Fuel pump resistors are a
HUGE problem with Grand Prix's. This is one of the major upsets I have with these damn cars.
It might not only be the fuel pump resistor, it might also be as simple as a lose wire on your battery, that restarts the computer and makes your car shut off. That was what was wrong with my grand prix, it wouldn't stay running long enough to pull into the damn driveway.
Take these steps first...
#1 make sure all your wires are properly connected to the battery and computer.
#2 Double check (just in case)
this branches off now :P
#3
a If your wires were loose, tighten them and start your car
#3b Check on the fuel pump resistor
#4
a Drive off and be glad you didn't replace your fuel pump resistor.
#4b pay to get it replaced