Jump start the car then go to auto parts store they will check the battery for you and let you know what the problem is.Most likely the battery is shot.
what does it do
Try replacing your spak plugs. I had the same problem with my 85 Monte Carlo.
Put gas in the tank and try again.
You would diagnose the problem and either fix it or scrap the vehicle.
Check the fuses.
is the battery dead? if not check your connections and/or for corrosion
The security system shuts the whole car down so that it cant be stolen.
2001 monte sunroof will not close completely , where is the problem and how can i fix it.
Your heater core is likely bad
If your regular headlights wont turn on but only the brights for your Monte Carlo 07 then you're probably experiencing an outage in the light area. The fuse or the bulbs may also be the cause of the problem.
I have a 2003 Monte Carlo SS and the only time it turned off on me was when my radiator had broken and the car was over heating. Its turns off so it wont explode.
Transmission temp switch is most likely cause.