2017 acadia can't fill the gas tank (can't fill up/can't top off) solved
just wanted to share this, since my dealership acted like mine was the only car doing this when it clearly isn't.
From new, my wife and I wanted to know what kind of mileage our car was getting, and wanted to verify the DIC readout, so we drove from the dealership with a seemingly full tank of gas, and headed home. this was a bit of a trip, and we managed 35MPG. Great! so, with the gauge showing low enough I felt I could get an accurate fill up (around 3/4), I proceeded to the gas station to fill up my brand new car and verify the DIC only to be there for around half an hour and get frustrated that my brand new car wouldn't fill up. I tried 3 different pumps, tried moving the nozzle around, in/out, ect... to no avail. Back to the dealership I go... They couldn't figure it out, and said they needed to call GM, ok, fair enough. two days later I call them and ask what the deal is.
Apparently there is some kind of fuel level sensor besides the one on the sending unit that closes a flap in the filler neck when it think's the tank is full. mine thinks it's full when it isn't, and GM has already made a revised part (not sure wtf is going on, this car was (wait... where the **** is the mfg date on this car?) presumably just built not that long ago.
so GM knows this is a problem, and has a part to fix it if anyone else has this problem