Mechanics

CONTROLS

2006 GMC C2500

Air Conditioning problem
2006 GMC C2500 V8 Two Wheel Drive Automatic 780000 miles

my a/c runs for awhile than all of asudden the heater starts blowing on the driver side. Why?
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Scott WILLIAMS
October 14, 2010.




Oneof your actuators on theheater box isn't working correctly or the control unit is making it do that. This picture is similarto what you have. they can be electric or vacuum


http://www.2carpros.com/forum/automotive_pictures/406719_actuator_8.jpg


Hmac300
Nov 2, 2010.


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