Buick 2007 Terraza Owner's Manual page 110

Sliding Door Lock
110
CAUTION:
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If your vehicle is facing downward on a
steep grade (15 percent or more), the door
may not stay open and could slam shut,
possibly injuring someone. To make sure
the door does not slam shut be sure to
hold it open until everyone is clear of the
door, and only then allow it to slowly close.