Not sure if this is normal, and been like this the whole time, but recently on cold days (below freezing) I've noticed on the first start of the day, I get about one second of white smoke. It's just a short puff, is this normal, or indicative of a problem? Only in the first start of the day, and appears to be a bit more if the truck has sat for a few days.

 

Normal! Water is a product of combustion and is visible when ambient air temp is below freezing. You’ll see it all winter long on any make and model vehicle where I live.

A drastic white plume or discolouration, pressure, and loss of level in a coolant reservoir is different though.