Help!! 99' Suburban Fuel Pump Replacement

Just replaced the fuel pump in my 99 Suburban. Replacement is an AC Delco unit. When I tried to start it, nothing. Engine turns over but doesnt start. Checked all connections and getting voltage down to new harness. replaced relay from GM dealership and also fuel filter. I used to hear the old pump prime when turning on the ignition but dont hear anything with the new pump. Could it be a bad pump out of the box ?? Any help would be appreciated. TIA

Yes it could be - or a bad relay or both.