2003 Chevrolet Silverado 1500 Pickup Owner's Manual - Page 330

Put on extra clothing or wrap ablanket around you. If you have no blankets or extra clothing, make body insulators from newspapers,burlap bags, rags, floor mats - anything you can wrap aroundyourself or clothing to keep warm. tuck tinder your Snow can trap exhaust gases under ysur vehicle. This can cause deadly CO (carbon monoxide) gas to get inside. CO could overcome you and kill you.You can't see it or smell it, so you might not know it is in your vehicle. Clear away snow from around the base of your vehicle, especially any that is blocking your exhaust pipe. And check around again from time to time to be sure snow doesn't collect there. Open a window just a little on the side of the vehicle that's away from the wind. This will help keep CO out. Run your engine only as long as must. This saves you fuel. When you run the engine, make it go a little faster than just idle. That is, push theaccelerator slightly. This uses less fuel for the heat that you get and it keeps the battery charged. You will need awell-charged battery to restart the vehicle, and possibly for signaling later on with your headlamps. Let the heater run for a while. 4-49