Loose female recepticle for fuel pump relay. Relay must be forced into a specific position. when I hit a bump the car stalls and thye relay hs to be repositioned.

A couple of quick things check fuel relay switch and fuses, Ignition switch also was the car bump or hit locate inertia switch in trunk area.

JUST BEND THE PINS ON RELAY SLIGHTLY AND REFIT

Changing the relay will fixya!

the ground fell off of the fuel pump or the plug came loose. its between the tank and frame. pull the wires down until u see the connector. unplug clean and plug in. I would check the fuse and relay first. usually there is another relay that is the same as the fuel pump in fuse box. switch them and see if it works

I would start by checking your wiring connections at fuel pump, check for corrosion, or loose fir male to female, then I would check your ground wires for fuel pump and engine also. you could have a wire hanging by a thread in the fuel harness or a ground wire that is making poor connection and when you hit the brakes possibly pulling ground for brake lights from fuel pump circuit, got to be something fairly simple but intermittent problems are the hardest to find, also check fuel pump relay and connections it plugs into. if can't visibly see anything then time to get the dig. volt meter and start checking wires from point A to Point B this will take time but it's about your only chance of figuring it out.

You have a ASD relay (Auto shut down relay) this is not a safety device you basically knock something loose.Turn the key on do you hear the fuel pump go on. If you dont check the fuses for a open condition and fusable link that are on the battery with key on wiggle battery negative terminal especially at the engine block and the frame ,same with the Positive part of the battery terminal .

The fuel pump relay is twice fused. The relay power is provided through a fusible link connected at the starter post that the positive battery cable connects to; and there is an in-line fuse inside a cube shaped plastic box near the relay. Either the fusible link or the inline fuse is blown, or there is a break in the wire that runs from the stater post to the relay.

Check the power wires on the fuel pump and make sure that it is pumping fuel to the engine.

Its a possibility that something under the hood could have come loose when you hit that bump.

Check everything, all electrical connections, and all fuses.

yea you have no fuel and sound like a bad harness and the gm's are know for there fuel pump harness's! did you change it when you changed the pump? there is a lose connection somewhere in the fuel delivery system and it's pretty simply! i would check the fuel pump relay on the left hand side of the engine compartment and maybe even put power to the pump at the relay position "b" on the fuel pump relay harness and there should be a one pin connector to put power to also connected to the same position on the relay "b" the wire should be tan and white! good luck