2019 CHEVROLET SUBURBAN coolant temperature

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12460269) - 2019 - CRC - 9/11/18
320 Vehicle Care
Warning (Continued)
there would not be an overheat
warning. The engine could catch
fire and you or others could be
burned.
{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
cause system damage. If coolant
is not visible in the surge tank,
contact your dealer.
If no coolant is visible in the surge
tank, add coolant.
1. Remove the coolant surge tank pressure cap 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 about one full
turn. 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.
3. Fill the coolant surge tank withthe proper mixture to the full
cold mark.
4. With the coolant surge tank pressure cap off, start the
engine and let it run until the
engine coolant temperature
gauge indicates approximately
90 °C (195 °F).

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12460269) - 2019 - CRC - 9/11/18
Vehicle Care 321
By this time, the coolant level
inside the coolant surge tank
may be lower. If the level is
lower, add more of the proper
mixture to the coolant surge
tank until the level reaches the
full cold mark.
5. Replace the pressure cap tightly.
6. Verify coolant level after the engine is shut off and the
coolant is cold. If necessary,
repeat coolant fill procedure
Steps 1–6.
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.
Engine Overheating
For a heavy-duty Suburban, see the
Suburban Heavy-Duty Package
supplement.
Caution
Running the engine without
coolant may cause damage or a
fire. Vehicle damage would not be
covered by the vehicle warranty.
The vehicle has several indicators
to warn of engine overheating.
There is a coolant temperature
gauge in the vehicle's instrument
cluster. See Engine Coolant
Temperature Gauge 0151.
In addition, there are ENGINE
OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS
REDUCED messages in the Driver
Information Center (DIC).
If the decision is made not to lift the
hood when this warning appears,
get service help right away.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface. Check to see if the engine cooling
fan(s) are running. If the engine is
overheating, the fans should be
running. If they are not, do not
continue to run the engine. Have the
vehicle serviced.
Caution
Do not run the engine if there is a
leak in the engine cooling system.
This can cause a loss of all
coolant and can damage the
system and vehicle. Have any
leaks fixed right away.
If Steam is Coming from the
Engine Compartment
{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
(Continued)

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12460269) - 2019 - CRC - 9/11/18
322 Vehicle Care
Warning (Continued)
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to cool.
If No Steam is Coming from
the Engine Compartment
The ENGINE OVERHEATED STOP
ENGINE or the ENGINE
OVERHEATED IDLE ENGINE
message, along with a low coolant
condition, can indicate a serious
problem.
If there is an engine overheat
warning, but no steam is seen or
heard, the problem may not be too
serious. Sometimes the engine can
get a little too hot when the vehicle:
.Climbs a long hill on a hot day.
. Stops after high-speed driving.
. Idles for long periods in traffic.
. Tows a trailer; see Trailer Towing
0 283. If the ENGINE OVERHEATED
STOP ENGINE or the ENGINE
OVERHEATED IDLE ENGINE
message appears with no sign of
steam, try this for a minute or so:
1. Turn the air conditioning off.
2. Turn the heater on to the highest temperature and to the
highest fan speed. Open the
windows as necessary.
3. When it is safe to do so, pull off the road, shift to P (Park) or
N (Neutral), and let the
engine idle.
If the engine coolant temperature
gauge is no longer in the overheat
zone or an overheat warning no
longer displays, the vehicle can be
driven. Continue to drive the vehicle
slowly for about 10 minutes. Keep a
safe vehicle distance from the
vehicle in front. If the warning does
not come back on, continue to drive
normally and have the cooling
system checked for proper fill and
function. If the warning continues, pull over,
stop, and park the vehicle
right away.
If there is still no sign of steam and
the vehicle is equipped with an
engine driven cooling fan, push
down the accelerator until the
engine speed is about twice as fast
as normal idle speed for at least
five minutes while the vehicle is
parked. If the warning is still there,
turn off the engine and get everyone
out of the vehicle until it cools down.
If there is no sign of steam, idle the
engine for five minutes while
parked. If the warning is still
displayed, turn off the engine until it
cools down.
Engine Fan
If the vehicle has electric cooling
fans, the fans may be heard
spinning at low speed during most
everyday driving. The fans may turn
off if no cooling is required. Under
heavy vehicle loading, trailer towing,
high outside temperatures,
or operation of the air conditioning

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12460269) - 2019 - CRC - 9/11/18
Vehicle Care 323
system, the fans may change to
high speed and an increase in fan
noise may be heard. This is normal
and indicates that the cooling
system is functioning properly. The
fans will change to low speed when
additional cooling is no longer
required.
The electric engine cooling fans
may run after the engine has been
turned. off. This is normal and no
service is required.
Power Steering Fluid
For a heavy-duty Suburban, see the
Suburban Heavy-Duty Package
supplement.
Washer Fluid
What to Use
When windshield washer fluid needs
to be added, be sure to read the
manufacturer's instructions before
use. Use a fluid that has sufficient
protection against freezing in an
area where the temperature may fall
below freezing.
Adding Washer Fluid
The vehicle has a low washer fluid
message on the DIC that comes on
when the washer fluid is low. The
message is displayed for
15 seconds at the start of each
ignition cycle. When the WASHER
FLUID LOW ADD FLUID message
displays, washer fluid will need to
be added to the windshield washer
fluid reservoir.
Open the cap with the washer
symbol on it. Add washer fluid until
the tank is full. SeeEngine
Compartment Overview 0303 for
reservoir location.
Caution
. Do not use washer fluid that
contains any type of water
repellent coating. This can
cause the wiper blades to
chatter or skip.
. Do not use engine coolant
(antifreeze) in the
windshield washer. It can
damage the windshield
washer system and paint.
. Do not mix water with
ready-to-use washer fluid.
Water can cause the
solution to freeze and
damage the washer fluid
tank and other parts of the
washer system.
. When using concentrated
washer fluid, follow the
manufacturer instructions for
adding water.
. Fill the washer fluid tank
only three-quarters full when
it is very cold. This allows
(Continued)

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-12460269) - 2019 - CRC - 9/11/18
Index 449
ChargingWireless . . . . . . . . . . . . . . . . . . . . . . 141
Charging System Light . . . . . . . . . 155
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 155
Ignition Transmission Lock . . . 329
Child Restraints Infants and Young Children . . . 108
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . .114
Older Children . . . . . . . . . . . . . . . . 107
Securing . . . . . . . . . . . . 122, 124, 125
Systems . . . . . . . . . . . . . . . . . . . . . . . 111
Child-View Mirror . . . . . . . . . . . . . . . . 59
Circuit Breakers . . . . . . . . . . . . . . . . 337
Cleaning Exterior Care . . . . . . . . . . . . . . . . . 391
Interior Care . . . . . . . . . . . . . . . . . . 396
Climate Control Systems Dual Automatic . . . . . . . . . . . . . . . 194
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . 198
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
Cluster, Instrument . . . . . . . . . . . . . 145
Collision Damage Repair . . . . . . . 428
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . 128
Compass . . . . . . . . . . . . . . . . . . . . . . . 138 Connected Services
Connections . . . . . . . . . . . . . . . . . . 444
Diagnostics . . . . . . . . . . . . . . . . . . . 446
Navigation . . . . . . . . . . . . . . . . . . . . 443
Connections Connected Services . . . . . . . . . . 444
Control
Hill Descent . . . . . . . . . . . . . . . . . . 248
Traction and ElectronicStability . . . . . . . . . . . . . . . . . . . . . 246
Control Light
Hill Descent . . . . . . . . . . . . . . . . . . 158
Control of a Vehicle . . . . . . . . . . . . . 204
Convenience Net . . . . . . . . . . . . . . . 131
Convex Mirrors . . . . . . . . . . . . . . . . . . 56
Coolant Engine Temperature Gauge . . 151
Cooling . . . . . . . . . . . . . . . . . . . . 194, 198
Cooling System . . . . . . . . . . . . . . . . . 317
Courtesy Transportation Program . . . . . . . . . . . . . . . . . . . . . . . 427
Cruise Control . . . . . . . . . . . . . . . . . . 250 Light . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Cruise Control, Adaptive . . . . . . . . 252
Cupholders . . . . . . . . . . . . . . . . . . . . . 128
Customer Assistance . . . . . . . . . . . 424 Offices . . . . . . . . . . . . . . . . . . . . . . . . 423 Customer Assistance (cont'd)
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 424
Customer Information
Publications OrderingInformation . . . . . . . . . . . . . . . . . . 431
Customer Satisfaction Procedure . . . . . . . . . . . . . . . . . . . . . 421
D
Damage Repair, Collision . . . . . . . 428
Danger, Warning, and Caution . . . . 3
Data CollectionInfotainment System . . . . . . . . . . 434
OnStar . . . . . . . . . . . . . . . . . . . . . . . 434
Data Recorders, Event . . . . . . . . . 433
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 186
Defensive Driving . . . . . . . . . . . . . . . 204
Delayed Locking . . . . . . . . . . . . . . . . . 45
Diagnostics
Connected Services . . . . . . . . . . 446
Distracted Driving . . . . . . . . . . . . . . . 203
Dome Lamps . . . . . . . . . . . . . . . . . . . 189
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . 162
Delayed Locking . . . . . . . . . . . . . . . . 45
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-12460269) - 2019 - CRC - 9/11/18
450 Index
Door (cont'd)Power Locks . . . . . . . . . . . . . . . . . . . . 45
Drive Belt Routing, Engine . . . . . . 420
Driver Assistance Systems . . . . . 259
Driver Information Center (DIC) . . . . . . . . . . . . . 163, 164
Driving Assistance Systems . . . . . . . . . . 264
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 278
Defensive . . . . . . . . . . . . . . . . . . . . . 204
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 204
For Better Fuel Economy . . . . . . . 27
Hill and Mountain Roads . . . . . . 212
If the Vehicle is Stuck . . . . . . . . . 214
Loss of Control . . . . . . . . . . . . . . . 206
Off-Road . . . . . . . . . . . . . . . . . . . . . 206
Off-Road Recovery . . . . . . . . . . . 205
Vehicle Load Limits . . . . . . . . . . . 215
Wet Roads . . . . . . . . . . . . . . . . . . . .211
Winter . . . . . . . . . . . . . . . . . . . . . . . . 212
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 194
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 275
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 298 Electrical System
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 338
Fuses and Circuit Breakers . . . 337
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . 342, 345
Overload . . . . . . . . . . . . . . . . . . . . . 337
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 347
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 436
Engine Air Cleaner/Filter . . . . . . . . . . . . . 316
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 155
Compartment Overview . . . . . . . 303
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 151
Cooling System . . . . . . . . . . . . . . . 317
Drive Belt Routing . . . . . . . . . . . . 420
Exhaust . . . . . . . . . . . . . . . . . . . . . . 230
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Heater . . . . . . . . . . . . . . . . . . . . . . . . 226
Oil Life System . . . . . . . . . . . . . . . .311
Oil Pressure Gauge . . . . . . . . . . 150
Overheating . . . . . . . . . . . . . . . . . . 321
Power Messages . . . . . . . . . . . . . 171
Running While Parked . . . . . . . . 231 Engine (cont'd)
Starting . . . . . . . . . . . . . . . . . . . . . . . 224
Entry Lighting . . . . . . . . . . . . . . . . . . . 190
Equipment, Towing . . . . . . . . . . . . . 289
Event Data Recorders . . . . . . . . . . 433
Exit Lighting . . . . . . . . . . . . . . . . . . . . 191
Extended Parking . . . . . . . . . . . . . . . 230
Extender, Seat Belt . . . . . . . . . . . . . . 92
Exterior Lamp Controls . . . . . . . . . 183
Exterior Lamps Off Reminder . . . 185
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 192
F
FanEngine . . . . . . . . . . . . . . . . . . . . . . . . 322
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . . 12
Filter,
Engine Air Cleaner . . . . . . . . . . . 316
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 186
Flashers, Hazard Warning . . . . . . 187
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 369 Changing . . . . . . . . . . . . . . . . . . . . . 371
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Floor Console Storage . . . . . . . . . . 131
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 399

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-12460269) - 2019 - CRC - 9/11/18
Index 451
FluidAutomatic
Transmission . . . . . . . . . . . 313, 316
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 324
Four-Wheel Drive Transfer Case . . . . . . . . . . . . . . . 239
Power Steering . . . . . . . . . . . . . . . 323
Washer . . . . . . . . . . . . . . . . . . . . . . . 323
Fog Lamps . . . . . . . . . . . . . . . . . . . . . 188 Bulb Replacement . . . . . . . . . . . . 334
Folding Mirrors . . . . . . . . . . . . . . . . . . 57
Forward Automatic Braking . . . . . 267
Forward Collision Alert
(FCA) System . . . . . . . . . . . . . . . . . 265
Four-Wheel Drive . . . . . . . . . . 239, 326
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 431
Front Axle . . . . . . . . . . . . . . . . . . . . . . 327
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Front Seats
Adjustment . . . . . . . . . . . . . . . . . . . . . 66
Heated and Ventilated . . . . . . . . . . 73
Front Turn Signal Lamps . . . . . . . 334
Fuel Additives . . . . . . . . . . . . . . . . . . . . . 274
Economy Driving . . . . . . . . . . . . . . . 27 Fuel (cont'd)
Filling a Portable Fuel
Container . . . . . . . . . . . . . . . . . . . 277
Filling the Tank . . . . . . . . . . . . . . . 276
Foreign Countries . . . . . . . . . . . . 274
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 149
Low Fuel Warning Light . . . . . . . 161
Management, Active . . . . . . . . . . 229
Prohibited Fuels . . . . . . . . . . . . . . 274
Recommended . . . . . . . . . . . . . . . 273
Top Tier . . . . . . . . . . . . . . . . . . . . . . 273
Full-Size Spare Tire . . . . . . . . . . . . 380
Fuses Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 338
Fuses and Circuit Breakers . . . 337
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . 342, 345
Rear Compartment Fuse Block . . . . . . . . . . . . . . . . . . . . . . . . 347
G
Garage Door Opener . . . . . . . . . . . 180Programming . . . . . . . . . . . . . . . . . 180
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . 331
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . . 151 Gauges (cont'd)
Engine Oil Pressure . . . . . . . . . . 150
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 149
Odometer . . . . . . . . . . . . . . . . . . . . . 149
Speedometer . . . . . . . . . . . . . . . . . 149
Tachometer . . . . . . . . . . . . . . . . . . . 149
Trip Odometer . . . . . . . . . . . . . . . . 149
Voltmeter . . . . . . . . . . . . . . . . . . . . . 152
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . 144
General Information Service and Maintenance . . . . . 401
Towing . . . . . . . . . . . . . . . . . . . . . . . . 278
Vehicle Care . . . . . . . . . . . . . . . . . . 300
Glass Replacement . . . . . . . . . . . . . 331
Glove Box . . . . . . . . . . . . . . . . . . . . . . 128
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 425
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 333
Hazard Warning Flashers . . . . . . . 187
Head Restraints . . . . . . . . . . . . . . . . . 65
Head-up Display . . . . . . . . . . . . . . . . 167
Headlamps . . . . . . . . . . . . . . . . . . . . . 333
Aiming . . . . . . . . . . . . . . . . . . . . . . . . 332
Automatic . . . . . . . . . . . . . . . . . . . . . 186
Bulb Replacement . . . . . . . . . . . . 333