The snow on the side of the highway is all CGI.
The Red Truck is not a real Ford model must be a customer build.
While the main characters are decorating the Christmas tree, one scene shows an ornament near the face of the male character, next shot clearly shows the ornament in a different location.
After Lisa stops to help Kevin start the red truck she leaves and runs through is a stop sign in front of the truck never stopping.
The characters playing father and son--Daryl Shuttleworth and Mark Deklin--are only 7 years apart in age.