Pontiac Vibe 2003 Owner's Manual page 111

Reading Lamp (If Equipped)
If you have a sunroof, you will have a reading lamp near
the sunroof switch. Press the button to turn the lamp on
and press it again to turn it off.
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Mirrors
Inside Day/Night Rearview Mirror with
Reading Lamps
The inside rearview mirror is attached to your vehicle's
front windshield glass. If you do not have a sunroof,
your vehicle's inside rearview mirror may be equipped
with reading lamps. If your vehicle is equipped with
this mirror, there are two buttons located on the bottom
of the mirror. Press the buttons to turn the lamps on
and press them again to turn the lamps off. Be sure to
turn off the reading lamps to avoid draining your
vehicle's battery.