Cooling fan CADILLAC CTS 2018 Owner's Manual

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
IN BRIEF 19
Climate Controls
The climate control buttons on the center stack and on the climate control
display are used to adjust the heating, cooling, and ventilation.
Center Stack Climate Controls
1. Driver and Passenger Temperature Controls
2. Fan Control
3. OFF (Fan)
4. Driver and Passenger Heated and Ventilated Seats (If Equipped) 5. Recirculation
6. Rear Window Defogger
7. Defrost
8. AUTO (Automatic Operation)
Climate Control Display
1. Driver and Passenger Temperature Controls
2. Fan Controls
3. Rear (Rear Climate Control Display, If Equipped)
4. Sync (Synchronize Driver and Passenger Temperature)
5. Recirculation
6. Air Delivery Mode Control
7. Auto (Automatic Operation)
8. A/C (Air Conditioning)
9. On/Off

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
160 LIGHTING
When the battery's state of charge is
low, the voltage is raised slightly to
quickly bring the charge back up.
When the state of charge is high, the
voltage is lowered slightly to prevent
overcharging. If the vehicle has a
voltmeter gauge or a voltage display
on the Driver Information Center
(DIC), you may see the voltage move
up or down. This is normal. If there is
a problem, an alert will be displayed.
The battery can be discharged at idle
if the electrical loads are very high.
This is true for all vehicles. This is
because the generator (alternator)
may not be spinning fast enough at
idle to produce all the power that is
needed for very high electrical loads.
A high electrical load occurs when
several of the following are on, such
as: headlamps, high beams, fog lamps,
rear window defogger, climate control
fan at high speed, heated seats, engine
cooling fans, and loads plugged into
accessory power outlets.
EPM works to prevent excessive
discharge of the battery. It does this
by balancing the generator's output
and the vehicle's electrical needs.It can increase engine idle speed to
generate more power, whenever
needed. It can temporarily reduce the
power demands of some accessories.
Normally, these actions occur in steps
or levels, without being noticeable. In
rare cases at the highest levels of
corrective action, this action may be
noticeable to the driver. If so, a DIC
message might be displayed. If a
battery message is displayed, it is
recommended that the driver reduce
the electrical loads as much as
possible. See
Driver Information Center
(DIC) 0137.
Battery Power Protection
The battery saver feature is designed
to protect the vehicle's battery.
If some interior lamps are left on and
the ignition is turned off, the battery
rundown protection system
automatically turns the lamp off after
some time.
Exterior Lighting Battery
Saver
The exterior lamps turn off about
10 minutes after the ignition is turned
off, if the parking lamps or headlamps
have been manually left on. This
protects against draining the battery.
To restart the 10-minute timer, turn
the exterior lamp control to the
O
position and then back to the;
or2position.
To keep the lamps on for more than
10 minutes, the ignition must be on or
in ACC/ACCESSORY.

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
CLIMATE CONTROLS 167
Climate Controls
Climate Control Systems
Dual Automatic Climate ControlSystem . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Rear Climate Control System . . . . 172
Air Vents
Air Vents . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Maintenance
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Climate Control Systems
Dual Automatic Climate Control System
The climate control buttons on the center stack and on the climate control
display are used to adjust the heating, cooling, and ventilation.
Center Stack Climate Controls
1. Driver and Passenger Temperature Controls
2. Fan Control
3. OFF (Fan)
4. Driver and Passenger Heated and Ventilated Seats (If Equipped)
5. Recirculation 6. Rear Window Defogger
7. Defrost
8. AUTO (Automatic Operation)

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
VEHICLE CARE 257
1. Windshield Washer FluidReservoir. See Washer Fluid
0 275.
2. Remote Positive (+) Battery Terminal. See Jump Starting -
North America 0323.
3. Engine Compartment Fuse Block
0286. 4. Engine Coolant Surge Tank and
Pressure Cap. See Cooling System
0 269.
5. Remote Negative (-) Battery Terminal. See Jump Starting -
North America 0323.
6. Engine Oil Fill Cap. See Engine Oil
0 263. 7. Engine Cooling Fan (Out of
View). See Cooling System 0269.
8. Engine Oil Dipstick. See Engine
Oil 0263.
9. Engine Air Cleaner/Filter 0267.
10. Brake Fluid Reservoir. See Brake
Fluid 0276.

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
VEHICLE CARE 259
1. Windshield Washer FluidReservoir. See Washer Fluid
0 275.
2. Remote Positive (+) Battery Terminal. See Jump Starting -
North America 0323.
3. Remote Negative (-) Battery Terminal. See Jump Starting -
North America 0323. 4. Engine Coolant Surge Tank and
Pressure Cap. See Cooling System
0 269.
5. Engine Compartment Fuse Block
0286.
6. Engine Cooling Fan (Out of View). See Cooling System 0269. 7. Engine Oil Fill Cap. See
Engine Oil
0 263.
8. Engine Oil Dipstick. See Engine
Oil 0263.
9. Brake Fluid Reservoir. See Brake
Fluid 0276.
10. Engine Air Cleaner/Filter 0267.

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
VEHICLE CARE 261
1. Windshield Washer FluidReservoir. See Washer Fluid
0 275.
2. Remote Positive (+) Battery Terminal. See Jump Starting -
North America 0323.
3. Engine Compartment Fuse Block
0286. 4. Engine Coolant Surge Tank and
Pressure Cap. See Cooling System
0 269.
5. Remote Negative (-) Battery Terminal. See Jump Starting -
North America 0323.
6. Engine Cooling Fan (Out of View). See Cooling System 0269. 7. Engine Oil Fill Cap. See
Engine Oil
0 263.
8. Engine Oil Dipstick. See Engine
Oil 0263.
9. Engine Air Cleaner/Filter 0267.
10. Brake Fluid Reservoir. See Brake
Fluid 0276.

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
VEHICLE CARE 263
1. Windshield Washer FluidReservoir. See Washer Fluid
0 275.
2. Remote Positive (+) Battery Terminal. See Jump Starting -
North America 0323.
3. Engine Compartment Fuse Block
0286.
4. Engine Coolant Surge Tank and Pressure Cap. See Cooling System
0 269.
5. Remote Negative (-) Battery Terminal. See Jump Starting -
North America 0323.
6. Engine Oil Dipstick. See Engine
Oil 0263.
7. Engine Cooling Fan (Out of View). See Cooling System 0269.
8. Engine Oil Fill Cap (Out of View). See Engine Oil 0263.
9. Engine Air Cleaner/Filter 0267.
10. Brake Fluid Reservoir. See Brake
Fluid 0276.Engine Oil
To ensure proper engine performance
and long life, careful attention must
be paid to engine oil. Following these
simple, but important steps will help
protect your investment:
.
Use engine oil approved to the
proper specification and of the
proper viscosity grade. See
“Selecting the Right Engine Oil” in
this section.
. Check the engine oil level regularly
and maintain the proper oil level.
See “Checking Engine Oil” and
“When to Add Engine Oil” in this
section.
. Change the engine oil at the
appropriate time. See Engine Oil
Life System 0265.
. Always dispose of engine oil
properly. See “What to Do with
Used Oil” in this section.
Checking Engine Oil
Check the engine oil level regularly,
every 650 km (400 mi), especially prior
to a long trip. The engine oil dipstick handle is a loop. See
Engine
Compartment Overview 0256 for the
location.
{Warning
The engine oil dipstick handle may
be hot; it could burn you. Use a
towel or glove to touch the dipstick
handle.
If a low oil Driver Information Center
(DIC) message displays, check the oil
level.
Follow these guidelines:
. To get an accurate reading, park
the vehicle on level ground. Check
the engine oil level after the
engine has been off for at least
two hours. Checking the engine oil
level on steep grades or too soon
after engine shutoff can result in
incorrect readings. Accuracy
improves when checking a cold
engine prior to starting. Remove
the dipstick and check the level.

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
VEHICLE CARE 269
Caution
If the air cleaner/filter is off, dirt
can easily get into the engine,
which could damage it. Always have
the air cleaner/filter in place when
driving.
Cooling System
The cooling system allows the engine
to maintain the correct working
temperature.
2.0L L4 Engine (LTG)
1. Engine Coolant Surge Tankand Pressure Cap
2. Engine Cooling Fan (Out of View)
3.6L V6 Engine (LGX)
1. Engine Coolant Surge Tank
and Pressure Cap
2. Engine Cooling Fan (Out of View)

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
270 VEHICLE CARE
3.6L V6 Engine (LF3)
1. Engine Coolant Surge Tankand Pressure Cap
2. Engine Cooling Fan (Out of View)
6.2L V8 Engine (LT4)
1. Engine Coolant Surge Tank
and Pressure Cap
2. Engine Cooling Fan (Out of View)
{Warning
An underhood electric fan can start
up even when the engine is not
running and can cause injury. Keep
hands, clothing, and tools away
from any underhood electric fan.
{Warning
Do not touch heater or radiator
hoses, or other engine parts. They
can be very hot and can burn you.
Do not run the engine if there is a
leak; all coolant could leak out.
That could cause an engine fire and
can burn you. Fix any leak before
driving the vehicle.
Engine Coolant
The cooling system in the vehicle is
filled with DEX-COOL engine coolant.
See Maintenance Schedule 0339 and
Recommended Fluids and Lubricants
0 348.
The following explains the cooling
system and how to check and add
coolant when it is low. If there is a
problem with engine overheating, see
Engine Overheating 0274.

Cadillac CTS/CTS-V Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11349156) - 2018 - CRC - 9/29/17
VEHICLE CARE 273
1. Remove the coolant surge tankpressure cap from the top
chamber when the cooling
system, including the coolant
surge tank pressure cap and
upper radiator hose, is no
longer hot.
Turn the pressure cap slowly
counterclockwise. If you hear a
hiss, wait for that to stop. This
will allow any pressure still left
to be vented out the
discharge hose.
2. Keep turning the pressure cap slowly and remove it. Open the
surge tank service port cap to
the lower chamber. The service
port is behind the top chamber.
3. Fill the surge tank top chamberwith the proper mixture to the
bottom of the fill neck. The top
chamber needs to be completely
full. Fill the surge tank bottom
chamber through the service port
to approximately half.
4. With the coolant surge tank pressure cap off and the surge
tank service port cap open, start
the engine and let it run until
you can feel the upper radiator
hose getting hot. Watch out for
the engine cooling fan(s).
By this time, the coolant level
inside the coolant surge tank top
chamber may be lower. If the level is lower, add more of the
proper mixture to the surge tank
top chamber until the level
reaches the bottom of the
fill neck.
5. Replace the surge tank pressure cap tightly and close the surge
tank service port cap.
6. Check the level in the surge tank top and bottom chambers when
the cooling system has cooled
down. If the coolant is not at the
proper levels, repeat Steps 1–
6 and reinstall the pressure cap
and close the service port. If the
coolant still is not at the proper
levels when the system cools
down again, see your dealer.
Caution
If the pressure cap is not tightly
installed, coolant loss and engine
damage may occur. Be sure the cap
is properly and tightly secured.