Auto Parts: 2000 chevy tracker pulley missing?..., pulley system, chevy tracker

Question
Hi, this is T.  I have a 2000 chevy tracker 4x4, 2.0l, 4door.  One of the pulley from the engine belt broke out and I have no clud what's the name of it and can't even find the pulley.  I had ask around dealer and auto shop but the one they show me isn't what i need.  so far as i know, there are 2 pulleys on the engine.  One is locate on the right side close to the altornater and other one is left side close to the water pump and AC.  I'm missing the one on the left close to the water pump and AC.  I wonder if you could give me any detials on this pulley and where i can get it.

Thank you for your time
T

Answer
Hi T,

Sorry it took so long to get to your question, somehow it got lost in my email inbox.
OK, does the truck run? Is the check engine light on? Does your air conditioner work? Does the truck overheat?
I'm looking online now to see if I can find a diagram of the pulley system. What did the dealership call it? They should have been able to find it rather easily.
Let me know the answers to these questions and we'll get a little closer to the answer.