I'm sitting at the dealer right now for the inspection. The tech told me they've had 3 failures of the ~100 inspections done so far. So I do not believe it is an 'everyone passes' scenario.
update: I'm another pass case. That's good I guess...?
Ditto on the TSB. Had mine drained and refilled and the problem cleared up. Dealer said they've seen it take 2 or 3 flushes to fully clear up and if it happens again to come back.
I ordered them from GM Parts Direct: https://www.gmpartsdirect.com/oem-parts/gm-spacer-bulletin-23-na-127-86532354
Some dealers may have them in stock if you call around and ask.
If you're wired, there is no interference risk.
99% of the time it is either:
1) A cable CarPlay cable. Even the 'official' Apple ones just randomly start having problems.
2) Pocket lint in your phone port. Use the tip of a paperclip or safety-pin to gently scrape the crap out of there.
Just to close the loop on this for anyone having the same problem - the dealer installed the Y171 update and my audio drop-out issues have not recurred since then. Took about 2 hours at the dealer.
I suspect the headlight question is for the fog lamps. When I'm driving at night, the auto-hi beams are useless b/c I'm always in traffic. I would rather have the fog lamps turn on with the headlamps (or remember their previous state) and not always switch back to auto.
My experience is that it's very dependent on the clothes you're wearing. We I have thin slacks or shorts on, it's obvious it's blowing and makes a difference. When I have thicker layers, the effect is difficult to notice at all.
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