Jack up car mine is 2009 ss.
Remove passenger side wheel.
Remove black cover that's over the belt and on inner fender well.
Get tool serpentine belt tool from harbor freight like $11 or so.
Cut tool in half or it won't get in there, I moved red rubber piece to shortened tool.
If you cut it the exact correct length you can lock the tenssioner open resting it on the inside of the axcle
Use the tool from under the car-you do not have to bend it works great.

This took me 30 min total and was so easy. Stealership wanted $137.

 

Thanks

 

Awesome. I have a new belt, just need to get ambitious and put it on. I was just going to get the loaner tool for Autozone, but that's a good find at Harbor. How long did your tool end up being after your cut?

 

13 inchs

 

A thin 3/8 ratchet or a ratchet attachment for a wrench will work also

 

I just changed mine today. I had rented a serpentine belt tool from Auto Zone and it was too long, so I ended up needing to remove the engine mount and take it on from the top. A thin ratchet probably would have been easier.