Squeaking Belt

[GTS2SLO]

Hey guys im new on here but i have a question for everyone. I have a 2000 Trans am and the belt has been squeaking and ive tried everything i know from new belts to belt spray and everything else, Everything ive tried doesnt work. It squeaks alittle when it idles but idles all the time once it goes past 1k rpms. If anyone could help Id really appreciate it.

 

[melsg5]

How do you know it's the belt and not the bearing in the belt tensioner?

 

[GTS2SLO]

I will check that this weekend thanks I should have thought of that but I appreciate the help.