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Old 02-27-2018, 07:57 AM   #2
shorod's Avatar
Join Date: Jun 2004
Location: Cedar Rapids, Iowa
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Re: 03 Yukon Xl Denali 6.0 Clunk/Growl/Whine Front End

The first thing I'd inspect carefully are the front wheel bearings. If worn they can cause the growl/whine noise as well as the clunk sound. Additionally they could explain the traction control engaging at low speeds (experienced that on my dad's S-10).

The clunk when shifting to reverse is a common sound on these GM trucks. GM issued a Technical Service Bulletin (TSB) for it and even re-designed the transmission output shaft with a different (nickel?) plating to help reduce the chances of the clunk. I don't recall what all years were effected, but it's worth looking in to.

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