I have a 2003 suburban 1500. The ac control module has an attitude but still worked. I lent the truck to my brother who brought it back without the ac working right. The fan would not turn off even with the key turned off and removed. The back air works great. Ideas? Relays! control module! Help!!!

 

I have A similar problem. My fan works when it wants and only at one speed. Sometimes it will not turn on and sometimes I will go back out after some time and the thing is still going. Any help out there?