cannot fill my gas tank. gas will go in very slowly and run back out of filler on 2005 Chevrolet Impala

when i try to fill my impala, the pump shuts off. i have to use a gas can and pour gas in very slowly

by in Valparaiso, IN on April 16, 2013
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1 answer 1 comment
ANSWER by , April 16, 2013
relief vent for the tank plugged.
COMMENT by , April 16, 2013
where is the relief vent located?