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.
Try replacing your spak plugs. I had the same problem with my 85 Monte Carlo.
Check the fuses.
what does it do
Could be turn signal flasher Check bulbs Could be a problem in steering column
2001 monte sunroof will not close completely , where is the problem and how can i fix it.
Your heater core is likely bad
turn key on pump accelerator 3 times hold on 3rd time till light changes
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.
If the alternator is good then the battery is bad.
You would diagnose the problem and either fix it or scrap the vehicle.