YES! I have fumes in the cab on a regular basis. I have taken it back to the dealer to no avail. There does not seem to be a rhyme or reason, but it has been doing it since new and now has 24,000 miles. I have gotten underneath and there does not seem to be any loose connections. Wondering if it could have something to do with the cab fresh air system. Can not find a TSB. Love to have some help diagnosing the issue.
Thanks,
John