2020 CHEVROLET EXPRESS park assist

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Driving and Operating 211
controller should be installed by
your dealer or a qualified service
center.
If equipped, wiring provisions for an
aftermarket electric trailer brake
controller are included with the
vehicle as part of the trailer wiring
package. The harness contains the
following circuits:Electric Trailer
Brakes Dark Blue
Battery Feed Red/White
Brake Apply
Signal Light Blue
Ground Black
There are four blunt cut wires under
the floor carpeting in front of the
brake pedal. It will be necessary to
have a technician connect the
12-volt power to the engine
compartment fuse block.
Refer to the aftermarket electric
trailer brake controller owner's
manual to determine wire color
coding of the electric trailer brake controller. The wire colors on the
brake controller may be different
from the vehicle.
Trailer Lamps
Always check all trailer lamps are
working at the beginning of each
trip, and periodically on longer trips.
Turn Signals When Towing a
Trailer
When properly connected, the trailer
turn signals will illuminate to indicate
the vehicle is turning, changing
lanes, or stopping. When towing a
trailer, the arrows on the instrument
cluster will illuminate even if the
trailer is not properly connected or
the bulbs are burned out.
Tow/Haul Mode
Tow/Haul assists when pulling a
heavy trailer or a large or heavy
load. For instructions on how to
enter Tow/Haul mode, see
Tow/Haul
Mode 0175.
Tow/Haul Mode is designed to be
most effective when the vehicle and
trailer combined weight is at least 75% of the vehicle's Gross
Combined Weight Rating (GCWR).
See
“Trailer Weight ”under Trailer
Towing 0201.
Tow/Haul Mode is most useful when
towing a heavy trailer or carrying a
large or heavy load:
. through rolling terrain
. in stop-and-go traffic
. in busy parking lots
Operating the vehicle in Tow/Haul
Mode when lightly loaded or not
towing will not cause damage;
however, it is not recommended and
may result in unpleasant engine and
transmission driving characteristics
and reduced fuel economy.
Trailer Sway
Control (TSC)
Vehicles with StabiliTrak/Electronic
Stability Control (ESC) have a
Trailer Sway Control (TSC) feature.
Trailer sway is unintended
side-to-side motion of a trailer while
towing. If the vehicle is towing a
trailer and the TSC detects that

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Vehicle Care 235
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 089.
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 0325.
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.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
244 Vehicle Care
pressure from the regular brake
pedal. Do this until the vehicle is
held by the parking brake only.
. To check the P (Park)
mechanism's holding ability:
With the engine running, shift to
P (Park). Then release the
parking brake followed by the
regular brake.
Contact your dealer if service is
required.
Wiper Blade Replacement
Windshield wiper blades should be
inspected for wear and cracking.
See Maintenance Schedule 0305.
Replacement blades come in
different types and are removed in
different ways. For proper type and
length, see Maintenance
Replacement Parts 0314.
Caution
Allowing the wiper arm to touch
the windshield when no wiper
blade is installed could damage
the windshield. Any damage that
occurs would not be covered by
the vehicle warranty. Do not allow
the wiper arm to touch the
windshield.
1. Lift the wiper arm away from the windshield.
2. Push the release lever (2) todisengage the hook and push
the wiper arm (1) out of the
blade assembly (3). 3. Push the new blade assembly
securely on the wiper arm until
the release lever clicks into
place.
Windshield Replacement
Driver Assistance Systems
If the windshield needs to be
replaced and the vehicle is
equipped with a front camera sensor
for the Driver Assistance Systems, a
GM replacement windshield is
recommended. The replacement
windshield must be installed
according to GM specifications for
proper alignment. If it is not, these
systems may not work properly, they
may display messages, or they may
not work at all. See your dealer for
proper windshield replacement.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Vehicle Care 277
Warning (Continued)
underinflated or flat may cause a
blowout and a serious crash.
Never attempt to re-inflate a tire
that has been driven on while
severely underinflated or flat.
Have your dealer or an authorized
tire service center repair or
replace the flat tire as soon as
possible.
{Warning
Lifting a vehicle and getting under
it to do maintenance or repairs is
dangerous without the
appropriate safety equipment and
training. If a jack is provided with
the vehicle, it is designed only for
changing a flat tire. If it is used for
anything else, you or others could
be badly injured or killed if the
vehicle slips off the jack. If a jack
is provided with the vehicle, only
use it for changing a flat tire.If a tire goes flat, avoid further tire
and wheel damage by driving slowly
to a level place, well off the road,
if possible. Turn on the hazard
warning flashers. See
Hazard
Warning Flashers 0113.
{Warning
Changing a tire can be
dangerous. The vehicle can slip
off the jack and roll over or fall
causing injury or death. Find a
level place to change the tire. To
help prevent the vehicle from
moving:
1. Set the parking brake firmly.
2. Put an automatictransmission in P (Park) or a
manual transmission in
1 (First) or R (Reverse).
3. Turn off the engine and do not restart while the vehicle
is raised.
4. Do not allow passengers to remain in the vehicle.
(Continued)
Warning (Continued)
5. Place wheel blocks,if equipped, on both sides of
the tire at the opposite
corner of the tire being
changed.
When the vehicle has a flat tire (2),
use the following example as a
guide to assist in the placement of
the wheel blocks (1), if equipped.
1. Wheel Block (If Equipped)
2. Flat Tire
The following information explains
how to repair or change a tire.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
OnStar 339
Advisors are available in English,
Spanish, and French. Available
languages may vary by country.
Potential Issues
OnStar cannot perform Remote
Door Unlock or Stolen Vehicle
Assistance after the vehicle has
been off continuously for 10 days
without an ignition cycle. If the
vehicle has not been started for
10 days, OnStar can contact
Roadside Assistance or a locksmith
to help gain access to the vehicle.
Global Positioning
System (GPS)
.Obstruction of the GPS can
occur in a large city with tall
buildings; in parking garages;
around airports; in tunnels and
underpasses; or in an area with
very dense trees. If GPS signals
are not available, the OnStar
system should still operate to
call OnStar. However, OnStar
could have difficulty identifying
the exact location. .
In emergency situations, OnStar
can use the last stored GPS
location to send to emergency
responders.
A temporary loss of GPS can cause
loss of the ability to send a
Turn-by-Turn Navigation route. The
Advisor may give a verbal route or
may ask for a call back after the
vehicle is driven into an open area.
Cellular and GPS Antennas
Cellular reception is required for
OnStar to send remote signals to
the vehicle. Do not place items over
or near the antenna to prevent
blocking cellular and GPS signal
reception.
Unable to Connect to OnStar
Message
If there is limited cellular coverage
or the cellular network has reached
maximum capacity, this message
may come on. Press
Qto try the
call again or try again after driving a
few miles into another cellular area.
Vehicle and Power Issues
OnStar services require a vehicle
electrical system, wireless service,
and GPS satellite technologies to be
available and operating for features
to function properly. These systems
may not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment
The OnStar system is integrated
into the electrical architecture of the
vehicle. Do not add any electrical
equipment. See Add-On Electrical
Equipment 0213. Added electrical
equipment may interfere with the
operation of the OnStar system and
cause it to not operate.
Vehicle Software Updates
OnStar or GM may remotely deliver
software updates or changes to the
vehicle without further notice or
consent. These updates or changes
may enhance or maintain safety,
security, or the operation of the
vehicle or the vehicle systems.
Software updates or changes may
affect or erase data or settings that
are stored in the vehicle, such as

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Connected Services 343
devices. Manage data usage by
turning Wi-Fi on or off on your
mobile device, using the
myChevrolet mobile app, or by
contacting an OnStar Advisor. On
some vehicles, Wi-Fi can also be
managed from the Wi-Fi
Hotspot menu.
MyChevrolet Mobile App (If
Available)
Download the myChevrolet mobile
app to compatible Apple and
Android smartphones. Chevrolet
users can access the following
services from a smartphone:
.Remotely start/stop the vehicle,
if factory-equipped.
. Lock/unlock doors, if equipped
with automatic locks.
. Activate the horn and lamps.
. Check the vehicle’s fuel level, oil
life, or tire pressure,
if factory-equipped with the Tire
Pressure Monitor System.
. Send destinations to the vehicle.
. Locate the vehicle on a map
(U.S. market only). .
Turn the vehicle's Wi-Fi hotspot
on/off, manage settings, and
monitor data consumption,
if equipped.
. Locate a dealer and schedule
service.
. Request roadside assistance.
. Set a parking reminder with pin
drop, take a photo, make a note,
and set a timer.
. Connect with Chevrolet on social
media.
Features are subject to change. For
myChevrolet mobile app information
and compatibility, see
my.chevrolet.com.
An active OnStar or connected
service plan may be required.
A compatible device,
factory-installed remote start, and
power locks are required. Data rates
apply. See www.onstar.com for
details and system limitations.
Remote Services
Contact an OnStar Advisor to
unlock the doors or sound the horn
and flash the lamps.
Marketplace
OnStar Advisors can provide offers
from restaurants and retailers on
your route, help locate hotels,
or book a room. These services
vary by market.
Diagnostics
By monitoring and reporting on the
vehicle's key systems, OnStar
Advanced Diagnostics, if equipped,
provides a way to keep up on
maintenance. Capabilities vary by
model. See www.onstar.com for
details and system limitations.
Features are subject to change. For
updates on feature capabilities, see
my.chevrolet.com. Message and
data rates may apply.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Index 345
Automatic (cont'd)Headlamp System . . . . . . . . . . . . .112
Transmission . . . . . . . . . . . . . . . . . 171
Transmission Fluid . . . . . . 225, 228
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . 174
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . 243
Auxiliary Devices . . . . . . . . . . . . . . . . . . . . . . . 131
Avoiding Untrusted Media Devices . . . . . . . . . . . . . . . . . . . . . . . 126
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 241
B
Battery Exterior Lighting Battery
Saver . . . . . . . . . . . . . . . . . . . . . . . .116
Load Management . . . . . . . . . . . . .115
Power Protection . . . . . . . . . . . . . .116
Battery - North America . . . . 240, 288
Blade Replacement, Wiper . . . . . 244
Bluetooth Overview . . . . . . . . . . . . . . . . . . . . . 136
Brake System Warning Light . . . . . . . . . . 94
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 238 Antilock . . . . . . . . . . . . . . . . . . . . . . . 176 Brakes (cont'd)
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 177
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Parking . . . . . . . . . . . . . . . . . . . . . . . 177
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 153
Break-In, New Vehicle . . . . . . . . . . 162
Bulb Replacement Center High-MountedStoplamp (CHMSL) . . . . . . . . . 247
Front Turn Signal, Sidemarker, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 245
Halogen Bulbs . . . . . . . . . . . . . . . . 245
Headlamp Aiming . . . . . . . . . . . . . 245
Headlamps . . . . . . . . . . . . . . . . . . . 245
License Plate Lamps . . . . . . . . . 247
Taillamps . . . . . . . . . . . . . . . . . . . . . 246
Buying New Tires . . . . . . . . . . . . . . . 271
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . 81
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . 216
California Proposition
65 Warning . . . . . . . . . .215, 240, 288,
Back CoverCamera
Rear Vision (RVC) . . . . . . . . . . . . 184
Canadian Vehicle Owners . . . . . . . . 2
Capacities and Specifications . . . . . . . . . . . . . . . . . 318
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 170
Winter Driving . . . . . . . . . . . . . . . . 156
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . 77
Cargo Door Relocking . . . . . . . . . . . 14
Caution, Danger, and Warning . . . . 2
CD Player . . . . . . . . . . . . . . . . . . . . . . 126
Center High-Mounted
Stoplamp (CHMSL) . . . . . . . . . . . 247
Chains, Tire . . . . . . . . . . . . . . . . . . . . 275
Charging System Light . . . . . . . . . . 92
Check
Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . . . 93
Ignition Transmission Lock . . . 243
Child Restraints Infants and Young Children . . . . . 57
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . 62
Older Children . . . . . . . . . . . . . . . . . . 55
Securing . . . . . . . . . . . . . . . . . . . . 70, 72
Systems . . . . . . . . . . . . . . . . . . . . . . . . 59

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
350 Index
Manual Mirrors . . . . . . . . . . . . . . . . . . 21
Manual Mode . . . . . . . . . . . . . . . . . . . 174
Manual Windows . . . . . . . . . . . . . . . . 23
MediaAvoiding Untrusted Devices . . 126
Messages Engine Power . . . . . . . . . . . . . . . . 104
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 104
Vehicle Speed . . . . . . . . . . . . . . . . 104
Mirrors Convex . . . . . . . . . . . . . . . . . . . . . . . . . 21
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 22
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 22
Manual . . . . . . . . . . . . . . . . . . . . . . . . . 21
Manual Rearview . . . . . . . . . . . . . . . 22
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Trailer Tow . . . . . . . . . . . . . . . . . . . . . . 21
Mirrors, Interior Rearview . . . . . . . . 22
Monitor System, Tire Pressure . . . . . . . . . . . . . . . . . . . . . . 264
Multi-band Antenna . . . . . . . . . . . . . 126
N
Navigation
Connected Services . . . . . . . . . . 341
New Vehicle Break-In . . . . . . . . . . . 162
Noise Control System . . . . . . . . . . 241
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . 87
Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 154
Oil Engine . . . . . . . . . . . . . . . . . . . . . . . . 222
Engine Oil Life System . . . . . . . 224
Engine Oil Pressure Gauge . . . . . 88
Pressure Light . . . . . . . . . . . . . . . . . . 97
Older Children, Restraints . . . . . . . 55
Online Owner Center . . . . . . . . . . . 324
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . 334
OnStar Additional Information . . . . . . . . . . . . . . . . . . . . 337
OnStar Emergency . . . . . . . . . . . . . 336
OnStar Overview . . . . . . . . . . . . . . . 335
OnStar Security . . . . . . . . . . . . . . . . 337
OnStar System . . . . . . . . . . . . . . . . . 136
Operation Infotainment System . . . . . . . . . . 121
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Overheating, Engine . . . . . . . . . . . . 235
Overview . . . . . . . . . . . . . . . . . . 118, 120
Instrument Panel . . . . . . . . . . . . . . . . 5
P
ParkShifting Out of . . . . . . . . . . . . . . . . 170
Park Assist . . . . . . . . . . . . . . . . . . . . . 185
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . 177
Brake and P (Park)Mechanism Check . . . . . . . . . . 243
Over Things That Burn . . . . . . . 170
Perchlorate Materials
Requirements, California . . . . . . 216
Personalization Vehicle . . . . . . . . . . . . . . . . . . . . . . . 105
Phone
Bluetooth . . . . . . . . . . . . . . . . . . . . . 136
Power Door Locks . . . . . . . . . . . . . . . . . . . . . 14
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Outlets . . . . . . . . . . . . . . . . . . . . . . . . . 83
Protection, Battery . . . . . . . . . . . . .116
Retained Accessory (RAP) . . . 167
Seat Adjustment . . . . . . . . . . . . . . . . 27
Steering Fluid . . . . . . . . . . . . . . . . . 237
Windows . . . . . . . . . . . . . . . . . . . . . . . 23
Pregnancy, Using Seat Belts . . . . 41
Privacy Vehicle Data Recording . . . . . . . 333