Pontiac 2000 Bonneville Owner's Manual page 145

The HUD controls are located to the left of the
steering column.
1. Start your engine and turn the HUD dimmer all of
the way clockwise.
The brightness of the HUD image is determined by
ambient light, and where you have set the HUD
dimmer control.
2. Adjust the seat, if necessary, before setting the
height control.
Press and hold the top of the IMAGE (image height)
control, raising the HUD image as far as possible.
Then press on the bottom of the HUD image height
control to move the image down, so the image is as
low as possible, but in full view.
3. Turn the dimmer control counterclockwise until the
HUD image is no brighter than necessary. To turn the
HUD off, rotate the HUD dimmer control all the
way counterclockwise.
If the sun comes out, or it becomes cloudy, or if you turn
on your headlamps, you may need to adjust the HUD
brightness using the HUD dimmer control. Polarized
sunglasses could make the HUD image harder to see.
Clean the inside of the windshield as needed to remove
any dirt or film that reduces the sharpness or clarity of
the HUD image.
Spray household glass cleaner on a soft, clean cloth.
Wipe the HUD lens gently, then dry it. Do not spray
cleaner directly on the lens, because the cleaner fluid
could leak inside the unit.
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