Heater Blower Resistor. There was a recall on this for the 1998's (maybe older as well). The recall involved installing a new resistor and a new thicker wiring harnass that can handle the heat of the resistor. This can be a do it yourself job, just need to solder, put some heat shrink wrap on and you are all set. 30 minute job at the most. My resistor is located directly above where the passenger would put their left foot kind of behind the glove box/dash. It is a white rectangle and can't be missed. I have heard it is in different locations on different cars. Look behind the glovebox on the left hand side and down a little, this is where most are.
