With mine, I've had no issues, switching between driving modes etc. Using the auto lift function as well has been simple enough.
I did recently ~1-2 years replace air shocks on my Tahoe (different less compact animal yes) but I don't know how involved it would be to replace them on the 7 just yet. Maybe look through some of the tech docs pinned to the top of the board, might give an idea anyway.
Hope it works out for you though
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