thanks for the help everyone..... i now have anoter problem.... when i get around 4000 rpm's, my battery ligh flashes on and off. am i correct that this is the alternator? also, when i bought the truck a month ago, the guy replaced the alternator with a used one out of the junk yard. after he changed it, thats when my temperature gauge started pegging out on hot about a minute after the truck is started.......any way a bad alternator could caude the gauge to mess up??