Can not remove ignition key on 1994 Chrylser Concorde

It's very possible you have a bad ignition switch. My '96 LXi had the same problem, plus it tended to randomly drop into "Limp Mode" at any speed.

After replacing the ignition switch (3 years ago) neither of those problems has resurfaced.

Some chrysler vehicle have a button in front of the ignition on the steering column that has to be pushed to remove the key other wise replced the ignition cylinder itself

The Ignition Key assembly has a loose wire at the back. Remove it and fix the wires. The other possibility is that your Ignition Key assembly is faulty or damaged. Sometimes, if the wrong key is inserted, it could cause permanent damage of this kind.
These apply to all cars.

under dash ,,on top of steering colum at the bottom,

Maybe in here you can find information about Wiring Alarms:
- Commando Car Alarms (for 1994 Concode)
- 1994 Chrysler Concorde Alarm Information

I hope helpy you with this. Good luck (remember rated this help).

change crank sensor? if so replace control module (ignition module)

I have a 1999 Chrysler LHS and have had the rear struts done for me. You have to remove the back seats to get at them. I know its not the total solution, but it should put things in a better perspective for you.

make sure the battery cables are touching metal to metal. Sometimes the rubber around the battery cable can get pinched in between and not letting a good contact. You could also place a washer between the cable and the battery.  If this does not help try banging your solenoid while someone else tries and turn over the vehicle. Make sure your solenoid is not shorting out. 
After you have tackled these tasks and you still are having problems, then I would expect ignition

check the ignition swich, may have some bad contacts, try to move it around with the key in it if the gauges go on ,this could be the problem. I had this happen to my car.
check the fuses,. make sure your battery is good.

Push The Key IN Then Turn