Could be the rear axle recall problem just hit you. I had mine go out suddenly 2 weeks ago with no warning after 3 years on my 21 Lariat. Started making a very similar noise. Had my truck inspected per the recall 6 months ago and it passed back then. Might want to have it checked out.
The code is also located on the BCM label under the passenger kick panel. You have to pop off a portion of the door sill plate and then remove the kick panel itself. Not too bad takes just a few minutes to do.
Does anyone have any idea why the battery voltage in engineering mode would read 0.0V?
Been doing a lot of research related to lack of updates for my 21 Powerboost and kept reading about battery voltage playing into it. Anyone out there think this might be my issue stopping the updates?
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