GMC 2007 Savana - Manual (Page 113)

To open the rear portion of a 60/40 door from the
outside, pull the handle on the side of the rear
door and pull the door toward you.
To close the 60/40 side doors, close the rear door
first. Then close the front door. Check to make
sure that both doors are completely closed.
The front side swing-out door has a check strap
assembly in the door frame to keep the door from
opening beyond 90 degrees.
To open the door beyond 90 degrees, close the
door partially, pull the check strap toward you and
then open the door. When you close the door,
the check strap will automatically re-engage.
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