If you still don't have fuel at the rail you'll need to check for power going to the fuel pump. There is a lead by the battery that goes to the fuel pump. That lead should have 12 volts for 2 seconds when the key is turned to the run position & a constant 12 volts while cranking. If you have 12 volts then I'd put more gas in the tank. If you don't have 12 volts the fuse is on the passenger side behind the glove box. You can also check for 12 volts at the pink wires going to the fuel injectors. I can't recall if the fuel injector wires are long enough to put them on the wrong injectors. Double check it.
1999 Pontiac Bonneville SSEi (son'*)
1997 Chevy Lumina (daughter'*)
2006 Chevy Trailblazer (wife'*)
2006 Chevy Monte Carlo SS (Mine! -Zoom Zoom Zoom)