2003 Chevrolet Avalanche

Air Conditioning problem
2003 Chevy Avalanche V8 Two Wheel Drive Automatic

On my truck the a/c - heater. On the driver side does mot want to blow hot only cold I changed the control unit and still only cold the passenger side will blow cold and hot so what colud this be. Thank you
February 26, 2010.

Have you checked the blend door? There is one for each side if you have dual climate control.