2010 Chevrolet Malibu Owner's Manual - Page 119

Rear Door Security Locks The vehicle has rear door security locks to prevent passengers from opening the rear doors from the inside. Open the rear doors to access the security locks on the inside edge of each door. Lockout Protection If you press the power door lock switch when the key is in the ignition and any door is open, all the doors will lock and then the driver's door will unlock. Be sure to remove the key from the ignition when locking your vehicle. If the remote keyless entry transmitter is used to lock the doors while the key is in the ignition, a chime will sound three times. All doors will then lock. To set the locks, insert a key into the slot and turn it to the horizontal position. The door can only be opened from the outside with the door unlocked. To return the door to normal operation, turn the slot to the vertical position. 3-11