Car wont start with new ignition - 1992 Buick LeSabre

Attach a second battery to the one in your car so you don't kill it. Then, turn the key to the on position, then off three times, leaving it on the third time. The security light should then be flashing. Leave the key on for 15 or 20 minutes and the light should stop flashing. When that happens, turn it off then start the car.
I'm pretty sure I remembered the process correctly and it should work.

If it has a magnatic chip then it has to be relearned and you might have to take it to the delership for that, its a pain.