GMC 2007 Savana - Manual (Page 115)

To open the rear doors from the outside, pull the
handle toward you to open the passenger side
rear door first. To open the driver side rear door, pull the latch
release at the inside edge of the door.
To close the rear doors, close the driver side rear
door first. Then, close the passenger side rear
door. Check to make sure both doors are
completely closed.
115