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

Enthusiast 01be16a5a93688912f14755221fb15211b518d9a788cf01b455e03cc1bd585ac
I hear a clicking from under dash with HVAC on or off and in any setting
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.
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