Duramax Diesels Forum Truck of the Week
Old 09-21-2018, 09:05 AM
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mbc230 mbc230 is offline
Join Date: Apr 2013
Location: St. Louis, MO
Posts: 38
Default Air Conditioning Noise

Hello. I have been driving my truck and lately or even when I first bought it I hear like a clicking noise from the A/C vent to the left of the radio making a loud clicking noise only when the A/C is on high. When I shut the vent the clicking noise stops. When I set the A/C controls to a lower fan speed it the clicking is not there. It could be a clicking noise or even a knocking. Does anyone know what this may be? I am just curious so it does not develop into a bigger problem. Thank you in advance.

Also sorry if I posted this in the wrong part of the forum.
2008 Chevrolet Silverado 2500 HD CC/LB 4WD LMM. MBRP 4" Exhaust, 196,000 Miles, DPF Delete and Turbo Brake, 2014 Hard Drive OEM Navigation, 2011 - 2014 Onstar Module with Remote Start and Lock via Onstar application

Last edited by mbc230; 09-21-2018 at 09:36 AM.
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