96 Jimmy, Fuel delivery problem??

yeah i need some answers on my 96 jimmy..i had just got it in feb 09 and it was fine just needed light switch replaced but all was fine till about a month ago.found out i had a oil leak,tranny leak(unknown where)front right axle leak..also it would have a hard time startin up.So what happend was it stalled on me and would start back up.got it towed and the man said he fixed the fuel delivery and said needed a new fuel pump,just got it back on friday and then tonight it started again wouldnt start and then finally did after lots of tryin,not sure what to do!!!HELP!!!