Where are the vents on my GMC Sierra?
Where are the vents on my GMC Sierra? No output on dash face vents or defrost vents but floor works ok. I have tried the pulling the fuses both under hood and left of dash but that did not fix my problem. Is there issue with auto climate control not changing from vent to vent? Has anyone had an issue with the auto climate control not changing from vent to vent? Re: Fan Only Blows Defrost, Won't Change To Floor Or Vent. Pull the negative battery cable and re-install, making sure it is very tight (also check the positive to...