GMC Yukon gas tank filling issue requires extremely slow pumping despite replacing fill tube, canisters, and vent on GMC Yukon

Some GMC Yukon owners report experiencing difficulties filling the gas tank, even after replacing components like the fill tube, canisters, and vent. These issues may stem from the vent valve solenoid being stuck in the "closed" position, which is crucial for allowing proper airflow during refueling. Additionally, problems with the EVAP canister vent valve or its wiring can lead to the check engine light illuminating and further complications during fueling. Owners have also noted that the plastic valve in the system may rust over time due to ethanol fuel, causing it to stick closed and obstruct gas from entering the tank. This can result in the handle clicking off prematurely during refills, requiring a slow and careful pumping process to fill the tank effectively. To resolve these challenges, it is important to ensure the vent valve solenoid, EVAP canister vent valve, and associated wiring are functioning properly.