what would cause fuelpump to not come on on 2002 Chevrolet Trailblazer

ran car to store ran good. Left store and it died will crank but fuel pump will not run.(already tried new pump same prob.) can anyone help

Asked by for the 2002 Chevrolet Trailblazer
Could be the fuel pump has failed...or theft deterant system is not reconizeing the ignition key thus computer disables the fuel pump..