Are there two drive belt tensioner pulleys?

I am purchasing the vehicle listed above b2600i (for next to nothing) from my friend's wife (tragically, he passed away). This pickup was driven into the yard and parked 10 months ago. All I can say is "people are pieces-o-sh#*!" They robbed her of everything from his firearms to stereo equipment to parts off his vehicles. Besides the battery, stereo, and fuel from the tank, there are other parts missing which are needed for it to run (such as the alternator). I'm sorry in advance, but I'd rather sound ignorant than remain ignorant. Correct me if I'm wrong, but this pickup should have 3 accessory drive belts, 1 for the power steering pump, one for the alternator, and one for the AC. First two questions are "shouldn't there be 2 tensioner pulleys?" & "Is the fan ran off the alternator's belt, or the AC's? (Both alternator & AC pump are gone, making it difficult to visualize)