2021 CADILLAC XT6 low oil pressure

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
KEYS, DOORS, AND WINDOWS 15
2. Immediately press and hold/for
at least four seconds or until the
turn signal lamps flash. The turn
signal lamps flashing confirms the
request to remote start the vehicle
has been received.
During the remote start the doors
will be locked and the parking
lamps will remain on as long as the
engine is running.
The engine will shut off after
15 minutes unless a time extension
is done or the ignition is turned on.
3. With the RKE transmitter in the vehicle, press the brake pedal and
start the vehicle to drive.
Extending Engine Run Time
The engine run time can also be
extended by another 15 minutes,
if during the first 15 minutes
Steps 1 and 2 are repeated while the
engine is still running. An extension
can be requested 30 seconds after
starting. This provides a total of
30 minutes.
The remote start can only be
extended once. When the remote start is extended,
the second 15-minute period is added
on to the first 15 minutes for a total
of 30 minutes.
A maximum of two remote starts, or a
remote start with an extension, are
allowed between ignition cycles.
The ignition must be turned on and
then off before the remote start
procedure can be used again.
Canceling a Remote Start
To cancel a remote start, do any of
the following:
.Press and hold/until the parking
lamps turn off.
.Turn on the hazard warning
flashers.
.Turn the vehicle on and then off.
Conditions in Which Remote Start
Will Not Work
The remote start will not operate if
any of the following occur:
.The RKE transmitter is in the
vehicle.
.The ignition is on.
.The hood is not closed.
.The hazard warning flashers are on.
.There is an emission control system
malfunction.
.The engine coolant temperature is
too high.
.The oil pressure is low.
.Two remote vehicle starts or a start
with an extension have already
been used.
.The vehicle is not in P (Park).
Door Locks
{Warning
Unlocked doors can be dangerous.
.Passengers, especially children,
can easily open the doors and
fall out of a moving vehicle. The
doors can be unlocked and
opened while the vehicle is
moving. The chance of being
thrown out of the vehicle in a
crash is increased if the doors are
not locked. So, all passengers
should wear seat belts properly
and the doors should be locked
whenever the vehicle is driven. (Continued)

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
100 INSTRUMENTS AND CONTROLS
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . . . 101
Steering Wheel Controls . . . . . . . . . 101
Heated Steering Wheel . . . . . . . . . . 101
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Windshield Wiper/Washer . . . . . . . 102
Rear Window Wiper/Washer . . . . 104
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Power Outlets . . . . . . . . . . . . . . . . . . . . . 105
Wireless Charging . . . . . . . . . . . . . . . . 106
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . . . . 108
Instrument Cluster . . . . . . . . . . . . . . . 109
Speedometer . . . . . . . . . . . . . . . . . . . . . . 112
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . 112
Trip Odometer . . . . . . . . . . . . . . . . . . . . 112
Tachometer . . . . . . . . . . . . . . . . . . . . . . . 112
Fuel Gauge . . . . . . . . . . . . . . . . . . . . . . . . 112
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Seat Belt Reminders . . . . . . . . . . . . . . 113
Airbag Readiness Light . . . . . . . . . . 114 Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . . . . . 114
Charging System Light . . . . . . . . . . . 115
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . . . 115
Brake System Warning Light . . . . 117
Electric Parking Brake Light . . . . . 117
Service Electric Parking Brake Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . . . 118
Performance Shifting Light . . . . . . 119
All-Wheel-Drive Light . . . . . . . . . . . . 119
Lane Keep Assist (LKA) Light . . . 119
Vehicle Ahead Indicator . . . . . . . . . 119
Pedestrian Ahead Indicator . . . . . . 120
Traction Off Light . . . . . . . . . . . . . . . . 120
StabiliTrak OFF Light . . . . . . . . . . . . 120
Traction Control System (TCS)/ StabiliTrak Light . . . . . . . . . . . . . . . . 120
Engine Coolant Temperature Warning Light
(Uplevel Only) . . . . . . . . . . . . . . . . . . . 121
Driver Mode Control Light . . . . . . . 121
Tire Pressure Light . . . . . . . . . . . . . . . 121
Engine Oil Pressure Light . . . . . . . . 122
Low Fuel Warning Light . . . . . . . . . 122
Security Light . . . . . . . . . . . . . . . . . . . . . 123
High-Beam On Light . . . . . . . . . . . . . 123
Lamps On Reminder . . . . . . . . . . . . . 123 Cruise Control Light . . . . . . . . . . . . . . 123
Door Ajar Light . . . . . . . . . . . . . . . . . . . 124
Information Displays
Driver Information
Center (DIC) . . . . . . . . . . . . . . . . . . . . . 124
Head-Up Display (HUD) . . . . . . . . . 126
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . . . . . 129
Engine Power Messages . . . . . . . . . . 130
Vehicle Speed Messages . . . . . . . . . 130
Vehicle Personalization
Vehicle Personalization . . . . . . . . . . 130
Universal Remote System
Universal Remote System . . . . . . . . 135
Universal Remote System Programming . . . . . . . . . . . . . . . . . . . 135
Universal Remote System Operation . . . . . . . . . . . . . . . . . . . . . . . . 137

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
122 INSTRUMENTS AND CONTROLS
For vehicles with the Tire Pressure
Monitor System (TPMS), this light
comes on briefly when the vehicle 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.
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 0343.
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 0347.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
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
A Low Fuel Warning Light near the
fuel gauge comes on briefly when the
ignition is turned on as a check to
show it is working.
It also comes on when the fuel gauge
indicator nears empty. The light turns
off when fuel is added. If it does not,
have the vehicle serviced.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
INSTRUMENTS AND CONTROLS 125
Trip 1 or Trip 2 and Average Fuel
Economy :The Trip display shows the
current distance traveled, in either
kilometers (km) or miles (mi), since
the trip odometer was last reset. The
trip odometer can be reset by pressing
Vand selecting yes or no while this
display is active.
Shows the approximate average liters
per 100 kilometers (L/100 km),
kilometers per liter (km/L), or miles
per gallon (mpg). This number is
calculated based on the number of
L/100 km (mpg) or km/L recorded
since the last time this menu item
was reset. This number reflects only
the approximate average fuel economy
that the vehicle has right now, and
will change as driving conditions
change. The Average Fuel Economy
can be reset by pressing
Vand
selecting yes or no while this display
is active.
Fuel Range : Shows the approximate
distance the vehicle can be driven
without refueling. LOW will be
displayed when the vehicle is low on
fuel. The fuel range estimate is based
on an average of the vehicle's fuel economy over recent driving history
and the amount of fuel remaining in
the fuel tank.
Oil Life :
Shows an estimate of the
oil's remaining useful life.
If REMAINING OIL LIFE 99% is
displayed, that means 99% of the
current oil life remains.
When the remaining oil life is low, the
CHANGE ENGINE OIL SOON message
will appear on the display. The oil
should be changed as soon as
possible. See Engine Oil0311. In
addition to the engine oil life system
monitoring the oil life, additional
maintenance is recommended. See
Maintenance Schedule 0380.
The Oil Life display must be reset
after each oil change. It will not reset
itself. Do not reset the Oil Life display
accidentally at any time other than
when the oil has just been changed.
It cannot be reset accurately until the
next oil change. To reset, see Engine
Oil Life System 0313.
Tire Pressure : Shows the
approximate pressures of all four tires.
Tire pressure is displayed in either
kilopascal (kPa) or in pounds per square inch (psi). If the pressure is
low, the value for that tire is shown in
amber. See
Tire Pressure Monitor
System 0346 and
Tire Pressure Monitor Operation 0347.
Air Filter Life : Shows an estimate of
the engine air filter’s remaining useful
life and the state of the system.
Engine Air Filter Life 95% means 95%
of the current air filter life remains.
Messages will display based on the
engine air filter life and the state of
the system. When the REPLACE AT
NEXT OIL CHANGE message displays,
the engine air filter should be replaced
at the time of the next oil change.
When the REPLACE NOW message
displays, the engine air filter should
be replaced as soon as possible.
The Air Filter Life display must be
reset after the engine air filter
replacement. To reset, see Engine Air
Filter Life System 0314.
Fuel Economy : Displays average fuel
economy, the best fuel economy over
the selected distance, and a bar graph
showing instantaneous fuel economy.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
126 INSTRUMENTS AND CONTROLS
If the vehicle is equipped with an
Active Fuel Management indicator,
the engine operating mode may be
shown in the corner of this display.
Average Speed :Displays the average
vehicle speed of the vehicle in
kilometers per hour (km/h) or miles
per hour (mph). This average is based
on the various vehicle speeds recorded
since the last reset. Reset the average
speed by pressing the thumbwheel
while this display is active to show a
confirmation window to select yes
or no.
Timer : This display can be used as a
timer. To start the timer, press the
thumbwheel while this display is
active. The display will show the
amount of time that has passed since
the timer was last reset. To stop the
timer, press the thumbwheel briefly
while this display is active and the
timer is running.
Press the thumbwheel while this
display is active to reset the timer.
Follow Distance/Gap Setting : When
Adaptive Cruise Control (ACC) is not
engaged, the current follow time to
the vehicle ahead is displayed as a time value on this page. When ACC
has been engaged, the display
switches to the gap setting page. This
page shows the current gap setting
along with the vehicle ahead indicator.
Driver Assistance :
If equipped,
shows information for Lane Keep
Assist (LKA) and Forward Collision
Alert (FCA).
Battery Voltage : Shows the current
battery voltage.
Coolant Temperature : Shows the
engine coolant temperature in either
degrees Celsius (°C) or degrees
Fahrenheit (°F).
Oil Temperature : Shows the engine
oil temperature in either degrees
Celsius (°C) or degrees Fahrenheit (°F).
Engine Boost : If equipped, displays
engine manifold pressure relative to
ambient air pressure. It will display
boost pressure generated by the
turbocharging system.
Transmission Fluid Temperature :
Shows the temperature of the
automatic transmission fluid in either
degrees Celsius (°C) or degrees
Fahrenheit (°F). Off Road :
Displays vehicle pitch and
roll information, road wheel angle,
and four-wheel drive (4WD) status.
Info Page Options : Scroll to choose
which info pages appear on the DIC.
Press the thumbwheel to select or
deselect.
Blank Page : Allows for no
information to be displayed in the
cluster info display areas.
Head-Up Display (HUD)
{Warning
If the HUD image is too bright or
too high in your field of view, it
may take you more time to see
things you need to see when it is
dark outside. Be sure to keep the
HUD image dim and placed low in
your field of view.
If equipped with HUD, some
information concerning the operation
of the vehicle is projected onto the
windshield. The image is projected
through the HUD lens on top of the

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
318 VEHICLE CARE
Check to see if coolant is visible in the
coolant surge tank. If the coolant
inside the coolant surge tank is
boiling, do not do anything else until
it cools down. If coolant is visible but
the coolant level mark is not at or
above the indicated mark, add a 50/
50 mixture of clean, drinkable water
and DEX-COOL coolant. Be sure the
cooling system is cool before this is
done. SeeEngine Overheating 0320.
The coolant surge tank is in the
engine compartment on the driver
side of the vehicle. See Engine
Compartment Overview 0308.
How to Add Coolant to the
Surge Tank
{Warning
Spilling coolant on hot engine parts
can burn you. Coolant contains
ethylene glycol and it will burn if
the engine parts are hot enough.
{Warning
Steam and scalding liquids from a
hot cooling system are under
pressure. Turning the pressure cap,
even a little, can cause them to
come out at high speed and you
could be burned. Never turn the cap
when the cooling system, including
the pressure cap, is hot. Wait for
the cooling system and pressure
cap to cool.
Caution
Failure to follow the specific
coolant fill procedure could cause
the engine to overheat and could
(Continued)
Caution (Continued)
cause system damage. If coolant is
not visible in the surge tank,
contact your dealer.
The coolant surge tank pressure cap
can be removed when the cooling
system, including the surge tank
pressure cap and upper radiator hose,
is no longer hot.
Coolant Fill Instructions (3.6L
Engine Only)
1. Turn the pressure cap slowly counterclockwise. If a hiss is heard,
wait for that to stop. A hiss means
there is still some pressure left.
2. Keep turning the pressure cap slowly and remove it.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
VEHICLE CARE 371
A pressure washer may be used, but
care must be utilized. The following
criteria must be followed:
.Water pressure must be kept below
14,000 KPa (2,000 PSI).
.Water temperature must be below
80 °C (180 °F).
.Spray nozzle with a 40 degree wide
angle spray pattern or wider must
be used.
.Nozzle must be kept at least 30 cm
(1 ft) away from all surfaces.
Finish Care
Application of aftermarket clearcoat
sealant/wax materials is not
recommended. If painted surfaces are
damaged, see your dealer to have the
damage assessed and repaired. Foreign
materials such as calcium chloride
and other salts, ice melting agents,
road oil and tar, tree sap, bird
droppings, chemicals from industrial
chimneys, etc., can damage the
vehicle's finish if they remain on
painted surfaces. Wash the vehicle as
soon as possible. If necessary, usenon-abrasive cleaners that are marked
safe for painted surfaces to remove
foreign matter.
Occasional hand waxing or mild
polishing should be done to remove
residue from the paint finish. See your
dealer for approved cleaning products.
Do not apply waxes or polishes to
uncoated plastic, vinyl, rubber, decals,
simulated wood, or flat paint as
damage can occur.
Caution
Machine compounding or
aggressive polishing on a basecoat/
clearcoat paint finish may damage
it. Use only non-abrasive waxes and
polishes that are made for a
basecoat/clearcoat paint finish on
the vehicle.
To keep the paint finish looking new,
keep the vehicle garaged or covered
whenever possible. Protecting Exterior Bright Metal
Moldings
Caution
Failure to clean and protect the
bright metal moldings can result in
a hazy white finish or pitting. This
damage would not be covered by
the vehicle warranty.
The bright metal moldings on the
vehicle are aluminum, chrome,
or stainless steel. To prevent damage
always follow these cleaning
instructions:
.Be sure the molding is cool to the
touch before applying any cleaning
solution.
.Use only approved cleaning
solutions for aluminum, chrome,
or stainless steel. Some cleaners are
highly acidic or contain alkaline
substances and can damage the
moldings.
.Always dilute a concentrated
cleaner according to the
manufacturer’s instructions.
.Do not use cleaners that are not
intended for automotive use.

Cadillac XT6 Owner Manual (GMNA-Localizing-U.S./Canada-14574701) -
2021 - CRC - 2/8/21
VEHICLE CARE 375
Before using cleaners, read and follow
all safety instructions on the label.
While cleaning the interior, open the
doors and windows to get proper
ventilation.
Caution
To prevent damage:
.Never use a razor or any other
sharp object to remove soil from
any interior surface
.Never use a brush with stiff
bristles.
.Never rub any surface
aggressively or with too much
pressure.
.Do not get any exposed electrical
components wet.
.Do not use laundry detergents or
dishwashing soaps with
degreasers. Do not use solutions
that contain strong or
caustic soap.
.Do not heavily saturate the
upholstery when cleaning.(Continued)
Caution (Continued)
.Do not use solvents or cleaners
containing solvents.
.Do not use disinfecting wipes
that are scented or contain
bleach. Do not use wipes or
cleaners that show a color
transfer to the wipe or change
the appearance of the interior
surface when used.
.Do not use scented or gel-type
hand sanitizers. If hand sanitizer
comes in contact with interior
surfaces of the vehicle, blot
immediately and clean with a
soft cloth dampened with a mild
soap and water solution.
Interior Glass
To clean, use a terry cloth fabric
dampened with water. Wipe droplets
left behind with a clean dry cloth.
If necessary, use a commercial glass
cleaner after cleaning with plain water.
Caution
To prevent scratching, never use
abrasive cleaners on automotive
glass. Abrasive cleaners or
aggressive cleaning may damage
the rear window defogger.
Cleaning the windshield with water
during the first three to six months of
ownership will reduce tendency to fog.
Speaker Covers
Vacuum around a speaker cover
gently, so that the speaker will not be
damaged. Clean spots with water and
mild soap.
Coated Moldings
Coated moldings should be cleaned.
.When lightly soiled, wipe with a
sponge or soft, lint-free cloth
dampened with water.
.When heavily soiled, use warm
soapy water.