Took my truck out last night and was with a friend, stopped at a light and we both noticed a weird vibration on and off noise that sounded like an electric motor running. The only thing I can compare the sound heard inside the truck is to a central AC unit fan ( Buzzz, Buzzz, Buzzzz) Didn't hear or feel it again until I got back to my driveway, got out of the truck with it running to check. It sounds like it's coming from the lower front, you can hear it but it's not overwhelming at all. Keep in mind the engine RPM's don't fluctuate and it doesn't seem like it's coming from the engine itself. The AC or any climate functions were not on all, so it's not related to that. I know I'm under warranty, just wondering if anyone had similar issues. Sounds like it's coming from lower the main radiator fans. We do have separate intercooler fans, correct?