Pontiac 1996 Grand Prix Owner's Manual page 128

When you sit straight in your seat, the HUD image will
appear straight ahead near the front bumper.
When the ignition key is turned to RUN, all possible
HUD images will come on. Then the Head-Up Display
will operate normally.
NOTICE:
,
Although the HUD'image appears to be near the
front of the vehicle, do not use it as a parking aid.
The HUD was not designed for that purpose. If you
try to use it that way, such as i n a parking lot, you
may misjudge distance and run into something.
To
adjust the HUD
so
you can see it properly:
1.
2.
3.
4.
Start your engine and turn the HUD dial all the way up.
When the headlamps are off, the HUD image will
0
When the headlamps are on, the HUD image
Adjust your seat, if necessary, to a
comfortable position.
Press the top of the IMAGE switch until the HUD
image stops moving. Then press the bottom of the
switch until the image is as low as possible, but in
full view.
Turn the HUD dial down until the HUD image is no
brighter than necessary. To turn the HUD off, turn
the HUD dial all the way down.
be at a preset daytime brightness.
brightness is controlled by the dimmer control.
If the sun comes out, it becomes cloudy, or if you turn
on your headlamps, you may need to adjust the HUD
brightness again. Polarizing sunglasses could make the
HUD image harder to see.