squeaking

I have a "squeaking" sound coming form the rear driver's side of my motor. Sort of sounds like a cricket and it keeps time with the rpms. I had popped my hood because I thought I smelled gas, and wanted to make sure I didn't have a fuel leak. As I leaned down to check for that, I quickly...

I have had this squeak/noise coming from the motor. I have replaced the serpentine belt and the belt tensioner and still have the squeak. Does anyone think it is one of the pulleys now? Does anyone know where to find an accurate diagram with the pulley names? 2009 Dodge Challenger RT 5.7