I own a 2005 Cobalt base model. Last year I was driving down the road at the end of summer and it stopped blowing cool air. I switched to hot air to see if that worked. No air blew out. I didn't have the money at the time to get anything fixed but I took it to a mechanic and they told me that it does sound like the blower motor went out. Before winter hit I pulled into a parking lot, put the car in park and bam it just started working again. It worked all the way up till last month and when I was driving again it stopped working. Yesterday I replaced the blower motor and it still doesn't blow any air. I checked all the fuses, checked the wires for current, and wiggled wires to see if any bad connector. No speed works so I don't think it could be the resistor. Could it be the relay? Or what else could it be?