Blower Motor???
 

2004 Monte Carlo SS/SC not blowing any air though vents on any of the fan speeds. Not blowing in AC or heat. Is this the resistor or possibility the motor?

did you check fuses? compare costs to all...but something else that could be the culprit could be the heater AC control unit. i just paid $125 delivered to my place off rock auto. i have also read on another forum that someone had similar issues and he replaced blower resistor, motor and something else with no luck so then he changed the ignition switch and it fixed it all. unsure of why or how, but hey it worked for him anyways.

Hello Johnny,
I would start by checking the fuses. If they are all good then check/ replace the Blower Resistor. Remember, you want to troubleshoot from the least expensive to the most expensive part.
If the blower resistor is good then I would check the climate control, then the blower motor itself.