GMC 2010 Acadia Owner's Manual page 158

5-34 Instruments and Controls
To adjust the HUD image so that
items are properly displayed, do the
following:
1. Adjust the driver's seat to a
comfortable position.
2. Start the engine.
3. Adjust the HUD controls.
Use the following settings to adjust
the HUD.
(Off): To turn HUD off, rotate the
dimming knob fully counterclockwise
until the HUD display turns off.
Brightness: Turn the knob on
the HUD control clockwise or
counterclockwise to brighten or dim
the display.
(Up): (Down): Press the up or
down arrows to center the HUD
image in your view. The HUD image
can only be adjusted up and down,
not side to side.
(Page): Press this button to
select the display formats. Release
the page button when the format
number with the desired display is
shown on the HUD.
The three formats are as follows:
Format One: This display gives the
speedometer reading (in English or
metric units), turn signal indication,
high beam indication, transmission
positions, and the outside air
temperature.
Format Two: This display includes
the information in Format One
without the transmission information
and the outside air temperature.