98 has a lump on the key with metal tabs on it. you ohm the key and buy a new one as per the ohm range. key syncs with the ignition harness box. old key in and to run for 10 seconds, remove key install new key. might need a dealer to fix that if it wont work right.
or hit up a junk yard, pull the harness and tumbler, some yards have the keys for the cars. you will need its key/keys. if you want to go all out and not have two keys, take the same cars door locks and trunk lock. they all come out very easy, just a clip holds them in.
unless yours is like my 98 regal, i got a door key and ignition key,
