1979 GMC C2500

Electrical problem
1979 GMC C2500 V8 Four Wheel Drive Automatic? Miles

well it ran out of gas so I put more in and it wouldnt do anything so I replaced the fuel pump. And still nothing. But when I put gas in the carburater directly it cranks up fine but dies after a few seconds. So I thought a hose was bad running from the tank to the front and I replaced it and nothing still. Help me please.
January 12, 2008.

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