I changed the fuel pump to my 2009 buick lucere because the car would not start. I tries to crank over but there is no power to the fuel pump. it has ground

Note the diagram for fuel pump. Are you missing anything else? Engine cranking, do you have spark at the plugs--fuel injector pulse? If you missing everything, have to check rpm signal, comes from crank sensor. If the fuel pump only problem, check the fuel pump relay. The relay has two sides, the load side and the control side. You can see fuse above relay in diagram. You could pull the relay, use jumper wire between cavities 30 and 87, 30 fuse protected and hot all the time, in diagram, you don't need the key, If the pump runs, the problem should be on control side of relay, left side in the diagram, The control side needs voltage and ground, the voltage comes from pcm. That's why I was talking about rpm signal. Just my opinion.