My trucks display, cigarette lighter, tcs light, blower fan, and dash lights will go off on the interstate when I hit the breaks, turn on my blinker, or mash my window button. Sometimes all of them will cause it sometimes none of them will. Also took 15 miles for my AC to start cooking properly yesterday. 2015 sierra with 10,000 miles with no mods. Gotta take i to the dealer now.