I'm planning of leaving the truck plugged in the whole time I'm at work when it's extremely cold outside. Is it necessary for such action? It's free electricity so maybe I can take advantage. This is my first time to deal with a diesel during winter. Thanks for the input.

 

How cold is it where your at may not be neccessary Kyle Graham www.extremedieselperformance.net

 

It won't hurt a thing. My vote is to plug it in. If I were in your shoes (i.e. free electricity), I'd plug it in whenever the temp was below about 40F because I know I'd want the heater to work ASAP.