Originally posted by socalstreetrods
Mike,
thank you - I will remove the fuse/power to the heater then address each vacuum hose as suggested (man-oh-man are there a lot of vacuum hoses on a corvette!)

Can a mechanical fuel pump make a noise (squeal)?

russ,
never heard one squeal, they can click like a bad lifter. don't pull all of the hoses off , take a pair of needle noise pliers and pinch them off one at a time.