GMC 1994 Yukon Owner's Manual page 105

Dome Lights
The dome lights will come on when you open the doors or tailgate. YOU can
also turn the dome lights on by turning the interior light dimmer dial all they
way up until it clicks.
You can use the dome
lamp switch, located
below the headlight
switch, to set the
dome lamps to come
on automatically or
remain off.
To turn the lights off, just press the side of the switch marked
OFF.
To
return the lights to automatic operation, press the side marked
AUTO.
Reading Lights
If your vehicle has
reading lights, press
the bar next to the
light to turn the light
on. Press the bar again
to turn the light off.
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