Deceleration noise
On occasion when I take my foot off the accelaerator after cruising above 60 mph, and before I touch the brake, my 01 Jimmy starts making a loud whining/humming noise. In the past I have toggled between the 2 WD and 4 WD buttons and this has stopped the noise. Last night when I tried it only quieted the noise for about 10 seconds and then it started humming again.
I have had the truck to my local GMC dealer about 4 times and they can't find anything since when I pull in, of course, the noise never happens. Thanks for any help.
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