I didn't get to look under the hood it was passing through where I work the truck is a rental with a rental camper on it. The only reason why I recognized it was a 2011 was the front grille which I thought looks good the head lights look okay. Now for the engine can you hear the thing running ? barely that isn't a diesel but it was the thing was very quiet. Unbeleiveably quiet I would like to see under the hood of a 2011 there was barely any exhaust smell either. How is some old geezers that are hard of hearing know if the truck is running I think you will be hearing lots of starter screach as the are trying to start a already running engine.