2003 silverado starts but dies immediately. New fuel pump, filter good. Checked all fuses and grounds. New battery. Was throwing code for o2 sensor. Replaced all of them plus camshaft and crankshaft position sensors. No codes now but still won't stay running. What are we missing? Oh also replaced positive battery cable. Any suggestions would be greatly appreciated.

 

I'd run a fuel pressure test if I were you.. Even with a new fuel pump your fuel regulator might be bad.