1996 Chevy Cheyenne TRUCK NOT GETTING FUEL TO CARB.

BOUGHT A USED VEHICLE AND WAS TOLD BY MECHANIC THAT ALL WAS NEEDED WAS A NEW FUEL PUMP, SO I WENT AHEAD AND CHANGED THE FUEL PUMP, STILL NOT GETTING FUEL TO CARB, CHANGED THE RELAY STILL NOTHING, WHAT ELSE SHOULD I LOOK FOR? BY THE WAY AFTER CHANGING THE FUEL PUMP I CHECK THE PUMP AND IT WORKED FINE SO THE PROBLEM WAS NOT THE FUEL PUMP ORIGINALLY. SPOKE TO THE OWNER OF VEHICLE AND WAS LATER TOLD VEHCILE JUST DIED WHILE DRIVING. CAN YOU TELL ME WHAT I SHOULD BE LOOKING FOR? ALSO I CHECKED ALL FUSES.I had also changed the in line fuel filter. IF I spray carb cleaner or gas into the carb it will start up then die.