noise from acuator doors??? on 2004 GMC Sierra 2500 HD

I hear a clicking from under dash with HVAC on or off and in any setting

by in Point Pleasant Beach, NJ on May 16, 2012
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1 answer
ANSWER by , May 17, 2012
You may have a problem with the BCM that controls these functions at the actuators. Have a qualified tech attach a Tech II tool and monitor the circuit.