My 2001 Monte Carlo won’t start. It cranks but won’t start. The battery is good. Haven’t tested the alternator but don’t think it’s bad. I have no clue what it could be. Can anyone help??? I replaced the blower motor resistor and right after that it started but then sputtered and died. My fans did start working though from speeds 1-4 so I know the sensor worked after it was replaced. I also replaced the fuel filter thinking it wasn’t getting proper gas flow and still nothing.

 

Have you looked at the starter?