Hello, below are directions. You will see a small square opeing on the front of the tensioner arm. The square end of a socket breaker bar or ratchet if room to fit into that square to allow you to pull up on tensioner.
Drive Belt Replacement Removal Procedure
The info sent is for your vehicle per manufacturer. If your tensioner does not have a square hole, then you will need to see what you can use to lift up on the tensioner. In some cases there are special tools for this as well as there is a special tool for the tensioner with square opening. Below is pic of the tensioner and pic of layout. LMk thanks.