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

i used one from a 1992 lesabre

Asked by for the 1997 Buick LeSabre
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.