The good news is your working in a garage, you can go buy a couple large space heaters and turn them on when drinking your morning coffee to take the bite out of the air before you start .. I'm about ready to think about a 25 gal propane tank and a large industrial forced air propane heater and point it under the truck. LOL!
http://www.northerntool.com/shop/too...FY17fgodhF8Abw