2007 Buick Terraza Owner's Manual - Page 116

If the power sliding door(s) is open or in the process of closing when you shift out of PARK (P), a chime will sound. This is a warning that the sliding door(s) is not completely closed. Also, the Driver Information Center (DIC) will indicate if the door is open. See DIC Warnings and Messages on page 230. Stop the vehicle and close the door. {CAUTION: If you shift the transaxle out of PARK (P) and accelerate before the power sliding door latches closed, the door may reverse to the open position. A child or others could fall out of the vehicle and be injured. Always make sure the power sliding door is closed and latched before you drive away. 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. 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. 116