My girlfriends blazer ('95 S-10 blazer, 4.3, 4x4) sounds like its got a sump and a big 'ole Aeromotive external fuel pump on it. I know Chevy's are notorious for having loud pumps, but I've also heard this is a tell tale sign it is going out. Should I be worried? We are taking a 20hr drive down to Tampa in 2 weeks... Should I be worried?