OK I have an 08 1500 quadcab 4x4 hemi I took the time to go through alot of threads and no luck with this. My truck has a vibration in the gas pedal I and it is starting to drive me crazy. It not bad but it is like resting your foot on a foot massager on low. Dose any one have this problam or know what it is!
PS truck is stock

 

I know the older Hemi's were drive by wire, so there is not a mechanical connection between the gas pedal and the engine. Not sure about the 08, but I would assume so. Get upside down with a flashlight and wiggle the pedal around to see if it is loose. You only feel the vibration in the pedal? Is it related to vehicle speed or engine speed? What rpm and/or vehicle speed do you feel it at?