2013 Buick LaCrosse - Won't start

my car was low on gas I went to put gas in the car and got back in the car and won’t start I replace the batter and starter and can still won’t start

What do you hear when you try to start it? Does the engine make the usual sounds of turning over (cranking)? But fail to start and run?

Fuel pump would be my first concern. Do you hear the pump running for a few seconds when you turn the key on? If not, check fuses, check relay, check pump test terminal for power. Check for fuel pressure. Injected cars don’t like to be run dry and it can take a while to prime the system again.

Hold the gas pedal to the floor and see if the engine starts.

Tester