light CADILLAC XT4 2019 Service Manual

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
134 INSTRUMENTS AND CONTROLS
If the light is f lashing :A
malfunction has been detected that
could damage the emission control
system and increase vehicle
emissions. Diagnosis and service may
be required.
To help prevent damage, reduce
vehicle speed and avoid hard
accelerations and uphill grades.
If towing a trailer, reduce the amount
of cargo being hauled as soon as
possible.
If the light continues to flash, find a
safe place to park. Turn the vehicle off
and wait at least 10 seconds before
restarting the engine. If the light is
still flashing, follow the previous
guidelines and see your dealer for
service as soon as possible.
If the light is on steady : A
malfunction has been detected.
Diagnosis and service may be
required.
Check the following:
. If fuel has been added to the
vehicle using the capless fuel
funnel adapter, make sure that it
has been removed. See “Filling theTank with a Portable Gas Can
”
under Filling the Tank 0238. The
diagnostic system can detect if the
adapter has been left installed in
the vehicle, allowing fuel to
evaporate into the atmosphere.
A few driving trips with the
adapter removed may turn off the
light.
. Poor fuel quality can cause
inefficient engine operation and
poor driveability, which may go
away once the engine is warmed
up. If this occurs, change the fuel
brand. It may require at least one
full tank of the proper fuel to turn
the light off. See Recommended
Fuel 0237.
If the light remains on, see your
dealer.
Emissions Inspection and
Maintenance Programs
If the vehicle requires an Emissions
Inspection/Maintenance test, the test
equipment will likely connect to the
vehicle's Data Link Connector (DLC).
The DLC is under the instrument
panel to the left of the steering wheel.
Connecting devices that are not used
to perform an Emissions Inspection/
Maintenance test or to service the
vehicle may affect vehicle operation.
See Add-On Electrical Equipment 0250.
See your dealer if assistance is needed.
The vehicle may not pass
inspection if:
. The light is on when the engine is
running.
. The light does not come on when
the ignition is in Service Mode.
. Critical emission control systems
have not been completely
diagnosed. If this happens, the
vehicle would not be ready for
inspection and might require
several days of routine driving
before the system is ready for
inspection. This can happen if the

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
INSTRUMENTS AND CONTROLS 135
12-volt battery has recently been
replaced or run down, or if the
vehicle has been recently serviced.
See your dealer if the vehicle will not
pass or cannot be made ready for
the test.
Brake System Warning
Light
The vehicle brake system consists of
electronically controlled hydraulic
brake circuits. If a fault is detected,
valves are adjusted to allow the brake
pedal to push brake fluid directly into
the hydraulic brake circuits. When a
fault occurs, the brake system warning
light comes on, and Driver
Information Center (DIC) messages
may display. Vehicle speed may also
be limited and the amount of brake
pedal force applied may need to
increase. Have the vehicle brake
system serviced as soon as possible.
MetricEnglish
This light should come on briefly
when the engine is started. If it does
not come on then, have it fixed so it
will be ready to warn if there is a
problem.
The brake system warning light may
also come on when the parking brake
is set, if the vehicle has low brake
fluid, or if the brakes are severely
faded. See Brake Fluid 0268. If the
brakes are overheated, DIC messages
may display, and the vehicle speed
may be limited. If the brake fluid is
not low, if the brakes are not
overheated, and if the parking brake is
fully released, then the vehicle has a
brake problem. Have the vehicle brake
system serviced as soon as possible. If the light comes on while driving,
pull off the road and stop carefully.
The pedal might be harder to push,
or the pedal may go closer to the
floor. It could take longer to stop.
If the light is still on, have the vehicle
towed for service. See
Towing the
Vehicle 0312.
{Warning
The brake system might not be
working properly if the brake
system warning light is on. Driving
with the brake system warning light
on can lead to a crash. If the light is
still on after the vehicle has been
pulled off the road and carefully
stopped, have the vehicle towed for
service.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
136 INSTRUMENTS AND CONTROLS
Electric Parking Brake
Light
MetricEnglish
This light comes on when the parking
brake is applied. If the light continues
flashing after the parking brake is
released, or while driving, there is a
problem with the Electric Parking
Brake system. A message may also
display in the Driver Information
Center (DIC).
If the light does not come on,
or remains flashing, see your dealer.
Service Electric Parking
Brake Light
On some vehicles the service electric
parking brake light should come on
briefly when the vehicle is started.
If it does not come on, have it fixed so
it will be ready to warn if there is a
problem. For vehicles with the
reconfigurable cluster, this light may
not come on when the vehicle is
started.
If this light stays on, the vehicle
should be taken to a dealer as soon as
possible. See Electric Parking Brake
0 201. A message may also display in
the Driver Information Center (DIC).
Antilock Brake System
(ABS) Warning Light
This light comes on briefly when the
engine is started.
If the light does not come on, have it
fixed so it will be ready to warn if
there is a problem.
If the light comes on while driving,
stop as soon as it is safely possible
and turn off the vehicle. Then start
the engine again to reset the system.
If the ABS light stays on, or comes on
again while driving, the vehicle needs
service. A chime may also sound when
the light comes on steady.
If the ABS light is the only light on,
the vehicle has regular brakes, but the
antilock brakes are not functioning.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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INSTRUMENTS AND CONTROLS 137
If both the ABS and the brake system
warning light are on, the vehicle's
antilock brakes are not functioning
and there is a problem with the
regular brakes. See your dealer for
service.
SeeBrake System Warning Light 0135.
All-Wheel-Drive Light
All-Wheel-Drive
LightFront-Wheel-Drive Light
If equipped, the corresponding light
comes on when an All-Wheel Drive
(AWD) mode or Front-Wheel-Drive
mode is selected. See Driver Mode
Control 0205.
If the light turns amber, there may be
a malfunction. See your dealer.
Lane Keep Assist (LKA)
Light
If equipped, this light is green if LKA
is available to assist.
LKA may assist by gently turning the
steering wheel if the vehicle
approaches a detected lane marking
without using the turn signal in that
direction. The LKA light will turn
amber.
This light is amber and flashes as a
Lane Departure Warning (LDW) alert,
to indicate that the lane marking has
been crossed.
See Lane Keep Assist (LKA) 0234.
Vehicle Ahead Indicator
If equipped, this indicator will display
green when a vehicle is detected
ahead and amber when you are
following a vehicle ahead much too
closely.
See Forward Collision Alert (FCA)
System 0226.
Pedestrian Ahead Indicator
If equipped, this indicator will display
amber when a nearby pedestrian is
detected directly in front of the
vehicle.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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138 INSTRUMENTS AND CONTROLS
SeeFront Pedestrian Braking (FPB)
System 0230.
Traction Off Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your
dealer. If the system is working
normally, the indicator light then
turns off.
The traction off light comes on when
the Traction Control System (TCS) has
been turned off by pressing and
releasing the TCS/StabiliTrak/
Electronic Stability Control (ESC)
button.
This light and the StabiliTrak OFF
light come on when StabiliTrak/ESC is
turned off. If the TCS is off, wheel speed will be
limited when necessary to protect the
driveline from damage. Adjust driving
accordingly.
See
Traction Control/Electronic Stability
Control 0203.
StabiliTrak OFF Light
This light comes on briefly while
starting the engine. If it does not,
have the vehicle serviced by your
dealer.
This light comes on when the
StabiliTrak/Electronic Stability Control
(ESC) system is turned off.
If StabiliTrak/ESC is off, the Traction
Control System (TCS) is also off. If StabiliTrak/ESC and TCS are off, the
system does not assist in controlling
the vehicle. Turn on the TCS and the
StabiliTrak/ESC systems, and the
warning light turns off.
See
Traction Control/Electronic Stability
Control 0203.
Traction Control System
(TCS)/StabiliTrak Light
This light comes on briefly when the
engine is started.
If the light does not come on, have
the vehicle serviced by your dealer.
If the system is working normally, the
indicator light turns off.
If the light is on and not flashing, the
TCS and potentially the StabiliTrak/
ESC system have been disabled.
A Driver Information Center (DIC)
message may display. Check the DIC

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
INSTRUMENTS AND CONTROLS 139
messages to determine which
feature(s) is no longer functioning and
whether the vehicle requires service.
If the light is on and flashing, the TCS
and/or the StabiliTrak/ESC system is
actively working.
SeeTraction Control/Electronic Stability
Control 0203.
Engine Coolant
Temperature Warning Light
This light comes on briefly while
starting the vehicle.
If it does not, have the vehicle
serviced by your dealer. If the system
is working normally the indicator light
goes off.
Caution
The engine coolant temperature
warning light indicates that the
vehicle has overheated. Driving with
this light on can damage the engine
and it may not be covered by the
vehicle warranty. See Engine
Overheating 0265.
The engine coolant temperature
warning light comes on when the
engine has overheated.
If this happens, pull over and turn off
the engine as soon as possible. See
Engine Overheating 0265.
Driver Mode Control Light
This light comes on when Sport Mode
is selected.
This light comes on when Snow/Ice
Mode is selected.
See Driver Mode Control 0205.
Tire Pressure Light
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the engine is
started. It provides information about
tire pressures and the TPMS.
When the Light Is On Steady
This indicates that one or more of the
tires are significantly underinflated.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
12017481) - 2019 - CRC - 11/5/18
140 INSTRUMENTS AND CONTROLS
A Driver Information Center (DIC) tire
pressure message may also display.
Stop as soon as possible, and inflate
the tires to the pressure value shown
on the Tire and Loading Information
label. SeeTire Pressure 0288.
When the Light Flashes First and
Then Is On Steady
If the light flashes for about a minute
and then stays on, there may be a
problem with the TPMS. If the
problem is not corrected, the light will
come on at every ignition cycle. See
Tire Pressure Monitor Operation 0291.
Engine Oil Pressure Light
Caution
Lack of proper engine oil
maintenance can damage the
engine. Driving with the engine oil
low can also damage the engine.
The repairs would not be covered
by the vehicle warranty. Check the
oil level as soon as possible. Add oil
if required, but if the oil level is
(Continued)
Caution (Continued)
within the operating range and the
oil pressure is still low, have the
vehicle serviced. Always follow the
maintenance schedule for changing
engine oil.
This light should come on briefly as
the engine is started. If it does not
come on, have the vehicle serviced by
your dealer.
If the light comes on and stays on, it
means that oil is not flowing through
the engine properly. The vehicle could
be low on oil and might have some
other system problem. See your dealer.
Low Fuel Warning Light
This light is near the fuel gauge and
comes on briefly when the ignition is
turned on as a check to show it is
working.
It also comes on when the fuel tank is
low on fuel. The light turns off when
fuel is added. If it does not, have the
vehicle serviced.
Security Light
The security light should come on
briefly as the engine is started. If it
does not come on, have the vehicle

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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INSTRUMENTS AND CONTROLS 141
serviced by your dealer. If the system
is working normally, the indicator
light turns off.
If the light stays on and the engine
does not start, there could be a
problem with the theft-deterrent
system. SeeImmobilizer Operation
0 51.
High-Beam On Light
This light comes on when the
high-beam headlamps are in use. See
Headlamp High/Low-Beam Changer
0160.
IntelliBeam Light
This light comes on when the
IntelliBeam system, if equipped, is
enabled. See Exterior Lamp Controls
0 158.
Lamps On Reminder
This light comes on when the exterior
lamps are in use. See Exterior Lamp
Controls 0158.
Cruise Control Light
The cruise control light is white when
the cruise control is on and ready, and
turns green when the cruise control is
set and active. See Cruise Control
0 206.
Adaptive Cruise Control Light
This light comes on when Adaptive
Cruise Control (if equipped) is active.
See Adaptive Cruise Control 0209.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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142 INSTRUMENTS AND CONTROLS
Door Ajar Light
For vehicles equipped with this light,
it comes on when a door is open or
not securely latched. Before driving,
check that all doors are properly
closed.
Information Displays
Driver Information
Center (DIC)
The DIC is displayed in the
instrument cluster. It shows the status
of many vehicle systems.
SorT:Press to move between the
interactive display zones in the
cluster. Press
Sto go back to the
previous menu.
yorz: Use the thumbwheel to
scroll to the previous or next
selection.
V: Press the thumbwheel to open a
menu or select a menu item. Press
and hold to reset values on certain
screens.
Info Page Options
The info displays on the DIC can be
turned on or off through the
Options menu.
1. Press
Tto scroll to the Options
menu. Use the thumbwheel to
scroll to Info Pages and press the
thumbwheel to select.
2. Scroll
yorzto move through
the list of possible info displays.
3. Press the thumbwheel while an item is highlighted to select or
deselect that item.
The info pages can also be turned on
or off through the DIC page Info Page
Options.

Cadillac XT4 Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
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146 INSTRUMENTS AND CONTROLS
$:Press or lift to center the HUD
image. The HUD image can only be
adjusted up and down, not side
to side.
!: Press to select the display view.
Each press will change the
display view.
D: Lift and hold to brighten the
display. Press and hold to dim the
display. Continue to hold to turn the
display off.
The HUD image will automatically
dim and brighten to compensate for
outside lighting. The HUD brightness
control can also be adjusted as
needed.
The HUD image can temporarily light
up depending on the angle and
position of sunlight on the HUD
display. This is normal.
Polarized sunglasses could make the
HUD image harder to see. Head-Up Display (HUD) Rotation
Option
This feature allows the angle of the
HUD image to be adjusted.
Press the thumbwheel while Adjust
Rotation is highlighted to enter Adjust
Mode. Scroll to adjust the angle of the
HUD display. Press the thumbwheel to
confirm and save the setting. This
feature may only be available in
P (Park). See
Instrument Cluster 0126.
HUD Views
There are four views in the HUD.
Some vehicle information and vehicle
messages or alerts may be displayed
in any view.
Metric
English
Speed View : This displays digital
speed in English or metric units,
speed limit, and indicators such as
vehicle ahead, Lane Departure
Warning/Lane Keep Assist, and
Adaptive Cruise Control and set speed.
Some information only appears on
vehicles that have these features, and
when they are active.
The speed limit sign can be disabled
in the HUD settings under Options in
the Cluster Menu. See Instrument
Cluster 0126.
Metric