Chevrolet 2004 Venture Owner's Manual page 128

The power sliding door override switch(es) will also stop
the door(s) immediately, while the door(s) is opening
or closing, when the override switch(es) is turned on.
The power sliding door(s) will only open if the transaxle
is in PARK (P). The transaxle does not have to be in
PARK (P) to close the door(s).
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.
2-18
This switch is in front of the
driver's or the passenger's
side sliding 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.