ignition CHEVROLET EXPRESS 2018 Repair Manual

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Vehicle Care 251
FusesUsage
46 AC DC inverter
47 Cooling fan –low
51 Left high-beam headlamp
52 Right high-beam headlamp
53 Left low-beam headlamp
54 Right low-beam headlamp
55 Wipers
56 Canister vent solenoid
58 Body control module 2
59 Body control module 1
61 Engine oil solenoid
62 O2 sensor 2
63 –
64 Mass air flow/ Canister vent Fuses
Usage
65 Ignition/Injectors –odd
66 Daytime running lamps 2
67 Daytime running lamps 1
68 Auxiliary stoplamps
69 External power for trailer
70 Upfitter stoplamps
71 Fuel heater/Flex fuel sensor
72 Body control module 6
73 Lighter/Data link connector
74 Front blower
75 V6 fuel injectors
76 –
77 O2 sensor 1
78 Engine control module/Powertrain Fuses
Usage
79 Ignition/Injectors –even
Relays Usage
15 Run/Crank
37 –
38 Fuel pump
39 Crank
40 A/C compressor
48 –
49 Powertrain
50 –
57 Cooling fan –low
60 Cooling fan control

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
254 Vehicle Care
Mini-Fuse UsageF11 –/ OnStar
F12 ECM batt
F13 HVAC 2
F14 HVAC 1
F15 –
F16 Upfitter 1
F17 Exterior rearview heated mirrors
F18 Rear window defogger
F19 Compass
F20 Radio/Chime/ SiriusXM satellite
radio
F21 Remote function actuator/Tire
pressure monitor
F22 Ignition switch/ Discrete logic
ignition sensor
F23 Instrument cluster
F24 – Mini-Fuse Usage
F25 HVAC control
F26 Auxiliary/Trailer reverse lamps
F27 Reverse lamps
F28 Upfitter 2/Reading lamps
F29 Rear blower
F30 Upfitter/Courtesy lamps
F31 Front door lock
F32 Rear door lock
F33 Cargo door unlock
F34 Passenger door unlock
F35 Rear passenger door unlock
F36 Driver door lock
F37 Empty
F38 – Relays Usage
K1 Run
K2 –
K3 Parking lamps
K4 Upfitter 2
K5 Rear defogger
K6 Retained accessory power
Circuit
Breaker Usage
CB1 Power seats
CB2 Power windows

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
266 Vehicle Care
each ignition cycle until the tires are
inflated to the correct inflation
pressure. If the vehicle has DIC
buttons, tire pressure levels can be
viewed. For additional information
and details about the DIC operation
and displays, seeDriver Information
Center (DIC) 0111.
The low tire pressure warning light
may come on in cool weather when
the vehicle is first started, and then
turn off as the vehicle is driven. This
could be an early indicator that the
air pressure is getting low and
needs to be inflated to the proper
pressure.
A Tire and Loading Information label
shows the size of the original
equipment tires and the correct
inflation pressure for the tires when
they are cold. See Vehicle Load
Limits 0169, for an example of the
Tire and Loading Information label
and its location. Also see Tire
Pressure 0263.
The TPMS can warn about a low
tire pressure condition but it does
not replace normal tire maintenance. See
Tire Inspection
0 268, Tire Rotation 0268 andTires
0 255.
Caution
Tire sealant materials are not all
the same. A non-approved tire
sealant could damage the TPMS
sensors. TPMS sensor damage
caused by using an incorrect tire
sealant is not covered by the
vehicle warranty. Always use only
the GM approved tire sealant
available through your dealer or
included in the vehicle.
TPMS Malfunction Light and
Message
The TPMS will not function properly
if one or more of the TPMS sensors
are missing or inoperable. When the
system detects a malfunction, the
low tire pressure warning light
flashes for about one minute and
then stays on for the remainder of
the ignition cycle. A DIC warning
message also displays. The malfunction light and DIC warning
message come on at each ignition
cycle until the problem is corrected.
Some of the conditions that can
cause these to come on are:
.
One of the road tires has been
replaced with the spare tire. The
spare tire does not have a
TPMS sensor. The malfunction
light and the DIC message
should go off after the road tire
is replaced and the sensor
matching process is performed
successfully. See "TPMS Sensor
Matching Process" later in this
section.
. The TPMS sensor matching
process was not done or not
completed successfully after
rotating the tires. The
malfunction light and the DIC
message should go off after
successfully completing the
sensor matching process. See
"TPMS Sensor Matching
Process" later in this section.
. One or more TPMS sensors are
missing or damaged. The
malfunction light and the DIC

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Vehicle Care 267
message should go off when the
TPMS sensors are installed and
the sensor matching process is
performed successfully. See
your dealer for service.
. Replacement tires or wheels do
not match the original equipment
tires or wheels. Tires and wheels
other than those recommended
could prevent the TPMS from
functioning properly. See Buying
New Tires 0271.
. Operating electronic devices or
being near facilities using radio
wave frequencies similar to the
TPMS could cause the TPMS
sensors to malfunction.
If the TPMS is not functioning
properly, it cannot detect or signal a
low tire pressure condition. See
your dealer for service if the TPMS
malfunction light and DIC message
come on and stay on.
TPMS Sensor Matching
Process
Each TPMS sensor has a unique
identification code. The identification
code needs to be matched to a new tire/wheel position after rotating the
vehicle’s tires or replacing one or
more of the TPMS sensors. Also,
the TPMS sensor matching process
should be performed after replacing
a spare tire with a road tire
containing the TPMS sensor. The
malfunction light and the DIC
message should go off at the next
ignition cycle. The sensors are
matched to the tire/wheel positions,
using a TPMS relearn tool, in the
following order: driver side front tire,
passenger side front tire, passenger
side rear tire, and driver side rear.
See your dealer for service or to
purchase a relearn tool. A TPMS
relearn tool can also be purchased.
See Tire Pressure Monitor Sensor
Activation Tool at
www.gmtoolsandequipment.com or
call 1-800-GM TOOLS
(1-800-468-6657).
There are two minutes to match the
first tire/wheel position, and
five minutes overall to match all four
tire/wheel positions. If it takes
longer, the matching process stops
and must be restarted.
The TPMS sensor matching
process is:
1. Set the parking brake.
2. Turn the ignition on without starting the vehicle. See
Ignition Positions 0174.
3. Press the Remote Keyless Entry (RKE) transmitter's
Q
andKbuttons at the same
time for approximately
five seconds. The horn sounds
twice to signal the receiver is in
relearn mode and TIRE
LEARNING ACTIVE message
displays on the DIC screen.
If the vehicle does not have
RKE, press the Driver
Information Center (DIC)
vehicle information button until
the PRESS VTO RELEARN
TIRE POSITIONS message
displays. The horn sounds
twice to signal the receiver is in
relearn mode and TIRE
LEARNING ACTIVE message
displays on the DIC screen.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Vehicle Care 287
ground connection you do not
want. You would not be able to
start your vehicle, and the bad
grounding could damage the
electrical systems.
To avoid the possibility of the
vehicles rolling, set the parking
brake firmly on both vehicles
involved in the jump start
procedure. Put an automatic
transmission in P (Park) or a
manual transmission in Neutral
before setting the parking
brake.
Caution
If any accessories are left on or
plugged in during the jump
starting procedure, they could be
damaged. The repairs would not
be covered by the vehicle
warranty. Whenever possible, turn
off or unplug all accessories on
either vehicle when jump starting.
3. Turn the ignition off on both vehicles. Unplug unnecessary
accessories plugged into the cigarette lighter or the
accessory power outlet. Turn
off the radio and all lamps that
are not needed. This will avoid
sparks and help save both
batteries. And it could save the
radio!
4. Open the hoods and locate the positive (+) and negative (−)
terminal locations of the other
vehicle.
On your van, use the unpainted
radio antenna bracket as a
remote negative (−) terminal.
{Warning
Using a match near a battery can
cause battery gas to explode.
People have been hurt doing this,
and some have been blinded.
Use a flashlight if you need more
light.
Battery fluid contains acid that
can burn you. Do not get it on
you. If you accidentally get it in
(Continued)
Warning (Continued)
your eyes or on your skin, flush
the place with water and get
medical help immediately.
{Warning
Fans or other moving engine
parts can injure you badly. Keep
your hands away from moving
parts once the engine is running.
5. Check that the jumper cables do not have loose or missing
insulation. If they do, you could
get a shock. The vehicles
could be damaged too.
Before you connect the cables,
here are some basic things you
should know. Positive (+) will
go to positive (+) or to a remote
positive (+) terminal if the
vehicle has one. Negative (−)
will go to an unpainted metal
part or to a remote negative (−)
terminal if the vehicle has one.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Vehicle Care 291
Dinghy Towing
Caution
If the vehicle is towed with all four
wheels on the ground, the
drivetrain components could be
damaged. The repairs would not
be covered by the vehicle
warranty. Do not tow the vehicle
with all four wheels on the
ground.
The vehicle should not be towed
with all four wheels on the ground.
Dolly Towing
Rear Towing (Rear Wheels Off the
Ground)
To tow the vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly
manufacturer's instructions.
2. Drive the rear wheels onto the dolly.
3. Firmly set the parking brake. See Parking Brake 0187.
4. Put the transmission in P (Park). 5. Secure the vehicle to the dolly
following the manufacturer's
instructions.
6. Use an adequate clamping device designed for towing to
ensure that the front wheels
are locked into the straight
position.
7. Turn the ignition to off.
If the tow vehicle will not be
started or driven for six weeks
or more, remove the battery
cable from the negative
terminal (post) of the battery to
prevent the battery from
draining while towing.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
304 Service and Maintenance
.Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of
wear. See Exterior Care 0292.
. Check restraint system
components. See Safety System
Check 055.
. Visually inspect fuel system for
damage or leaks.
. Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts.
. Lubricate body components. See
Exterior Care 0292.
. Check starter switch. See Starter
Switch Check 0241.
. Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function Check
0241.
. Check ignition transmission lock.
See Ignition Transmission Lock
Check 0242. .
Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 242.
. Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
. Visually inspect gas strut for
signs of wear, cracks, or other
damage. Check the hold open
ability of the strut. If the hold
open is low, service the gas
strut. See Gas Strut(s) 0243.
. Lubricate the steering linkage
(greasable joints). See Normal
and Severe Maintenance
Schedules. For severe
commercial use vehicles, see
Special Application Services
0307.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
334 OnStar
Security
If equipped, OnStar provides these
services:
.With Stolen Vehicle Assistance,
OnStar Advisors can use GPS to
pinpoint the vehicle and help
authorities quickly recover it.
. With Remote Ignition Block,
if equipped, OnStar can block
the engine from being restarted.
. With Stolen Vehicle Slowdown,
if equipped, OnStar can work
with law enforcement to
gradually slow the vehicle down.
Theft Alarm Notification
If equipped, if the doors are locked
and the vehicle alarm sounds, a
notification by text, e-mail, or phone
call will be sent. If the vehicle is
stolen, an OnStar Advisor can work
with authorities to recover the
vehicle.
Navigation
OnStar navigation requires a
specific OnStar service plan.
Press
Qto receive Turn-by-Turn
directions or have them sent to the
vehicle’s navigation screen,
if equipped.
Turn-by-Turn Navigation
1. PressQto connect to an
Advisor.
2. Request directions to be downloaded to the vehicle.
3. Follow the voice-guided commands.
Using Voice Commands
During a Planned Route
Functionality of the Voice Command
button may vary by vehicle and
region. For some vehicles, press
=
to open the OnStar app on the
infotainment display. For other
vehicles press
=as follows. Cancel Route
1. Press
=. System responds:
“OnStar ready,” then a tone.
2. Say “Cancel route.” System
responds: “Do you want to
cancel directions?”
3. Say “Yes.”System responds:
“OK, request completed, thank
you, goodbye.”
Route Preview
1. Press
=. System responds:
“OnStar ready,” then a tone.
2. Say “Route preview.” System
responds with the next three
maneuvers.
Repeat
1. Press
=. System responds:
“OnStar ready,” then a tone.
2. Say “Repeat.” System
responds with the last direction
given, then responds with
“OnStar ready,” then a tone.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
340 OnStar
change the OnStar PIN, contact an
OnStar Advisor by pressing
Qor
calling 1-888-4ONSTAR.
Warranty
OnStar equipment may be
warranted as part of the vehicle
warranty.
Languages
The vehicle can be programmed to
respond in multiple languages.
Press
Qand ask for an Advisor.
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 0212. Added electrical

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
11374212) - 2018 - crc - 2/2/18
Index 345
Automatic (cont'd)Transmission . . . . . . . . . . . . . . . . . 182
Transmission Fluid . . . . . . 223, 226
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . . . 185
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . 241
Auxiliary Devices . . . . . . . . . . . . . . . . . . . . . . . 143
Avoiding Untrusted Media Devices . . . . . . . . . . . . . . . . . . . . . . . 138
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 239
B
Battery Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . 127
Load Management . . . . . . . . . . . . 127
Power Protection . . . . . . . . . . . . . 127
Battery - North America . . . . 238, 286
Blade Replacement, Wiper . . . . . 242
Bluetooth Overview . . . . . . . . . . . . . . . . . . . . . 148
Brake
System Warning Light . . . . . . . . 107
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 236 Antilock . . . . . . . . . . . . . . . . . . . . . . . 186
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 188 Brakes (cont'd)
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Parking . . . . . . . . . . . . . . . . . . . . . . . 187
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 164
Break-In, New Vehicle . . . . . . . . . . 173
Bulb Replacement
Center High-MountedStoplamp (CHMSL) . . . . . . . . . 246
Front Turn Signal,
Sidemarker, and Parking
Lamps . . . . . . . . . . . . . . . . . . . . . . 245
Halogen Bulbs . . . . . . . . . . . . . . . . 244
Headlamp Aiming . . . . . . . . . . . . . 244
Headlamps . . . . . . . . . . . . . . . . . . . 244
License Plate Lamps . . . . . . . . . 247
Taillamps . . . . . . . . . . . . . . . . . . . . . 245
Buying New Tires . . . . . . . . . . . . . . . 271
C
Calibration . . . . . . . . . . . . . . . . . . . . . . . 93
California Fuel Requirements . . . . . . . . . . . 198
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . 215
California Proposition
65 Warning . . . . . . . . . .214, 238, 286, Back CoverCamera
Rear Vision (RVC) . . . . . . . . . . . . 193
Canadian Vehicle Owners . . . . . . . . 2
Capacities and Specifications . . . . . . . . . . . . . . . . . 315
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 181
Winter Driving . . . . . . . . . . . . . . . . 167
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . . . 88
Cargo Door Relocking . . . . . . . . . . . 30
Caution, Danger, and Warning . . . . 2
CD Player . . . . . . . . . . . . . . . . . . . . . . 138
Center High-Mounted
Stoplamp (CHMSL) . . . . . . . . . . . 246
Chains, Tire . . . . . . . . . . . . . . . . . . . . 276
Charging System Light . . . . . . . . . 104
Check
Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 105
Ignition Transmission Lock . . . 242
Child Restraints Infants and Young Children . . . . . 70
Lower Anchors and Tethersfor Children . . . . . . . . . . . . . . . . . . . 75
Older Children . . . . . . . . . . . . . . . . . . 68
Securing . . . . . . . . . . . . . . . . . . . . 82, 84
Systems . . . . . . . . . . . . . . . . . . . . . . . . 72