Chevrolet VENTURE 2005 Owner's Manual page 23

If the power sliding door(s) is open or in the process of
closing when you shift out of PARK (P), a buzzer
will sound. This is a warning that the sliding door(s) is
not completely closed.
If the power to the sliding door(s) is turned off, the
buzzer will not sound indicating the door(s) is not
completely closed.
CAUTION:
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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.
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