2020 SLT 1500 Fuel filler leak

[2020 SLT owner]

I have a 2020 SLT 1500 3.0.  I used a gas can to put in fuel.  Almost immediately fuel started to run out under the truck.  Fuel was not coming back out of the filler tube.  When I used a hose to push in past the second fuel flap the problem went away.  The gas can nozzles are not long enough to open the second flap enough.  After further tests I found that just pouring the slightest amount of fuel inside of the outer flap caused fuel to leak out.  Is this normal?  I would think that the fuel should come back out the front of the fuel flap if overfilled.  

 

Has anyone had problems with fueling up with a gas can?  Tried two different cans with same results.  With a funnel, only took part of a cup to start leaking.  I could also see that a full tank and the truck parked leaning a little to the left could create the same problem.  I don't know how that assembly is made with some plastic liner inside.  In the picture I see a couple of spot welds that might have a hole.  Fuel flows out near where the flat bracket and the cylindrical filler assembly meet

 

2020 SLT Owner

[reeseb]

Your truck should have come with a funnel to be used when filling from a gas can. My 2020 had one but, come to think of it, I don't remember seeing one in my 2021.

[rbdjr]

Yes if you dont extend the funnel 4" or more down the neck leaks out like a B....... Maybe its to let any water trapped on top of first flapper to run out, I have noticed same thing at fuel up if i lft nozzel towards top of neck to top off tank completly, big puddle under truck

[gemarsh]

Normal. Should have a black funnel in glove box, center console or under rear seat storage. 

 

 

 

 

 

 

 

 

 

[2020 SLT owner]

Thanks so much for the feedback.  Saves a trip to the dealer.  Answer was probably in the manual.  Service guy at dealership did not know of the issue.

 

[DiverRick]

Yes, you're looking for one of these.  Should be in the glove box or console.

 

I think you'll need it to add anything into your tank, not just from a gas can.

 

 

Edited February 15, 2022 by DiverRick