1996 cadillac deville want start

chk fuel pump, chk fuel filter, if it was ran with less then half a tank dirt can clog the filter, or burn out the pump, some were ur car is not get fule to the right places.

yes remove fuel filter on tank side and turn on key. it will pump gas if pump is good

Yes, it should. If it is conventional (like other GM cars), the pump will turn on for a couple of seconds when key is turned to on. This will prime the system for starting. When key is turned to start (cranking), the pump is turned on again at the relay, and pump stays on as long as cranking the engine happens. Once engine is started, the oil pressure switch keeps the pump running.
The best way to check if pump is good is to use a fuel pressure gauge. If it does not have a test port called a Schrader valve on the fuel rail, the pressure gauge must be teed in somewhere convenient. But if you take off the line at the filter, some gas should come out with key on, and when cranking the engine gas should come out in a steady stream.

Yes it could.
Sometimes you have to jumper the pump relay to get it to run long enough to get the air out of the system and the new pump primed.

Check fuel filter!

I’m happy to help further over the phone at https://www.6ya.com/expert/pat_7f6b46a4565f904d

we just had to replace the fuel pump in our 96 deville, The mechanic said that running the car with a low level of fuel can cause strain that would cause it to break,

TPS throttle position sensor needs cleaning or replacment. or if you run the tank low on fuel you might be needing to replace fuel pump and filter.

first all i do all of the repairs on my cars and i have got a bad fuel pump once but i would like for you to checkout all of the wire and make sure they are right and after make sure the fuel pump relay is good and the fuse for the sending is good

actually it is a theft system problem. the car is acting as if it were stolen and was ran until it was out of gas. the system just needs to be cleared and the car will start right up.

First, obviously, put gas back in the tank.

Check the fuel pump fuse, (20 amp yellow fuse in the lower left corner of the group). If that is not blown, turn the key on and pound hard on the bottom of the fuel tank. The fuel lubricates the fuel pump, once it runs dry, the pump can lock up. Once the pump is immersed in fuel again, a sharp jolt will unstick it and let it pump up to pressure again. If it locks up for too long, the pump will burn out and need replaced.

We found this out by accident, got mad and pounded on the bottom of the tank and the pump jumped to life.