here the deal my dads friend has a GMC jimmy with a V6. he was driving it at 60mph in drive then tried to pass some one on the road and shifted from drive to 2. Then he managed to get it some where by driving it they left it set over night went back and changed the oil that fixed the oil pressure problem for about 10 minutes. then it died. they pulled it home about 65-80 miles. it has not started since. I'm thinking of buying it for an engine overhaul project for school, but I'd like to know what all mite be wrong with it first. If you might know let me know Thanks to all that give me some advice.