Do they make automatic locking hubs for 1997 geo tacker?

Yes they do. I have owned two 1997 4 door trackers and both had auto locking hubs. The GM dealer in Canada is a thief and quoted me $1640.00 ea. for them. But the Suzuki Dealer in Michigan quoted me $330.00 ea for the same part. You can check out Suzuki Forum .com lots of honest people tade and sell on there site. I may be able to hook you up with someone I know who may have a pair. E-mail me if you are interested. on_mitch@Yahoo.com Good Luck