I am with larry that using the block heater, even though my owner's manual says you only need it when it gets down to 10F, when it's 'cold' out is a good idea. I am going to put a timer on it to run it for 3 or 4 hours before I need to leave in the morning. Since my tranny seals are not what they used to be (sealing correctly)
the block heater is an even better idea now. Heats the tranny up a little which means it will shift better when I get going.