Need to remove the serpentine and drive belts on a 2004 chevy tracker ..cant seem to get the tensioner to move...am i doing something wrong??please help

My sincere apologies for the delayed response.
I am personally going back to answer your unanswered questions.
I have only been a free contributor to this site for the past 4-months.

I do not know if you still need this information, but I am going ahead and answering it anyway.

CLICK on the following LINK. It has several Belt Diagrams, one which will match your specific engine and options (AC/No AC, Power Steering, .etc) that you will need.

Regarding HOW:
Standard Rule to Removal the Serpentine Belt:
1. Find the Tensioner(s). (See the Diagrams on Link)
2. Using a Serpentine Belt Tensioner Tool or Wrench or Ratchet Tool: Rotate/Move the Tensioner Pulley/Arm away from contact with the belt and towards the area where the belt is not in contact with the Tensioner Pulley. The Tensioner is spring loaded, and is hard to rotate/move.
3. Remove the loosened belt off one of the other more easily accessed Pulleys.
Standard Rules for Installing the Serpentine Belt:
a. Pick a Pulley that is most easily accessed. This will usually be on top. This will be the last Pulley that the belt will go on.
b. Using the Diagram: Install the new Serpentine Belt on the remainder of the Pulleys....over, under, left right etc.
c. Using a Serpentine Belt Tensioner Tool or Wrench or Ratchet Tool: Rotate/Move the Tensioner Pulley/Arm "away" from Belt contact area on the Tensioner. This spring is pretty hard and with a new belt, it will be even harder to install. Rotate/Move this to as-close to the maximum ("open") allowed inorder to have enough slack in the belt to get it up and over the last pulley.
d. While keeping the Tensioner Pulley/Arm "open" Using your other hand - Pull the Belt up and over the Last remaining Pulley.
e. Before releasing the pressure on the Tensioner, visually inspect the remainder Pulleys and the Belts' Positioning on them.
As you can see in the last Diagram on this Link: there are three (3) Bolts for the FAN Belt that must be loosened inorder to successfully remove this Belt

Let me know if this helped...
Again my apologies..

http://www.2carpros.com/car_repair_information/year/2004/make/chevrolet/model/tracker/2004_chevrolet_tracker_drive_belt_routing_diagram.htm