i have a 1998 gtp and i seem to hear a squeaking sound. almost sounds like something is spinning? (hard to explain) i don't always here it, but it's there a lot. and my antifreeze always seems to be low. i refill it way to often and never seems to be full. i think the noise is whatever the antifreeze problem is. would that be a water pump? i don't want to replace that then that have nothing to do with my problem. im younger so i only mechanically know things i've dealt with before. thanks for any help.