Guys, this is a very common problem in these cars. If all you get is a quick flash message during or right after start, it's because the car's been turned over before that portion of the system has "loaded" or booted up. No, I'm not kidding. HOw this was not discovered in testing by GM is beyond me, but once I figured it out, the message has never been back. And, I can recreate the message with a hasty start.
Before you stress out and go to a dealer, try this. Works every time for me.
Close your door. Turn the key over to "on" (not start) and let the gauges sweep and the seatbelt chime, and all usual warning lights extinguish. I think the seatbelt chime 'dings' like 3-5 times. THEN, turn it over to start and let the engine start. Shouldn't get a message. Ever. Unless there's something actually wrong with Stabilitrak, in which case, the message will hold and will not go away.
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