If it is a 98 and the original belt REPLACE IT. Pickup a new belt at the dealer, the 98 remove/install is pretty easy depending....
Easy way, spend $35 on a very long thin 15MM box ratched wrench from Mac tools, fits right on to the idler pully under the power steering pump, loosen that pully maybe 1 turn. Look to the left of the PS pump and you will see a bolt head sticking up, start turning it and you will see the idler pulley start to release, back it off quite a ways as the new belt will be shorter than the old one. Remove the old belt and install the new one. Take note of the routing, it should be on the top of the radiator, little orange or yellow diagram. Make sure it matches your routing. Use a Krikit II belt tension gauge available from NAPA for $12 to set the tension to around 190lbs for a new belt and 160lbs for a used one, used being one that has been run 15minutes or longer. Unless you have a calibrated finger your best guess will get it to about 90lbs, use the gauge. Then don't forget to tighten the idler back up once you have it adjusted.
Harder way but $35 cheaper, same as above but remove the electric fan first so you can get a wrench on the idler pulley. Then put the fan back, be careful of the fan disconnect, it has two locks on that connector so don't force it. I've done it both ways, now I have the wrench. Tried sears for one but none of theirs were long enough and snap-on was even more expensive. For me that wrench now resides under my rear seat, along with my original belt. I would not want to be pulling that electric fan and stuff on a cold and stormy nite because a belt failed. They never break in nice weather where your tools and parts are handy do they !!!