Rendezvous wont start
 

My 2002 Buick Rendezvous cranks but wont start. The car stalled while driving home one day and would not start so I towed it back to my house and the car starts right up. This happed several times that month and I noticed when it wouldn't start that the fuel pump wasn't priming when I would turn the key. I replaced the fuel pump and fuses and relays and checked the wiring. The car ran great for a month and then the same problem and now it wont start at all. I need help any advice is greatly appreciated.