2001 Chevy Monte Carlo It's cold

Well I don't know if this will be easy to fix need to know what the problem is first. Weather or not to take it to a mechanic depends on how comfortable you fee with using a digital ohm meter and doing some testing with my guiding you through it. Let me know what you want to do and we will see if can't get you heat. I do need to know does the blower motor come on and work with all speeds or not?

Ok I need to know if you have climate control or not. If you do is it single or dual zone climate control?

I also need to know if you have a digital multi meter so we can do some testing? If so then what I need you to do first is see if there is power at the blower motor with the selector set on any speed.

Ok there is a blower motor module connected to the blower motor. Looks like it has a 9 connector harness to it. Three look to be black, two go to the motor itselft and one goes to ground. Two orange wires one comes from the heater control should have power on speed 5 and the other should have power coming from the blower motor fuse 25amp. There is yellow speed 1, there is tan speed 2, there is lt blue speed 3, purple speed 4. Check for power to the module at the wires listed above when set on the setting listed for each wire. The voltage should increase as the speed increases. Let me know what you find ok.