I got the TSB done a couple weeks ago, as I've had this rear back up noise in wet/cold conditions since the day it was new (dec 2020 built badlands). HOWEVER, the noise is still there, arguably worse to be honest. They replaced the rear caliper bushings (from TSB) after a month wait to get the parts. A bit frustrating but at least we've had zero other issues after 25k miles.
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