Chevrolet Other

My 2001 Blazer when I last used it had 1/8th a tank of gas. Now when I go to start it, it won't start and acts like it has no gas. We have gas coming out of the injector and we have spark but it doesn't want to start. Can anyone help me? I know that I do have a bad oxygen sensor by the catalytic converter. Could that be the problem?
December 22, 2006.

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