Hello. My 1997 Chevy Tahoe refuses to start. The problems began with a bad fuel pump. I changed. It worked. The fuel pump died again. I changed it again and it has been working. I parked it for two weeks. It wouldn't start. I changed the starter and it did the same thing. I took the old starter and the new starter back to the store. They were both bad. I exchanged for a new starter and put it on. It does better but still won't start. I have checked everything I can think of and it still won't start. The battery is new and fully charged.