Refuel issue

Hey guys, I have a 2008 SR5 and I cant get it to fill past 3/4 tank most of the time. I'm showing no error codes and the dealership said I needed a new fuel tank to fix the problem. I tried using my air compressor to clear the line out the fuel door. Any ideas on how to fix it or will I need a new tank.

 

I'm no mechanic, but I had a similar issue with my old 2006 Trailblazer. mine appears to have been an evap system issue. I replaced the evap purge valve and the vent valve solenoid and the problem went away. started again about a year later...I replaced the purge valve again and the problem again stopped. Your problem may be completely different of course...just a thought