2005 GMC Savana Van Owner's Manual - Page 90

Move the button up to engage the security feature. Move the button down to return the door locks to normal operation. Sliding Side Door Side Sliding Door Lockout Protection This feature protects you from locking your key in the vehicle when the key is in the ignition and a door is open. If the power lock switch is pressed when either the driver's, passenger's, or rear door is open, all the doors will lock and then the driver's door will unlock. This feature does not include the side cargo door. To open the sliding side door from outside, pull the handle toward the rear of the vehicle. Then, slide the door open. 2-10