Recently I have been smelling exhaust fumes in the cab of my truck when at a stoplight or parked in the driveway. When driving, the smell tends to go away. This occurs with the windows up and the climate control on auto. I can also smell this when I shut down the truck and exit. Has anyone else come across this situation? I am looking for anything that may be causing this. Hoping not to have to take it to the dealer.

Thanks,
Bryan