A quick check that will usually diagnose a failed pump is this: have someone crank the engine. While they are cranking it, you get underneath the truck with a hammer/log/piece of pipe/ --something to jar the tank with while the engine is cranking. Don't go king kong on it and tear open your gas tank, but pound on it (the side of a ball peen hammer works well) with a sufficient force. The pump is usually in the center of the fuel tank. If the engine fires, you know the pump is having problems. Chevroletkjun is right. GM doesn't have a very good track record with fuel pumps. IF you do get it running, there's a very good chance it may stop running again. When the pump fails once, it's bound to fail again, even if you can manage to hit it enough to make it run again. Hope that makes some kind of sense.