Strange Humming noise
#1
Strange Humming noise
Theres a strange humming sound coming from under the hood when i start my truck and i can hear it while i drive until i hit about 30 mph. I checked the egr valve, power steering pump and serpentine belt, but the noise is still there, then sometimes when i stop at a light or stop sign my truck will vibrate or shake a little bit while it idles... Any suggestions on what to check next?