Tahoe won't take gas

[rcccm]

Tahoe began not taking more than 1/2 gallon of gas at a time. Replaced evaporator vent solenoid canister and purge solenoid, which was full of charcoal. Same issue continued while trying to pump gas and then check engine light came on. Replaced charcoal canister next. Check engine light went out, but gas is still spewing back out after pumping 1 gallon now. Line connected to purge solenoid is blowing air through it, so it's not clogged. Could there be charcoal clogging a line somewhere else? Anyone else have this issue? Really don't want to have to drop the tank and 20 minutes to fill up is getting really old.