Welp, found some dead spots at the top of the infotainment screen, and fails on recalibration every time. So, off to dealer for a checkup and free wash next week. Good thing I have GM extended powertrain and accessory/electronics-electrical warranty. Now I get to see what it's worth.
In the meanwhile, milage seems to be on the uptick, even in the snow and with AWD on. Riding better with proper tire inflation, but still on the fence with the Ranchos. I do about as close to zero off roading as you can imagine, so I don't require an aggressive shock. Don't tow or haul much, but it does happen.