1998 Tahoe fuel problems

[chevytrucks79]

Truck has 130k miles. My dad gave it to me because his mechanic couldn't keep it from shutting off on him. Somewhere on this site I saw that the hoses were a problem on the fuel sender, so I put a new one in last summer and haven't had any problems until this month. I am not getting fuel up to the engine. Using a schematic I found online I was able to confirm I had voltage leaving the relay box for the pump, so I thought maybe the connector had got loose, but when I dropped the tank I found everything was still hooked up. I had my wife try to start it so I could observe the pump while it was out of the tank, and the truck started right up. I thought maybe it was just a fluke occurrence and put it all back together. Well two weeks later it is dead in the driveway again. I dropped the tank and just like before the truck starts with the pump out of the tank. I'm pretty frustrated with this thing now. The sender I got was a Bosch, but looking through old posts it appears it might not of been a good choice. They only other factor that may be playing a role in this mystery is I am jacking the back of the truck up pretty high as to be able to get the tank out. Would that slope be doing anything to allow it to run? No, I have not changed the fuel filter, the dealer replaced it last summer and the fittings on the front connector are stripped out. (they wanted $900 to fix it)I have to redo some of the fuel lines to fix that. I am open to suggestions there also.