i had to replace the cylinder and key but wont start on 1997 Buick LeSabre

i used one from a 1992 lesabre

1 answer
The system will not let that key start the engine as it has no chip or the wrong one in it! Get some help from a locksmith or let a mechanic check it out.
May be able to cut a key from the new one that has the right resistance chip in it. Will need the orginal key also.
Locksmith should know what to do.