They are most likely auto hubs. Look at the front hubs and if they do not have a straight piece going across the center with a slot on either side then you have auto. That is, the auto hubs have nothing to grab hold of in order to twist. The hub will be smooth across the face. If manual, simply squat down and look closely. You will turn them one direction or the other and it should be indicated on there. My 97 is auto with the floor lever. If the light comes on I bet they are auto.