Dryer would turn on, but the barrel did not tumble

I was pretty sure that given the age of the dryer, the belt had gone bad. I found an online manual for my model, and was able to diagnose the problem (removed the front of the dryer and found the ends of the belt :) ). I then searched on the Internet for the part, and PartSelect had it, in stock, and with same day shipping. There were even printed instructions inside the bag showing just how to properly install the belt - sweet! I slipped the belt on via the opened front, then did the final adjustments (putting it on the tension pulley and motor shaft) through the access panel in the back of the dryer, just like the instructions said. It may have taken me a shade over 30 minutes only because of all the maneuvering I had to do between back and front in my tight laundry area. For less than half of a repair call alone (not including the actual repair and parts) I was back up and drying!