up. there are several different makers-Diesel Clean-Stanadyne-Hawes etc. its up to you which one is right for you. I use Diesel clean myself. Just make sure it says it helps prevent gelling on the bottle and you should be fine. When fuel gells, it's just to cold, you have to heat everything up to get it back to it's normal state. Hope that helps you out.
Gord.