Chevrolet 2005 Uplander Owner's Manual page 116

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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