Pontiac 1998 Grand Prix Owner's Manual page 158

Push the ENGMET button
on the trip calculator to
switch the HUD speed
display from English to
metric or metric to English.
If you don't have the trip
1
calculator, you can't change
the display.
Care of the Head-Up Display
I -
Clean the inside
of
the windshield
as
needed to remove
any dirt or film that reduces the sharpness or clarity of
the HUD image.
To clean the HUD, 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 could leak into the unit.
2-83