The tensioner rides on a pivot. You should be able to loosen it enough with a box wrench to remove and replace the belt. There are special tools that can be purchased, but before getting one, check the local auto store and see if they have one. Here is a guide to help you step by step with instructions in the diagrams below to show you how on your car.
https://www.2carpros.com/articles/replace-serpentine-belt
Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Sunday, October 17th, 2010 AT 10:11 PM