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Anyone else having a buzzing noise when temps outside are cold/ near freezing. Drivers side, behind dash.. 2007 limited. Had a 2004 that did not exhibit this noise during my ownership. It seems to only occur when the HL is warming up and driving out of my housing area at lower speeds. Sounds to be associated with foot action on either accelerating or braking applications. Not sure if it is accuator noise of antilock system, but definitely goes away closer to normal operating temp.
 

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Hard to tell from the description but could be throttle body motor Try cleaning it. If you think it is ABS or TRAC check the wheel sensor data. Could be a wheel sensor going bad or needs reseating.
 
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