[tnbowhunter]

Basically what everyone else said, I got up this past Sat. morning to go hunting, as you know Sat. was probably one of the coldest days of the year so far. I had driven less than a mile down the road when the alarm and the light came on. I pulled over and checked the tires and they looked ok, on the way home the temp went up and about half way home [20 miles] the light went out. I checked the tires and they all had around 32 psi. I aired them all up to 36.
I think if you drive the truck enough and the tires are aired up ok the light will eventually go out by itself.