2018 CHEVROLET EXPRESS coolant temperature

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Introduction 3
{Danger
Danger indicates a hazard with a
high level of risk which will result
in serious injury or death.
{Warning
Warning indicates a hazard that
could result in injury or death.
Caution
Caution indicates a hazard that
could result in property or vehicle
damage.
A circle with a slash through it is a
safety symbol which means“Do
Not,” “Do not do this,” or“Do not let
this happen.”
Symbols
The vehicle has components and
labels that use symbols instead of
text. Symbols are shown along with
the text describing the operation or
information relating to a specific
component, control, message,
gauge, or indicator.
M: Shown when the owner ’s
manual has additional instructions
or information.
*: Shown when the service
manual has additional instructions
or information.
0: Shown when there is more
information on another page —
“see page.” Vehicle Symbol Chart
Here are some additional symbols
that may be found on the vehicle
and what they mean. See the
features in this manual for
information.
9:
Airbag Readiness Light
#:Air Conditioning
!:Antilock Brake System (ABS)
$:Brake System Warning Light
":Charging System
I: Cruise Control
`:Do Not Puncture
^:Do Not Service
B:Engine Coolant Temperature
O:Exterior Lamps
_: Flame/Fire Prohibited
.:Fuel Gauge
+: Fuses
3:Headlamp High/Low-Beam
Changer
j: ISOFIX/LATCH System Child
Restraints

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Keys, Doors, and Windows 29
When the engine starts, the
parking lamps will turn on and
remain on while the engine is
running. The doors will be
locked.
The engine will continue to run
for 10 minutes. After
30 seconds, repeat the steps if
a 10-minute extension is
desired. Remote start can be
extended only once.
After entering the vehicle during a
remote start, turn the ignition on to
drive the vehicle.
A maximum of two remote starts or
a start with an extension are
allowed between ignition cycles.
If the remote start procedure is used
again before the first 10–minute
time frame has ended, the first
10 minutes will immediately expire
and the second 10–minute time
frame will start.
After the engine has been remote
started two times or a start with an
extension, the ignition must be turned on and then off before the
remote start procedure can be used
again.
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 ignition on and then off.
The remote vehicle start feature will
not operate if:
. The key is in the ignition.
. The hood is open.
. The hazard warning flashers
are on.
. There is an emission control
system malfunction. See
Malfunction Indicator Lamp
(Check Engine Light) 0105.
. The engine coolant temperature
is too high.
. The oil pressure is low. .
Two remote starts or a start with
an extension have already been
provided.
Door Locks
{Warning
.Passengers, especially
children, can easily open
the doors and fall out of a
moving vehicle. When a
door is locked, the handle
will not open it. 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.
. Young children who get into
unlocked vehicles may be
unable to get out. A child
can be overcome by
extreme heat and can suffer
(Continued)

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
90 Instruments and Controls
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . . 91
Steering Wheel Controls . . . . . . . 91
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Windshield Wiper/Washer . . . . . . 92
Compass . . . . . . . . . . . . . . . . . . . . . . 93
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Power Outlets . . . . . . . . . . . . . . . . . 95
Cigarette Lighter . . . . . . . . . . . . . . . 96
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . 97
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . 97
Instrument Cluster . . . . . . . . . . . . . 98
Speedometer . . . . . . . . . . . . . . . . . . 99
Odometer . . . . . . . . . . . . . . . . . . . . . . 99
Trip Odometer . . . . . . . . . . . . . . . . . 99
Fuel Gauge . . . . . . . . . . . . . . . . . . . . 99
Engine Oil Pressure Gauge . . . . . . . . . . . . . . . . . . . . . . 100
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 101
Voltmeter Gauge . . . . . . . . . . . . . 102 Seat Belt Reminders . . . . . . . . . 102
Airbag Readiness Light . . . . . . . 102
Airbag On-Off Light . . . . . . . . . . . 103
Charging System Light . . . . . . . 104
Malfunction Indicator Lamp
(Check Engine Light) . . . . . . . . 105
Brake System Warning Light . . . . . . . . . . . . . . . . . . . . . . . . 107
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . 107
Tow/Haul Mode Light . . . . . . . . . 108
StabiliTrak OFF Light . . . . . . . . . 108
Traction Control System (TCS)/ StabiliTrak Light . . . . . . . . . . . . . 108
Tire Pressure Light . . . . . . . . . . . 109
Engine Oil Pressure Light . . . . 109
Low Fuel Warning Light . . . . . . . 110
Security Light . . . . . . . . . . . . . . . . . 110
High-Beam On Light . . . . . . . . . . 110
Cruise Control Light . . . . . . . . . . 110
Information Displays
Driver Information Center (DIC) . . . . . . . . . . . . . . . . 111
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . 115
Engine Power Messages . . . . . 116
Vehicle Speed Messages . . . . . 116
Vehicle Personalization
Vehicle Personalization . . . . . . . 116

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Instruments and Controls 101
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.
Engine Coolant
Temperature Gauge
Metric
English
This gauge shows the engine
coolant temperature.
It also provides an indicator of how
hard the vehicle is working. During a
majority of the operation, the gauge
will read 100 °C (210 °F) or less.
If the vehicle is pulling a load or
going up hills, it is normal for the
temperature to fluctuate and
approach the 122 °C (250 °F) mark.
If the gauge reaches the 125 °C
(260 °F) mark, it indicates that the
cooling system is working beyond
its capacity.
See Engine Overheating 0233.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Driving and Operating 177
.Press and release the cruise
control SET- button. Engine
speed will be held at
approximately 1200 rpm.
When the fast idle is active, the
Driver Information Center (DIC) will
display FAST IDLE ON.
One of the following actions will turn
off the fast idle:
. Pressing the brake.
. Selecting the cruise control
cancel button.
. Releasing the parking brake.
. Moving the transmission shift
lever out of P (Park) or
N (Neutral).
. Selecting the cruise control on/
off button when it was
previously on.
. Pressing the cruise control SET-
button a second time.
. Pressing the accelerator more
than one-quarter of the
way down.
. Turning the ignition off.Retained Accessory
Power (RAP)
These vehicle accessories can be
used for up to 10 minutes after the
engine is turned off:
.Audio System
. Power Windows (if equipped)
These features will work when the
ignition is on or in ACC/
ACCESSORY. Once the ignition is
turned from on to off, power to the
radio and power windows will
continue to work 10 minutes or until
the driver door is opened.
Engine Coolant Heater
If the vehicle has a diesel engine,
see the Duramax diesel
supplement.
{Warning
Do not plug in the engine block
heater while the vehicle is parked
in a garage or under a carport. (Continued)
Warning (Continued)
Property damage or personal
injury may result. Always park the
vehicle in a clear open area away
from buildings or structures.
The engine coolant heater can
provide easier starting and better
fuel economy during engine
warm-up in cold weather conditions
at or below −18 °C (0 °F). Vehicles
with an engine coolant heater
should be plugged in at least four
hours before starting. An internal
thermostat in the plug end of the
cord may exist which will prevent
engine coolant heater operation at
temperatures above −18 °C (0 °F).
To Use the Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap the
electrical cord.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Vehicle Care 229
Cooling System
The cooling system allows the
engine to maintain the correct
working temperature.
4.3L V6 Engine
1. Radiator Pressure Cap
2. Coolant Recovery Tank
3. Engine Cooling Fan (Outof View)
6.0L V8 Engine
1. Radiator Pressure Cap
2. Coolant Recovery Tank
3. Engine Cooling Fan (Outof 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. This coolant is designed to
remain in the vehicle for 5 years or
240 000 km (150,000 mi), whichever
occurs first.
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 0233.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
230 Vehicle Care
What to Use
{Warning
Plain water, or other liquids such
as alcohol, can boil before the
proper coolant mixture will. With
plain water or the wrong mixture,
the engine could get too hot but
there would not be an overheat
warning. The engine could catch
fire and you or others could be
burned.
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
Do not use anything other than a
mix of DEX-COOL coolant that
meets GM Standard
GMW3420 and clean, drinkable
water. Anything else can cause
damage to the engine cooling
system and the vehicle, which
would not be covered by the
vehicle warranty.
Never dispose of engine coolant by
putting it in the trash, 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 vehicle must be on a level
surface when checking the coolant
level.
Check to see if coolant is visible in
the coolant recovery tank. If the
coolant inside the coolant recovery
tank is boiling, do not do anything
else until it cools down. If coolant is
visible but the coolant level is not at
or above the indicated mark, add a
50/50 mixture of clean, drinkable
water and DEX-COOL coolant at the
coolant recovery tank, but be sure
the cooling system is cool before
this is done.
The coolant recovery tank cap has
this symbol on it.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Vehicle Care 233
mixture through the filler neck
until the level reaches the base
of the filler neck.
8. Replace the pressure cap. At any time during this procedure
if coolant begins to flow out of
the filler neck, reinstall the
pressure cap.
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
If the vehicle has a diesel engine,
see the Duramax diesel
supplement.
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.
The vehicle has an indicator to warn
of engine overheating.
There is an engine coolant
temperature gauge on the vehicle's
instrument cluster. See Engine
Coolant Temperature Gauge 0101.
If the decision is made not to lift the
hood when this warning appears,
but instead get service help right
away, see Roadside Assistance
Program 0322.
If the decision is made to lift the
hood, make sure the vehicle is
parked on a level surface.
Then check to see if the engine
cooling fans are running. If the
engine is overheating, the fan should be running. If it is not, do not
continue to run the engine and have
the vehicle serviced.
See if the engine cooling fan speed
increases when idle speed is
doubled by pushing the accelerator
pedal down. If it does not, the
vehicle needs service. Turn off the
engine.
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
the cap when the cooling system,
including the pressure cap, is hot.
Wait for the cooling system and
pressure cap to cool.