OT:fuel problem on tahoe

[70cst10_05]

I recently bought a 96 tahoe 4 door.....it has had previous fuel pump problems....yesterday it started acting up but there its this little wire that the guy rigged up so it would work...well today i get in it to go run around town and it goes about 4 blocks and dies and won't start.....i finally get it started and it runs for about 10 seconds and dies. This is all it will do. I figure i can leg it home so i do, and all the way home its fine and i get home and put it in park and it doesn't die so im thinkin its ok....i come inside and go back out later and it does the start and die thing......any idea what it could be??all help appreciated...
thanks,
kevin