2007 GMC ACADIA transmission

The HUD control is
located to the right of
the steering wheel.
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.
9(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 to brighten the display and
counterclockwise to dim it.
w(Up):x(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.
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Format Two:This display includes the information
in Format One without the transmission information
and the outside air temperature.
Format Three:This display includes all the
information in Format One along with a circular
tachometer, but without outside air temperature.
All formats will show the turn-by-turn navigation
information and provide details about the next
driving maneuver to be made. When you near your
destination, the HUD will display a distance bar
that will ll in the closer you get to your destination.All navigation information is provided to the HUD
by the navigation radio, if the vehicle has one.
The HUD image displayed on the windshield will
automatically dim and brighten to compensate
for outside lighting.
The HUD image can temporarily light up
depending on the angle and position of the
sunlight on the HUD display. This is normal and
will change when the angle of the sunlight on
the HUD display changes.
Polarized sunglasses could make the HUD image
harder to see.
Care of the HUD
Clean the inside of the windshield as needed to
remove any dirt or lm that could reduce the
sharpness or clarity of the HUD image.
To clean the HUD lens, use a soft, clean cloth
that has household glass cleaner sprayed
on it. Wipe the HUD lens gently, then dry it.
Do not spray cleaner directly on the lens
because the cleaner could leak into the unit.
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Malfunction Indicator Lamp
Check Engine Light
Your vehicle has a
computer which
monitors operation
of the fuel, ignition,
and emission control
systems.
This system is called OBD II (On-Board
Diagnostics-Second Generation) and is intended
to make sure that emissions are at acceptable
levels for the life of the vehicle, helping to produce
a cleaner environment. The check engine light
comes on to indicate that there is a problem and
service is required. Malfunctions often will be
indicated by the system before any problem is
apparent. This can prevent more serious damage
to your vehicle. This system is also designed
to assist your service technician in correctly
diagnosing any malfunction.Notice:If you keep driving your vehicle with
this light on, after awhile, the emission controls
might not work as well, your vehicle’s fuel
economy might not be as good, and the engine
might not run as smoothly. This could lead
to costly repairs that might not be covered
by your warranty.
Notice:Modications made to the engine,
transmission, exhaust, intake, or fuel system
of your vehicle or the replacement of the
original tires with other than those of the same
Tire Performance Criteria (TPC) can affect
your vehicle’s emission controls and can cause
this light to come on. Modications to these
systems could lead to costly repairs not
covered by your warranty. This could also
result in a failure to pass a required Emission
Inspection/Maintenance test. SeeAccessories
and Modifications on page 385.
226

Driver Information Center (DIC)
Your vehicle has a Driver Information Center (DIC).
The DIC displays information about your vehicle.
It also displays warning messages if a system
problem is detected.
All messages will appear in the DIC display
located at the top of the instrument panel cluster.
The DIC comes on when the ignition is on.
After a short delay, the DIC will display the
information that was last displayed before the
engine was turned off.
The DIC also displays a shift lever position
indicator on the bottom line of the display. See
Automatic Transmission Operation on page 129
for more information.The outside air temperature also displays on the
DIC when viewing the trip and fuel information.
The outside air temperature automatically
appears in the top right corner of the DIC display.
If there is a problem with the system that
controls the temperature display, the numbers
will be replaced with dashes. If this occurs,
have the vehicle serviced.
If your vehicle has DIC buttons, see “DIC Operation
and Displays (With DIC Buttons)” later in this
section andDIC Vehicle Customization (With DIC
Buttons) on page 255for the displays available.
If your vehicle does not have DIC buttons, see
“DIC Operation and Displays (Without DIC
Buttons)” later in this section for the displays
available.
232

SERVICE TRANSMISSION
This message displays when there is a problem
with the transmission. See your dealer/retailer
for service.
SERVICE VEHICLE SOON
This message displays when a non-emissions
related malfunction occurs. Have the vehicle
serviced by your dealer/retailer as soon as
possible.
SPEED LIMITED TO XXX MPH (KM/H)
This message displays when your vehicle speed
is limited to 80 mph (128 km/h) because the
vehicle detects a problem in the speed variable
assist steering system. Have your vehicle serviced
by your dealer/retailer.
STARTING DISABLED SERVICE
THROTTLE
This message displays when your vehicle’s throttle
system is not functioning properly. Have your
vehicle serviced by your dealer/retailer.
THEFT ATTEMPTED
This message displays if the content theft-deterrent
system has detected a break-in attempt while
you were away from your vehicle. SeeContent
Theft-Deterrent on page 118for more information.
TIGHTEN GAS CAP
This message may display along with the check
engine light on the instrument panel cluster if
the vehicle’s fuel cap is not tightened properly.
SeeMalfunction Indicator Lamp on page 226.
Reinstall the fuel cap fully. SeeFilling the Tank
on page 390. The diagnostic system can determine
if the fuel cap has been left off or improperly
installed. A loose or missing fuel cap allows fuel
to evaporate into the atmosphere. A few driving
trips with the cap properly installed should turn
this light and message off.
253

TIRE LEARNING ACTIVE
This message displays when the Tire Pressure
Monitor (TPM) system is re-learning the tire
positions on your vehicle. SeeDIC Operation and
Displays (With DIC Buttons) on page 233orDIC
Operation and Displays (Without DIC Buttons) on
page 239for more information. The tire positions
must be re-learned after rotating the tires or after
replacing a tire or sensor. SeeTire Inspection and
Rotation on page 448,Tire Pressure Monitor
System on page 444, andInflation - Tire Pressure
on page 442for more information.
TRACTION CONTROL OFF
This message displays when the Traction Control
System (TCS) is turned off. Adjust your driving
accordingly. SeeStabiliTrak
®System on page 337
for more information. This message clears itself
after 10 seconds.
TRANSMISSION HOT IDLE ENGINE
Notice:If you drive your vehicle while the
transmission uid is overheating and the
transmission temperature warning is displayed
on the instrument panel cluster and/or DIC, you
can damage the transmission. This could lead
to costly repairs that would not be covered by
your warranty. Do not drive your vehicle with
overheated transmission uid or while the
transmission temperature warning is displayed.
This message displays along with a continuous
chime if the transmission uid in the vehicle
gets hot. Driving with the transmission uid
temperature high can cause damage to the
vehicle. Stop the vehicle and let it idle to allow
the transmission to cool. This message clears
and the chime stops when the uid temperature
reaches a safe level.
254

The traction control system may activate on
dry or rough roads or under conditions such as
heavy acceleration while turning or abrupt
upshifts/downshifts of the transmission.
When this happens, you may notice a reduction
in acceleration, or may hear a noise or vibration.
This is normal.
If your vehicle is in cruise control when the system
activates, the StabiliTrak
®light will ash and the
cruise control will automatically disengage.
When road conditions allow you to use cruise
again, you may re-engage the cruise control.
SeeCruise Control on page 180.
StabiliTrak
®may also turn off automatically if it
determines that a problem exists with the system.
If the problem does not clear itself after restarting
the vehicle, you should see your dealer/retailer
for service.
All-Wheel Drive (AWD) System
If your vehicle has this feature, engine power is
sent to all four wheels when extra traction is
needed. This is like four-wheel drive, but there
is no separate lever or switch to engage or
disengage the front axle. It is fully automatic, and
adjusts itself as needed for road conditions.
When using a compact spare tire on your AWD
equipped vehicle, the AWD system automatically
detects the presence of the compact spare
and the AWD is disabled. To restore the AWD
operation and prevent excessive wear on
the clutch in your AWD system, replace the
compact spare with a full-size tire as soon as
possible. SeeCompact Spare Tire on page 477
for more information.
339

Hill and Mountain Roads
Driving on steep hills or mountains is different
from driving in at or rolling terrain.If you drive regularly in steep country, or if you are
planning to visit there, here are some tips that
can make your trips safer and more enjoyable.
Keep your vehicle in good shape. Check
all uid levels and also the brakes, tires,
cooling system, and transmission. These parts
can work hard on mountain roads.
{CAUTION:
If you do not shift down, the brakes could
get so hot that they would not work well.
You would then have poor braking or
even none going down a hill. You could
crash. Shift down to let the engine assist
the brakes on a steep downhill slope.
354