Gas spilling out of tank

[NewAtFixingUsed]

So about a 3 weeks ago, I had my fuel pump replaced. About a week ago I was filling up my car with gas, and it started overflowing once it was completely full (not coming out of the nozzle, but from somewhere under the truck). It doesn't spill out if I only fill it half way full. Any suggestions?

I'm thinking that a hose might just be loose.

I am brand new at trying to fix my vehicle myself, so any info would help!

I have a 2003 Cadillac Escalade V6 AWD

[DeltaP]

Take it back to that repair shop. Someone left the inlet pipe to tank hose clamp loose.