GMC DEFROSTER NOT WORKING

I Think It Is The Ambient Air Temperature Sensor But I Do Not Know Where It Is Located. My Ac Used To Blow Super Cold And My Heat Was...

I Have The Truck Listed Above Sierra C3500 1 Ton Extended Cab. The Trouble Is The Defroster Isn't Working. It Doesn't Get Any Air...

My '94 Gmc K1500 Z71 4x4, 54k Actual Miles -- Air Conditioning/heat Louvers And Defrost Outlets Seem To Be Stuck. I Get A Little Air Going...

What Does It Mean If The Heat Comes Out Of Vent But My Defrost Doesn't Work

My 2005 Gmc Envoy. Sometimes The Heat And Defrost Work, And At Other Times The Heat And Defrost Don't Work. What Is The Problem And Is It...

I Have A 1996 Chevy Blazer With 150,000 Miles. The Air From A/c And Heat Only Comes Out From Floor Vents And Defrost Windshield Vents. The...

The Fan For Air Doesn't Work Until The Dial Is On Max No 5, Also Noticed That When Its Turned On The Defrost Or Air Condition Mode The Ac...