Well my car was running one hundred percent then all of sudden it started to act up for example my MAF sensor went and apperantly i also have to replace the pulley tensioner. I know the MAF sensor is really easy to change but i was wondering if any one here had good intructions of how to change the pulley tensior and belt because i personally dont think it can be that difficult. And where to get the pulley the tensioner for a Grandprix with a supercharger cause i can only find for non supercharged grandprix. Pics, Vids, and step my step instructions are defenetly welcomeso plz if any of you guys can help i would be appriciated.