1997 GMC Suburban Owner's Manual - Page 79

c Y . n On the passenger sideof the rear cargodoor or tailgate, there is apower lock switch which can be used to lock or unlock all of the doors. Child Security Locks With this feature, you can lock the rear side doorsso they can't be opened from the inside by passengers. LOCK On vehicles with cargo doors,if the rear cargo lock switch is pressed with the cargo doors open,all of the doors will lock five seconds after cargo doors are the closed. If the cargo doors are closed, the vehicle doors will lock when a power door lock switch is pressed. Move the button up to engage the security feature. Move the button down to return the door locks to normal operation. Leaving Your Vehicle If you are leaving the vehicle, takeyour keys, open your door and set the locks from inside. Then get out, and close thedoor. 2-5