2015 CHEVROLET SUBURBAN engine overheat

Black plate (17,1)Chevrolet 2015i Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-8431502) - 2015 - crc - 1/12/15
Vehicle Care 10-17
Use a 50/50 mixture of clean,
drinkable water and DEX-COOL
coolant. If using this mixture,
nothing else needs to be added.
This mixture:
.Gives freezing protection down
to−37°C (−34°F), outside
temperature.
.Gives boiling protection up to
129°C (265°F), engine
temperature.
.Protects against rust and
corrosion.
.Will not damage aluminum parts.
.Helps keep the proper engine
temperature.
{Caution
If improper coolant mixture,
inhibitors, or additives are used in
the vehicle cooling system, the
engine could overheat and be
damaged. Too much water in the
(Continued)
Caution (Continued)
mixture can freeze and crack
engine cooling parts. The repairs
would not be covered by the
vehicle warranty. Use only the
proper mixture of engine coolant
for the cooling system. See
Recommended Fluids and
Lubricants on page 11-11.
Never dispose of engine coolant by
putting it in the trash, or by pouring
it on the ground, or into sewers,
streams, or bodies of water. Have
the coolant changed by an
authorized service center, familiar
with legal requirements regarding
used coolant disposal. This will help
protect the environment and your
health.
Checking Coolant
The coolant surge tank is in the
engine compartment on the
passenger side of the vehicle. See
Engine Compartment Overview on
page 10-6.
The vehicle must be on a level
surface when checking the coolant
level.
Check to see if coolant is visible in
the coolant surge tank. If the coolant
inside the coolant surge tank is
boiling, wait until it cools down. The
coolant level should be at or above
the FULL COLD mark. If it is not,
there may be a leak in the cooling
system.
If coolant is visible but the coolant
level is not at or above the FULL
COLD mark, see “How to Add
Coolant to the Coolant Surge Tank,”
following.

Black plate (18,1)Chevrolet 2015i Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-8431502) - 2015 - crc - 1/12/15
10-18 Vehicle Care
How to Add Coolant to the
Coolant Surge Tank
{Warning
You can be burned if you spill
coolant on hot engine parts.
Coolant contains ethylene glycol
and it will burn if the engine parts
are hot enough. Do not spill
coolant on a hot engine.
{Caution
This vehicle has a specific
coolant fill procedure. Failure to
follow this procedure could cause
the engine to overheat and be
severely damaged.
{Warning
Steam and scalding liquids from a
hot cooling system can blow out
and burn you badly. Never turn
the cap when the cooling system,
including the surge tank pressure
cap, is hot. Wait for the cooling
system and surge tank pressure
cap to cool.
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 with the proper mixture to the FULL
COLD mark.

Black plate (19,1)Chevrolet 2015i Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-8431502) - 2015 - crc - 1/12/15
Vehicle Care 10-19
4. With the coolant surge tankpressure cap off, start the
engine and let it run until the
engine coolant temperature
gauge indicates approximately
90°C (195°F).
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
possible engine damage may
occur. Be sure the cap is properly
and tightly secured.
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 on page 5-18. In addition, there are ENGINE
OVERHEATED STOP ENGINE,
ENGINE OVERHEATED IDLE
ENGINE, and ENGINE POWER IS
REDUCED messages in the Driver
Information Center (DIC). See
Engine Cooling System Messages
on page 5-37
andEngine Power
Messages on page 5-38.
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 and have
the vehicle serviced.

Black plate (20,1)Chevrolet 2015i Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-8431502) - 2015 - crc - 1/12/15
10-20 Vehicle Care
If Steam is Coming from the
Engine Compartment
{Warning
Steam from an overheated engine
can burn you badly, even if you
just open the hood. Stay away
from the engine if you see or hear
steam coming from it. Just turn it
off and get everyone away from
the vehicle until it cools down.
Wait until there is no sign of
steam or coolant before you open
the hood.
If you keep driving when the
engine is overheated, the liquids
in it can catch fire. You or others
could be badly burned. Stop the
engine if it overheats, and get out
of the vehicle until the engine
is 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; seeTrailer Towing
on page 9-76.
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 temperature overheat 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

Black plate (4,1)Chevrolet 2015i Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-8431502) - 2015 - crc - 1/12/15
i-4 INDEX
Drive Belt Routing, Engine . . . . . 12-3
DriverTeen . . . . . . . . . . . . . . . . . . . . . . . . . . 7-31
Driver Assistance Systems . . . . 9-57
Driver Information Center (DIC) . . . . . . . . . . . 5-29, 5-31
Driving
Assistance Systems . . . . . . . . . . 9-60
Characteristics andTowing Tips . . . . . . . . . . . . . . . . . 9-73
Defensive . . . . . . . . . . . . . . . . . . . . . . 9-3
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
For Better Fuel Economy . . . . . 1-27
Hill and Mountain Roads . . . . . . 9-11
If the Vehicle is Stuck . . . . . . . . . 9-13
Loss of Control . . . . . . . . . . . . . . . . 9-5
Off-Road . . . . . . . . . . . . . . . . . . . . . . 9-5
Off-Road Recovery . . . . . . . . . . . . 9-4
Vehicle Load Limits . . . . . . . . . . . 9-14
Wet Roads . . . . . . . . . . . . . . . . . . . 9-10
Winter . . . . . . . . . . . . . . . . . . . . . . . . 9-12
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 8-1E
E85 or FlexFuel . . . . . . . . . . . . . . . 9-70
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . 9-88
Electrical System Engine CompartmentFuse Block . . . . . . . . . . . . . . . . 10-36
Fuses . . . . . . . . . . . . . . . . . . . . . . 10-35
Instrument Panel Fuse Block . . . . . . . . . 10-40, 10-42
Overload . . . . . . . . . . . . . . . . . . . 10-35
Rear Compartment Fuse
Block . . . . . . . . . . . . . . . . . . . . . . 10-45
Emergency OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-2
Engine
Air Cleaner/Filter . . . . . . . . . . . 10-14
Check and Service EngineSoon Light . . . . . . . . . . . . . . . . . . 5-22
Compartment Overview . . . . . . . 10-6
Coolant . . . . . . . . . . . . . . . . . . . . . 10-16
Coolant Temperature
Gauge . . . . . . . . . . . . . . . . . . . . . . 5-18
Cooling System . . . . . . . . . . . . . 10-15
Cooling System Messages . . . 5-37
Drive Belt Routing . . . . . . . . . . . . 12-3 Engine (cont'd)
Exhaust . . . . . . . . . . . . . . . . . . . . . . 9-30
Fan . . . . . . . . . . . . . . . . . . . . . . . . . 10-21
Heater . . . . . . . . . . . . . . . . . . . . . . . . 9-26
Oil Life System . . . . . . . . . . . . . 10-10
Oil Messages . . . . . . . . . . . . . . . . . 5-38
Oil Pressure Gauge . . . . . . . . . . 5-17
Overheating . . . . . . . . . . . . . . . . 10-19
Power Messages . . . . . . . . . . . . . 5-38
Running While Parked . . . . . . . . 9-31
Starting . . . . . . . . . . . . . . . . . . . . . . . 9-24
Entry Lighting . . . . . . . . . . . . . . . . . . . 6-7
Equipment, Towing . . . . . . . . . . . . 9-81
Event Data Recorders . . . . . . . . 13-14
Exit Lighting . . . . . . . . . . . . . . . . . . . . 6-7
Extender, Safety Belt . . . . . . . . . . 3-28
Exterior Lamp Controls . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . 6-2
F
Fan Engine . . . . . . . . . . . . . . . . . . . . . . 10-21
Features Memory . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Black plate (9,1)Chevrolet 2015i Tahoe/Suburban Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-8431502) - 2015 - crc - 1/12/15
INDEX i-9
OnStar®System . . . . . . . . . . . . . . . 7-18
OnStar®Vehicle
Diagnostics . . . . . . . . . . . . . . . . . . 14-6
Ordering Service Publications . . . . . . . . .13-11
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Overheating, Engine . . . . . . . . . . 10-19
Overview, Infotainment System . . . . . . . . . . . . . . . . . . . . . . . . 7-2
P
ParkShifting Into . . . . . . . . . . . . . . . . . . . 9-27
Shifting Out of . . . . . . . . . . . . . . . . 9-29
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . 9-42
Brake and P (Park)Mechanism Check . . . . . . . . 10-29
Over Things That Burn . . . . . . . 9-29
Parking or Backing Assistance Systems . . . . . . . . . . 9-58
Passenger Airbag Status
Indicator . . . . . . . . . . . . . . . . . . . . . 5-20
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 8-7 Passenger Sensing System . . . 3-37
Perchlorate Materials
Requirements, California . . . . . 10-3
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-47
Phone Bluetooth . . . . . . . . . 7-19, 7-21, 7-25
Port USB . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
Power Door Locks . . . . . . . . . . . . . . . . . . . 2-17
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Outlets . . . . . . . . . . . . . . . . . . . . . . . . 5-9
Protection, Battery . . . . . . . . . . . . . 6-8
Retained Accessory (RAP) . . . 9-27
Seat Adjustment . . . . . . . . . . . . . . . 3-4
Windows . . . . . . . . . . . . . . . . . . . . . 2-33
Power Assist Steps . . . . . . . . . . . . 2-23
Pregnancy, Using Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Privacy
Vehicle Data Recording . . . . . 13-14
Program Courtesy Transportation . . . . . . 13-7 Proposition
65 Warning,
California . . . . . . . . . 10-2, 10-24, 10-79
R
Radio Frequency
Identification (RFID) . . . . . . . . . 13-12
Radio Frequency Statement . . . . . . . . . . . . . . . . . . . 13-12
Radios
AM-FM Radio . . . . . . . . . . . . . . . . . . 7-8
Reception . . . . . . . . . . . . . . . . . . . . 7-10
Satellite . . . . . . . . . . . . . . . . . . . . . . . . 7-9
Reading Lamps . . . . . . . . . . . . . . . . . 6-6
Rear Axle . . . . . . . . . . . . . . . . . . . . . 10-26
Locking . . . . . . . . . . . . . . . . . . . . . . . 9-46
Rear Climate Control System . . . 8-5
Rear Seats Heated . . . . . . . . . . . . . . . . . . . . . . . 3-10
Rear Side Window Antenna . . . 7-10
Rear Storage . . . . . . . . . . . . . . . . . . . 4-2
Rear Window Washer/Wiper . . . . 5-6
Rearview Mirrors . . . . . . . . . . . . . . 2-31 Automatic Dimming . . . . . . . . . . . 2-32
Reclining Seatbacks . . . . . . . . . . . . 3-5