2003 GMC Yukon Fan Belt Replacement

There is what they call a serpentine belt on your engine. There is no (single) fan belt--there is one belt that drives everything--fan, powersteering, air conditioning etc. To change this belt is simple--just take the old one off and put the new one on, but MAKE SURE you observe the route of the old belt before you take it off. This will make it easier to put the new one on. To release the tension on the belt just insert a 3/8 ratchet (without a socket on it) into the square hole of the tensioner pully bracket. The use of a short 3/8 extention may make this easier. Let me know how you make out