Buick 2005 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.
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