2005 Buick Terraza Owner's Manual - Page 94

The driver's side sliding door is designed to open only a little if the fuel door is open. If this ever happens, do not try to force the sliding door. When the fuel filler door is closed, the driver's side sliding door can be opened normally. {CAUTION: You or others could be injured if caught in the path of the sliding door. Make sure the door path is clear before closing the door. 2-20