Chevrolet SUBURBAN 1993 Owner's Manual page 112

Reading Lights
I
K2252
If you have reading lights, press the bar next to the light to turn the light on.
Press the bar again
to turn the light off.
K2161
If your vehicle has an overhead console with reading lights, they can be
swiveled to point in the direction you want. To turn the light on, press the
button next to the light with the master lighting symbol on it. Press the button
again to turn the light off.
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