One problem related to lose power steering has been reported for the 2015 Chevrolet Suburban. The most recently reported issues are listed below.
I received a recall notification from chevy (recall number 18289) and my vehicle had occasionally experienced some of the listed problems in the recall so I immediately took my car in to be serviced. After the the recall service my car seemed to be fixed, but that only lasted a few days. The problem is back and even worse than before. When turning the steering wheel at low speeds the my car experiences temporary loss of power, the entire electrical system shorts out briefly (radio, display screen, power locks all turn off/on) and the wheel becomes difficult to turn. Since having the recall problem "fixed", in addition to the above still happening, the wheel just loses power steering (very difficult to turn) or locks up without electrical loss and on two separate occasions all of the above has happened and my care stalls mid turn and I have to put my car in park to restart it. I have taken it to the dealer and they want to charge me to diagnose and fix any problems. I have also placed a call to Chevrolet and am waiting on a response. I am concerned and hesitant to drive my vehicle with this safety issue still occurring.