2005 Buick LaCrosse "rendezvous p0446" Questions

fuel neck filler replacement, sensor or vent hose what is the secerect for getting the hose off Fuel Filling Troubleshooting Vent Solenoid - YouTube ? 2:53 https://www.youtube.com/watch?v=X7_6CYf_TAo ...

emission control system malfunction code po446 shows up on diagnosis. What parts should be replaced? The check engine light comes on, it reads the above and i reset it. Then several days later the ...