After fueling, and ONLY after fueling, truck starts hard.

[Red Blocker]

I'm the happy owner of a 2015 2500HD 6.0 Flex Fuel Double Cab.

When I fill the tank, I get in and turn the key, pause, then bump the key to start.

It will turn the starter longer than needed (3 or 4 seconds) then let go.

The motor usually fires, but once in a while she'll stall.

Mind you, this only happens at the pump. I have not had this issue any other time.

Thanks in advance for your thoughts and opinions!

 

Edited August 3, 2022 by Red Blocker
typo

[txab]

Had a boss that had this issue with his truck, 800 or 900 series, not sure. Ended up being an EVAP system issue, iirc

[newdude]

Purge valve sounds like its sticking either closed or open (don't recall which would do the hard start).

 

Purge dumps EVAP gasses into the engine for re-burning so if its sending those there when its not supposed to, you can get a hard start.  

 

 

Edited August 3, 2022 by newdude

[asilverblazer]

Had the same issue on a 2009 GMC Acadia, is was a small solenoid/valve/sensor like described above to EVAP Purge... I don't remember but it was a pretty common and easy job on that car. I suspect it would be similar for a truck.