were is the canister purge valve located trying to change it and dont know were on 2003 Chevrolet S10

when i fill my tank its not letting the fumes go threw and it takes forvever to fill up

Asked by for the 2003 Chevrolet S10
I don't think problem is with your purge valve at all. Maybe hose that goes from filler neck down to fuel tank has a kink in it. Are you getting a check engine light? If you do have a purge valve problem you'd be getting a code pointing you in that direction.