Are there any bulletins that reference those two codes? Something to do with the emissions. No driveability issues, but sometimes the idle is a little rough and the smell of gas in the cab. Filling up is a nightmare, it will stop the pump 30,056 times before it is full.
Looks like a trip to the dealer. Don't really need any TSB's for those as they are evap and purge related. Reasons why you are smelling the fumes and hard to pump gas. They should fix those without any incident.
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