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2021 Yukon Denali Engine Noise

11285 Views 20 Replies 13 Participants Last post by  blake0010
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 down, can’t hear it if window is rolled up)
  • When pressing the gas in between 30-50mph, you can hear the exact same whistling / spinning sound. (Can hear it with window rolled up)

Can any other 2021 Yukon owners confirm there is a spinning sound when it restarts from the Auto Stop function? Turn off the AC to help engage it into Auto Stop. Roll down your window and listen.

The dealership has stated the usual...this is normal and no we couldn’t duplicate the sound.

I posted videos of the sound on YouTube in hopes of confirming other either have the same issue or don’t. Look up 2021 Yukon Denali Engine noise and my vids should come up.

Thank you for taking the time to read this.
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We have a 2022 Yukon Denali with 6.2L engine that makes the same sound at the same times everyone here has mentioned. Has anyone received any update from dealership on how to fix it? We were planning on waiting until our first service to take vehicle in and ask about noise.
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