GMC 2001 Safari Owner's Manual page 82

Power Windows (Option)
If you have power windows, the controls are located on
each of the front doors. The driver's door also has a
switch for the front passenger window. Your power
windows will not work unless the ignition is in RUN or
ACCESSORY, or unless retained accessory power is
active. See "Retained Accessory Power" in the Index.
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Express Down Window
The driver's window switch also has an express
feature that allows you to lower the window without
holding the switch. Press the driver's window switch
marked AUTO briefly to activate the express
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feature. The express down feature can be interrupted at
any time by pressing the up arrow end of the switch.
Lightly tap the switch to open the window slightly.
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down
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down
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