Good tip by Oldfrog! Rather than going to the dealer, type your VIN into the below form. It will immediately show what recall work has not been completed or is outstanding on your 97. Of course only the dealer or reputable shops which report this work completed is included.
You don't need to register or login when checking for this recall work.
Link courtesy of a larger Jeep/Chrysler link supplied by member MrRoundel.
Now for the not so technical stuff. Next time you fill up and your gas gauge is super slow going up smack the bottom of the fuel tank with a 2x4 while then looking at the gauge quickly. Good chance it may go up pretty quick and really doubt if the gauge in the dash is bad. Good luck.