One problem related to wiring has been reported for the 2015 Chevrolet Suburban. The most recently reported issues are listed below.
Water leak inside cabin. Water build up in driver side floor board, either coming from on star/shark fin antenna, can trace water leak up under the dashboard to where all the electrical wirings are. Lost on star and gps service due to this. Random dash light and interior light flickering. Two incidents so far where vehicle shuts off while driving. One on nearby street and other on the highway. Lost steering and braking ability. No electricity so could not turn on hazard lights to alert other drivers around me.