Similar problem here, 3800 miles, just cruising the freeway at about 70 mph the Service Stabilitrak and ABS lights came on. I also noticed now when I make phone calls via bluetooth the loudspeaker works but nothing shows up on the radio and the DIC is dimming then going bright again.
Bone stock truck with no Mods and no off roading, made an appointment for next week, if anyone has anymore ideas what the possible causes are I'd like to know, otherwise I'll post up the results once I see the dealer.