Refueling my car in the winter, the pump continues to click off as if its full.

How do i fix it? The v8 5.3l doesnt have a vapor canister acording to Napa.

from what i am seeing,the canister is mounted on top of the fuel tank and the tank will have to be dropped if the canister is bad to replace it...NOW the Canister Vent Valve Solenoid is located below like where you pump the gas in the filler neck..copy and paste the link below,look at the picture..this is a paid site,but you don't pay because someone else has already asked that question..when the screen turns dark,just click on the drop down arrow to the right and the page will get bright again.. Pontiac Grand Prix GT where do I locate the EVAP control ... www.justanswer.com/pontiac/5nhw1-pontiac-grand-prix-gt-locate-evap...