Heater not working

What is your question?

Heater doesn't work in truck while running, it came on and than shuts off again. Pressed every button, nothing happens. It is 15 degrees below 0 right now, going to find a garage to thaw out truck and check fuses & relays. Any ideas will be appreciated

How long has your 2006 Chevrolet Silverado 1500 had this problem?

couple days