GMC 2001 Sonoma Owner's Manual page 76

Sliding Rear Window (If Equipped)
Squeeze the latch in the center of the window and slide
the glass to open it.
When you close the window, be sure the latch
is engaged.
Keys
CAUTION:
Leaving children in a vehicle with the ignition
key is dangerous for many reasons. A child or
others could be badly injured or even killed.
They could operate the power windows or
other controls or even make the vehicle move.
Don't leave the keys in a vehicle with children.
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