I'm guessing by "environmental diverter" and "blend," what is meant here is part of the ventilation system (a flap) that diverts air to the vents that opens at every start-up. It does make the sound with AC off. I should try it with every variation of fan speed & temperature...
The sound comes...
Hi y’all,
2015 GTI , 63k: on startup has this funny squealing/groaning noise for a few seconds, thegoes away. Doesn’t occur at every startup.
Here’s a video of the sound:
Thanks!