fuel filler - fuel vent area leak

[3500]

I haven't used truck much in winter months as rear fuel heater is not turned on. 700 mi on truck. Last fuel put in 3 mo. ago. 3/4 tank of fuel in truck now. Fuel filler pipe inside quarter panel is wet with fuel drips hanging on it. Wiped off,but reappeared. It looks like it may be leaking from the approx. 1 1/2" x 3" canister which is tie wrapped to the fuel fill pipe. It looks like it is some sort of vent. It has like a 1/4" hose going to it. Has anyone noticed this on their vehicle? Taking truck to dealer next week to turn rear fuel heater on & check this. 2014 3500 purchased in Nov. 2013

 

[Kirwin]

Yes, I have had fuel overflow from this vent canister if I try to top off my tank. I'd think that if your down to 3/4s of a tank though maybe something is wrong. Parked at an angle or anything odd? Ken Irwin

 

[Gonzo 1066]

I had a drippage issue with my 2013 3500, Only happened when I tried to top off the tank like I used to with my 2004. If I stop filling the tank on the 2013 when the nozzle clicks off I dont have any drip issues.