My '97 GMC Sonoma blows cold air, but, it only blows through the floor and dash outlets as if it was set on defrost. The fan will blow at all speed settings but will not blow through the dash air vents no matter what you set it on, (A/C, max A/C, fan, defrost, or defrost/heat) I've checked 3 of the 5 vacuum hoses and they appear to be fine. The other 2 and I have not been able to locate. I have found no blown fuses or relays. Please advise what this could be and how to fix.
have the same problem?
Monday, July 5th, 2010 AT 7:39 PM