So it is a button that's present in the Yukon Denali and Escalade?
It's definitely not in the Chevrolet LZT or GMC SLT trim levels.
From the looks of the interior the Chevrolet LZT is "closest" to the Denali trim, considering it has the covers for the front cup holders and cubby that the rest of the trims do not.
i have a '15 LTZ burb & have the motion sensor button
DIC msg when pressed, if button lights up, sensor is off
fyi, Onstar can only tell you the alarm went off... they cant tell you which specific sensor triggered alarm.
as i found out in the past.