2006 Pontiac Montana SV6 Owner's Manual - Page 104

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. If an object obstructs the power sliding door(s) while it is closing, the door will automatically reverse to the open position, provided it meets sufficient resistance. Resistance must be as strong as the force of the closing door, or stronger. The force of the closing door increases significantly as the door approaches the latched position. 2-20