Under suggestion of a friend, removed belt to diagnose if problem was alternator. Removed serpentine belt & started van. Squeaking continued, so not related. Removed valve cover to check oil pressure/presence & it appears to be good. Unsure of what to check next, cannot pin point where the "squeaking" is coming from. Van stalls & will refire and start back up, but dies again within minutes. HELP, please :)