Recently my AC and heat have stopped working on my 2003 GTP. When I first turn the blower to 1, the RPMs increase slightly (as they did before when it was working) and I can hear the motor start. Within 5 seconds, the RPMs drop and nothing happens. This occurs on all 5 settings. I noticed when driving 55 MPH+, if i crack a window (aka create a pressure variance) hot or cold air (which every the thermo is set at) flows through the vents.

I have already changed the blower motor resistor with out any results. I am wondering if it is the motor itself since i have checked all the fuses and they seems to be okay. My defroster works fine, just no heat/AC.

I also live in the Detroit area and it is starting to get cold. Looking for any help I can get.

Thanks,
- El Ponchovilla