Safari won't start

Recently took van to pep boys which told us that they hooked up to di- machine and said all checked out with no fuel pump problem or anything else for that fact and they believe it to be an electrical problem. The van turns over but will not start. At one time it had a remote start, but no longer also has a alarm system and electrice brake system installed prior to us purchasing the van. I'm at wit's end trying to figure what the proble is and killing me with towing cost. Any ideas would be a great help. Thank you

Thanks for the info, I havent tried starting it with spray yet, but I will. If not I will do everything else. Thanks for the help. I hope it will start with the spray.

Thanks for the help. I just got the van to start using starting fluid. But it runs for a few seconds then dies. The check engine light has turned off. I just dont think it is getting fuel now. Could a fuse be the problem?

Engine problem
2003 GMC Safari 6 cyl Two Wheel Drive Automatic 65.000 miles

battery was low. Started with booster charger, van started then died, got an odor like plastic burning, van turns over fast does not hit, blows back like its out of time.

It looks like my pump is bad, no fuel pressure. How do I replace it?