blower motor resistor is bad
its a relay switch
Check the left turn signal bulb. It is probably burnt out.
my fuel pump is not work
If all of the dashboard lights do not work at the same time on a Pontiac Montana, check the instrument panel relay. The relay is located on the firewall in the engine compartment.
Replace the fan blower resister
If it looks the same it will probably work.
blower motor resister is bad
There is a resistor pack operated by the fan switch. It has failed. You need to replace it.
very well could be a bad switch.
The engine fan on a 2003 Pontiac Montana works by turning on when the engine reaches a certain temperature. It then blows cool air across the radiator and engine to maintain a constant temperature.
The first thing i would do is to check the switch of the door that is inoperable, i am assuming that you have already checked the fuses, so the similar problem i had is that the motor in my drivers side door is to weak to push up the window approximate cost to replace is about 40 - 60 dollars. I hope that this helps you out and good luck.
you probably need a new switch