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  1. Problems and Reliability
    1st time GMC owner and 1st post in the forum. I was hoping if any of you 2021 Yukon owner could see if you hear a whistling noise after the auto start cuts back on. Make sure the AC is turned off...helps engage the auto stop easier. I only noticed it after I stopped to talk to a neighbor and...
  2. 2021+ Chevy Tahoe & GMC Yukon Videos
    2021 GMC Yukon Denali First time posting in here and also a first time Yukon owner. 3 Issues: Makes whistling sound when car restarts after auto stop. (Roll window down to hear) When slowing down and it downshifts from 20mph to 10mph, there is a pronounced spinning sound. (Window is rolled...
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