My 2000 Chevy Impala had the same problem about 3 years ago. Reading your posting was about the same thing I would have written. I didn't replace the fuel pump, but I did replace the fuel filter.
I found that the Crankshaft Position Sensor was the cause of the problem. I was told that the Ignition Module could also shut off the ignition the same way, but I can't imagine an intermittent problem with the ignition module.
I performed a mini-failure analysis on the removed Crankshaft Position Sensor and didn't find any obvious damage or flaws. The only strange thing I found was a build-up of metallic dust on the only magnetic area of the Sensor. It may be that if this metallic dust was removed, it just might correct the problem without replacing the Sensor. If mine were to develop the problem again, that's the first thing I would do.
I would advise changing the Crankshaft Position Sensor first because it is by far the least costly.
Tuesday, July 21st, 2009 AT 2:16 AM