White smoke advice
If any of you have white smoke when starting a cold truck and it doesn't go away right away have it checked out. In extreme cold, this might just be unburned raw fuel, but at temps a few degrees either side of freezing it might be EGR cooler and/or valve related. If this isn't addressed soon enough, the oil cooler could get compromised and leak oil into the coolant and coolant into the oil causing a big mess.
To check a leaking EGR cooler, jack the rear of the truck about a foot high and air down the front tires so there the EGR cooler has a good slope to the front. Remove the degas bottle cap and pressurize the coolant system (here you will need a special cap). Remove the ERG valve and look for coolant. If dry, all is good, if wet (even with a droplet) EGR cooler is compromised.
I speak from experience. Monitor oil and coolant levels, colors, and cleanliness. At the time of posting, my truck is in the shop having a new EGR cooler, oil cooler and radiator being installed, because of failure of the EGR system.