[studio1930]

Sounds like a voltage issue to me. Probably a simple fix. Mine did a similar thing. ABS sensor warning and the air suspension wouldn't operate during that warning. Went and had lunch and came back with no issues. Had dealer check it out and they found it was a low voltage warning and not an ABS warning (even though the 7" screen said service ABS). Problem never came back and all grounds are tight. My guess is the radio units are still drawing/draining too much juice and there are some voltage issues that cause modules to throw errors.

Just my 2 cents (and prior experience with over 5000 miles on this 2014 GC Overland).