1998 Deville was drove to work came out it wouldn't start replaced the battery. Now it turns over but wont start. Any suggestions?

Usually it means the computer is not accepting the chip in your key.
It can be the key, the sensor in the lock cylinder, or something in the security module or computer.
You might try another key or lock and unlock the driver's door with the key.

check if security light is on wile cranking or may blink

Sounds like fuel issue, remove the black plastic cadillac cover on the top of the engine, then find the fuel rail on top, and remove the black tire cap looking thing on the end of the fuel rail. Now you will have to get a fuel pressure guage ($45), and screw it on right there. Or you can also just poke that little valve with a ink pen to see if any fuel squirts out, it should come out with alot of force, it is like a valve on a bicycle, it only lets fuel out when you push on the valve ***. As for the battery being dead perhaps you left your parking lights on? My 97 deville, had a cold start problem, that it took 5 minutes of cranking off and on, to get it cold started, but after it was running it would start throughout the day just fine. I ended up replacing the fuel pump in the tank, and the fuel filter on the rail.

remove the power from the battery..... that resets everything also you might have a dirty fuel filter now might want to replace it

have diagnostic codes checked to see if you have a cam or crank sensor fault. make sure fuel pressure is at the required pressure, just testing to see if you have fuel at the valve is not enough. replace all spark plug wires. if you replaced two then all are just as old and even when they "look good" does not qualify as "they are good". Replace coil pack. start up drive away happy

Hello: When you turn the key on the fuel pump should run for 2 seconds if it isn't the check the f/p fuse, relay and it could be the pump itself. You might take a hammer and beat on the bottom of the fuel tank (in the center) while someone is holding the key in start (turning engine over) if it starts you have a fuel pump problem. (pump in tank)

sounds like your on the rite track . clean the contacts at the batt and at the starter and get back to me

Your GM product has a safety alarm, it shuts down the radio , or locks it.
I send ours to a GM dealer to get it unlocked. They don't give those codes out.

if the battery is good and you jump the starter she should run otherwise you may have a sensor issue, try to get a hold of a code reader and see if any codes have popped up..