2020 CHEVROLET SUBURBAN heating

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13566622) - 2020 - CRC - 4/15/19
Vehicle Care 305
Engine Overheating
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 0134.
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)
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
0 267.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13566622) - 2020 - CRC - 4/15/19
Vehicle Care 329
RelaysUsage
51 –
52 Retained accessory power
53 –
54 –
55 –
Rear Compartment Fuse
Block
The rear compartment fuse block is
behind the access panel on the left
side of the rear cargo area. Pull the panel out by grabbing the
finger access slot at the rear edge.
The vehicle may not be equipped
with all of the fuses, relays, and
features shown.
Fuses Usage
2 –
3 Right heated second row seat
4 Heated mirrors
5 Liftgate
6 Glass breakage
7 Liftglass
8 Liftgate module logic
9 Rear wiper
10 Rear heating, ventilation, and air
conditioning blower
11 Second row seat folding
12 Liftgate module
13 Third row seat folding
14 Rear accessory power outlet

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13566622) - 2020 - CRC - 4/15/19
330 Vehicle Care
FusesUsage
15 Rear window defogger
19 Rear fog lamp
Relays Usage
1 Rear window defogger
16 Liftgate
17 Liftglass
18 Rear fog lamp
20 Heated mirrorWheels and Tires
Tires
Every new GM vehicle has
high-quality tires made by a
leading tire manufacturer. See
the warranty manual for
information regarding the tire
warranty and where to get
service. For additional
information refer to the tire
manufacturer.
{Warning
.Poorly maintained and
improperly used tires are
dangerous.
.Overloading the tires can
cause overheating as a
result of too much
flexing. There could be a
blowout and a serious
crash. See Vehicle Load
Limits 0200.
(Continued)
Warning (Continued)
.Underinflated tires pose
the same danger as
overloaded tires. The
resulting crash could
cause serious injury.
Check all tires frequently
to maintain the
recommended pressure.
Tire pressure should be
checked when the tires
are cold.
.Overinflated tires are
more likely to be cut,
punctured, or broken by
a sudden impact —such
as when hitting a pothole.
Keep tires at the
recommended pressure.
.Worn or old tires can
cause a crash. If the
tread is badly worn,
replace them.
(Continued)

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13566622) - 2020 - CRC - 4/15/19
Vehicle Care 337
Vehicle Capacity Weight:The
number of designated seating
positions multiplied by
68 kg (150 lb) plus the rated
cargo load. See Vehicle Load
Limits 0200.
Vehicle Maximum Load on the
Tire
:Load on an individual tire
due to curb weight, accessory
weight, occupant weight, and
cargo weight.
Vehicle Placard
:A label
permanently attached to a
vehicle showing the vehicle
capacity weight and the original
equipment tire size and
recommended inflation pressure.
See “Tire and Loading
Information Label” underVehicle
Load Limits 0200.
Tire Pressure
Tires need the correct amount of
air pressure to operate
effectively.
{Warning
Neither tire underinflation nor
overinflation is good.
Underinflated tires, or tires
that do not have enough air,
can result in:
.Tire overloading and
overheating which could
lead to a blowout.
.Premature or
irregular wear.
.Poor handling.
.Reduced fuel economy.
Overinflated tires, or tires that
have too much air, can
result in:
.Unusual wear.
.Poor handling.
.Rough ride.
.Needless damage from
road hazards. The Tire and Loading
Information label on the vehicle
indicates the original equipment
tires and the correct cold tire
inflation pressures. The
recommended pressure is the
minimum air pressure needed to
support the vehicle's maximum
load carrying capacity.
For additional information
regarding how much weight the
vehicle can carry, and an
example of the Tire and Loading
Information label, see
Vehicle
Load Limits 0200. How the
vehicle is loaded affects vehicle
handling and ride comfort. Never
load the vehicle with more
weight than it was designed to
carry.
When to Check
Check the pressure of the tires
once a month or more.

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13566622) - 2020 - CRC - 4/24/19
428 Index
Power Locks . . . . . . . . . . . . . . . . . . . . 25
Drive Belt Routing, Engine . . . . . . 399
Driver Assistance Systems . . . . . 243
Driver Information
Center (DIC) . . . . . . . . . . . . . 145, 147
Driving Assistance Systems . . . . . . . . . . 248
Better Fuel Economy . . . . . . . . . 187
Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 262
Defensive . . . . . . . . . . . . . . . . . . . . . 188
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 188
Hill and Mountain Roads . . . . . . 196
If the Vehicle is Stuck . . . . . . . . . 198
Loss of Control . . . . . . . . . . . . . . . 190
Off-Road . . . . . . . . . . . . . . . . . . . . . 191
Off-Road Recovery . . . . . . . . . . . 190
Vehicle Load Limits . . . . . . . . . . . 200
Wet Roads . . . . . . . . . . . . . . . . . . . 196
Winter . . . . . . . . . . . . . . . . . . . . . . . . 197
Dual Automatic Climate
Control System . . . . . . . . . . . . . . . . 178
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 258
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 282 Electrical System
Engine Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 320
Fuses and Circuit Breakers . . . 319
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . 324, 327
Overload . . . . . . . . . . . . . . . . . . . . . 319
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . . . 329
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . 415
Engine Air Cleaner/Filter . . . . . . . . . . . . . 300
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 137
Compartment Overview . . . . . . . 288
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 134
Cooling System . . . . . . . . . . . . . . . 301
Drive Belt Routing . . . . . . . . . . . . 399
Exhaust . . . . . . . . . . . . . . . . . . . . . . 215
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 306
Heater . . . . . . . . . . . . . . . . . . . . . . . . .211
Oil Life System . . . . . . . . . . . . . . . 295
Oil Pressure Gauge . . . . . . . . . . 133
Overheating . . . . . . . . . . . . . . . . . . 305
Power Messages . . . . . . . . . . . . . 154
Running While Parked . . . . . . . . 216 Starting . . . . . . . . . . . . . . . . . . . . . . . 209
Entry Lighting . . . . . . . . . . . . . . . . . . . 174
Equipment, Towing . . . . . . . . . . . . . 272
Event Data Recorders . . . . . . . . . . 412
Exit Lighting . . . . . . . . . . . . . . . . . . . . 175
Extended Parking . . . . . . . . . . . . . . . 214
Extender, Seat Belt . . . . . . . . . . . . . . 72
Exterior Lamp Controls . . . . . . . . . 167
Exterior Lamps Off Reminder . . . 169
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . . . 176
F
Fan
Engine . . . . . . . . . . . . . . . . . . . . . . . . 306
Filter, Engine Air Cleaner . . . . . . . . . . . 300
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 170
Flashers, Hazard Warning . . . . . . 171
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 351 Changing . . . . . . . . . . . . . . . . . . . . . 353
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 258
Floor Console Storage . . . . . . . . . . 113
Floor Mats . . . . . . . . . . . . . . . . . . . . . . 379
Fluid AutomaticTransmission . . . . . . . . . . . 296, 299

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13566622) - 2020 - CRC - 4/24/19
430 Index
HeatedRear Seats . . . . . . . . . . . . . . . . . . . . . 54
Steering Wheel . . . . . . . . . . . . . . . .117
Heated and Ventilated Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Heated Mirrors . . . . . . . . . . . . . . . . . . . 38
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . .211
Heating . . . . . . . . . . . . . . . . . . . . 178, 182
High-Beam On Light . . . . . . . . . . . . 143
High-Speed Operation . . . . . . . . . . 338
Hill and Mountain Roads . . . . . . . . 196
Hill Descent Control (HDC) . . . . . 231
Hill Descent Control Light . . . . . . . 141
Hill Start Assist (HSA) . . . . . . . . . . 228
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . 64
HVAC . . . . . . . . . . . . . . . . . . . . . . 178, 182
I
Ignition Positions . . . . . . . . . . 205, 207
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 311
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 35 Indicator
Vehicle Ahead . . . . . . . . . . . . . . . . 141
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 89
Information Publication Ordering . . . . . . . . . . 409
Infotainment . . . . . . . . . . . . . . . . . . . . 177
Infotainment System . . . . . . . . . . . . 413
Instrument Cluster . . . . . . . . . . . . . . 127
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . .110
Instrument Panel Overview . . . . . . . 5
Interior Rearview Mirrors . . . . . . . . . 39
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 363
K
Keyless EntryRemote (RKE) System . . . . . 13, 16
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . .9, 10
L
Labeling, Tire Sidewall . . . . . . . . . . 332
Lamps Auxiliary Roof
Mounted Lamp . . . . . . . . . . . . . . 172 Daytime Running (DRL) . . . . . . 170
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 173
Exterior Controls . . . . . . . . . . . . . . 167
Exterior Lamps Off
Reminder . . . . . . . . . . . . . . . . . . . 169
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . 176
Front Turn Signal . . . . . . . . . . . . . 316
License Plate . . . . . . . . . . . . . . . . . 318
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . 137
On Reminder . . . . . . . . . . . . . . . . . 144
Reading . . . . . . . . . . . . . . . . . . . . . . 174
Lane Change Alert (LCA) . . . . . . . 252
Lane Keep Assist (LKA) . . . . . . . . 254
Lane Keep Assist Light . . . . . . . . . 141
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . . 72
Lap-Shoulder Belt . . . . . . . . . . . . . . . 66
LATCH System Replacing Parts after aCrash . . . . . . . . . . . . . . . . . . . . . . . 104
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . 94
LED Lighting . . . . . . . . . . . . . . . . . . . . 315
Level Control Automatic . . . . . . . . . . . . . . . . . . . . . 232
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chevrolet Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13566622) - 2020 - CRC - 4/24/19
432 Index
N
NavigationConnected Services . . . . . . . . . . 422
Net, Convenience . . . . . . . . . . . . . . 113
New Vehicle Break-In . . . . . . . . . . . 204
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . 131 Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Off-Road . . . . . . . . . . . . . . . . . . . . . . . 191 Driving . . . . . . . . . . . . . . . . . . . . . . . . 191
Recovery . . . . . . . . . . . . . . . . . . . . . 190
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 293
Engine Oil Life System . . . . . . . 295
Engine Oil Pressure Gauge . . . 133
Older Children, Restraints . . . . . . . 87
Online Owner Center . . . . . . . . . . . 403
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 413
OnStar Additional Information . . . . . . . . . . . . . . . . . . . . 416
OnStar Emergency . . . . . . . . . . . . . 415
OnStar Overview . . . . . . . . . . . . . . . 414
OnStar Security . . . . . . . . . . . . . . . . 416
Operation Fog Lamps . . . . . . . . . . . . . . . . . . . 172 Outlets
Power . . . . . . . . . . . . . . . . . . . . . . . . 121
Overheating, Engine . . . . . . . . . . . . 305
Overview Instrument Panel . . . . . . . . . . . . . . . . 5
P
ParkShifting Out of . . . . . . . . . . . . . . . . 214
Park Assist . . . . . . . . . . . . . . . . . . . . . 244
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . 228
Brake and P (Park)
Mechanism Check . . . . . . . . . . 312
Extended . . . . . . . . . . . . . . . . . . . . . 214
Over Things That Burn . . . . . . . 214
Parking or Backing
Assistance Systems . . . . . . . . . . 244
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . . 136
Passenger Compartment Air
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Passenger Sensing System . . . . . 81
Perchlorate Materials Requirements, California . . . . . . 285
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 154 Power
Door Locks . . . . . . . . . . . . . . . . . . . . . 25
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Outlets . . . . . . . . . . . . . . . . . . . . . . . 121
Protection, Battery . . . . . . . . . . . . 176
Retained Accessory (RAP) . . . 212
Seat Adjustment . . . . . . . . . . . . . . . . 47
Windows . . . . . . . . . . . . . . . . . . . . . . . 40
Power Assist Steps . . . . . . . . . . . . . . 32
Pregnancy, Using Seat Belts . . . . 71
Privacy Vehicle Data Recording . . . . . . . 412
Program Courtesy Transportation . . . . . . 406
Prohibited Fuels . . . . . . . . . . . . . . . . 257
Proposition 65 Warning,
California . . . . . . . . . . . .285, 309, 363, Back Cover
Publication Ordering Information . . . . . . . . . . . . . . . . . . . . 409
R
Radio Frequency Statement . . . . 410
Reading Lamps . . . . . . . . . . . . . . . . . 174
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 311