Attempting to push your car, trying to jack it into a new position or shoveling heavy drifts take great effort in storm conditions. Take it easy. The storm will end. You will be found. Conserve your body energy and heat.
Wet clothing loses insulation.
You'll have to evaporate the perspiration with body heat. Be sure you ventilate your clothing when you work. Keep fresh air in your vehicle. Open a window away from the wind for fresh air. It is better to be chilly and awake than comfortably warm as you slip into unconsciousness.