check engine CHEVROLET EXPRESS 2020 Get To Know Guide

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Vehicle Care 289
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-
13882570) - 2020 - CRC - 11/1/19
298 Vehicle Care
Caution (Continued)
Damage could occur and the
repairs would not be covered by
the vehicle warranty.
Brake System
Visually inspect brake lines and
hoses for proper hook-up, binding,
leaks, cracks, chafing, etc. Inspect
disc brake pads for wear and rotors
for surface condition. Inspect drum
brake linings/shoes for wear or
cracks. Inspect all other brake parts.
Steering, Suspension, and
Chassis Components
Visually inspect steering,
suspension, and chassis
components for damaged, loose,
or missing parts or signs of wear at
least once a year.
Inspect power steering for proper
attachment, connections, binding,
leaks, cracks, chafing, etc.
Visually check constant velocity joint
boots and axle seals for leaks.Lubricate the upper and lower
control arm ball joints, at least every
other engine oil change.
Lubricate the tie rod ball joints, idler
arm pivot shaft bearings, idler arm
socket, and pitman arm socket, at
least every other engine oil change.
Caution
Lubrication of applicable steering/
suspension points should not be
done unless the temperature is
−12 °C (10 °F) or higher,
or damage could result.
Body Component Lubrication
Lubricate all key lock cylinders,
hood hinges, liftgate hinges, and the
fuel door hinge unless the
components are plastic. Applying
silicone grease on weatherstrips
with a clean cloth will make them
last longer, seal better, and not stick
or squeak.
Underbody Maintenance
At least twice a year, spring and fall,
use plain water to flush dirt and
debris from the vehicle's underbody.
Your dealer or an underbody car
washing system can do this. If not
removed, rust and corrosion can
develop.
Do not directly power wash the
transfer case and/or front/rear axle
output seals. High pressure water
can overcome the seals and
contaminate the fluid. Contaminated
fluid will decrease the life of the
transfer case and/or axles and
should be replaced.
Sheet Metal Damage
If the vehicle is damaged and
requires sheet metal repair or
replacement, make sure the body
repair shop applies anti-corrosion
material to parts repaired or
replaced to restore corrosion
protection.
Original manufacturer replacement
parts will provide the corrosion
protection while maintaining the
vehicle warranty.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Service and Maintenance 303
Service and
Maintenance
General Information
General Information . . . . . . . . . . 303
Maintenance Schedule
Maintenance Schedule . . . . . . . 305
Special Application Services
Special ApplicationServices . . . . . . . . . . . . . . . . . . . . 310
Additional Maintenance
and Care
Additional Maintenanceand Care . . . . . . . . . . . . . . . . . . . . 310
Recommended Fluids,
Lubricants, and Parts
Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 313
Maintenance Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . 314
Maintenance Records
Maintenance Records . . . . . . . . 316
General Information
This maintenance section applies to
vehicles with a gasoline engine. For
diesel engine vehicles, see
"Maintenance Schedule" in the
Duramax diesel supplement.
Your vehicle is an important
investment. This section describes
the required maintenance for the
vehicle. Follow this schedule to help
protect against major repair
expenses resulting from neglect or
inadequate maintenance. It may
also help to maintain the value of
the vehicle if it is sold. It is the
responsibility of the owner to have
all required maintenance performed.
Your dealer has trained technicians
who can perform required
maintenance using genuine
replacement parts. They have
up-to-date tools and equipment for
fast and accurate diagnostics. Many
dealers have extended evening and
Saturday hours, courtesy
transportation, and online
scheduling to assist with service
needs. Your dealer recognizes the
importance of providing
competitively priced maintenance
and repair services. With trained
technicians, the dealer is the place
for routine maintenance such as oil
changes and tire rotations and
additional maintenance items like
tires, brakes, batteries, and wiper
blades.
Caution
Damage caused by improper
maintenance can lead to costly
repairs and may not be covered
by the vehicle warranty.
Maintenance intervals, checks,
inspections, recommended fluids,
and lubricants are important to
keep the vehicle in good working
condition.
Do not have chemical flushes that
are not approved by GM
performed on the vehicle. The
use of flushes, solvents, cleaners,
or lubricants that are not
(Continued)

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Service and Maintenance 305
Maintenance
Schedule
Owner Checks and Services
Check the engine oil level. See
Engine Oil0222.
Once a Month
. Check the tire inflation
pressures, including the spare.
See Tire Pressure 0263.
. Inspect the tires for wear. See
Tire Inspection 0268.
. Check the windshield washer
fluid level. See Washer Fluid
0 237.
Engine Oil Change
When the CHANGE ENGINE OIL
SOON message displays, have the
engine oil and filter changed within
the next 1 000 km (600 mi). If driven
under the best conditions, the
engine oil life system may not
indicate the need for vehicle service
for up to a year. The engine oil and
filter must be changed at least once
a year and the oil life system must be reset. Your trained dealer
technician can perform this work.
If the engine oil life system is reset
accidentally, service the vehicle
within 5 000 km (3,000 mi) since the
last service. Reset the oil life
system when the oil is changed.
See
Engine Oil Life System 0224.
Extended Idle Use
When the vehicle is used in a way
that requires extended idle time,
one hour of use shall be deemed
the same as 53 km (33 mi). See
Driver Information Center (DIC) 099
for hourmeter.
Air Conditioning Desiccant
(Replace Every Seven Years)
The air conditioning system requires
maintenance every seven years.
This service requires replacement of
the desiccant to help the longevity
and efficient operation of the air
conditioning system. This service
can be complex. See your dealer.
Tire Rotation and Required
Services Every 12 000 km
(7,500 mi)
Rotate the tires, if recommended for
the vehicle, and perform the
following services. See Tire
Rotation 0268.
. Check engine oil level and oil
life percentage. If needed,
change engine oil and filter, and
reset oil life system. See Engine
Oil 0222 and
Engine Oil Life System 0224.
. Check engine coolant level. See
Cooling System 0230.
. Check windshield washer fluid
level. See Washer Fluid 0237.
. Check tire inflation pressures,
including the spare. See Tire
Pressure 0263.
. Inspect tire wear. See Tire
Inspection 0268.
. Visually check for fluid leaks.
. Inspect engine air cleaner filter.
See Engine Air Cleaner/Filter
0 229.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Service and Maintenance 307
Maintenance Schedule
Additional Required
Services - Normal12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires and perform Required Services.
Check engine oil level and oil life percentage.
Change engine oil and filter, if needed.
Lubricate the steering linkage.@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Inspect evaporative control system. (1)@ @@
Replace engine air cleaner filter. (2)@@@
Replace spark plugs. Inspect spark plug wires
and/or boots.@
Drain and fill engine cooling system. (3)@
Visually inspect accessory drive belts. (4)@
Replace brake fluid. (5)
Replace windshield wiper blades. (6)
@ @ @ @ @ @ @ @ @ @
Replace air conditioning desiccant. (7)
Footnotes—Maintenance
Schedule Additional Required
Services - Normal
(1) Visually check all fuel and vapor
lines and hoses for proper
attachment, connection, routing, and
condition. (2)
Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
See Engine Air Cleaner/Filter 0229. (3)
Or every five years, whichever
comes first. See Cooling System
0 230.
(4) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Service and Maintenance 309
Maintenance Schedule
Additional Required
Services - Severe12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi 180 000 km/112,500 mi
192 000 km/120,000 mi
204 000 km/127,500 mi
216 000 km/135,000 mi
228 000 km/142,500 mi
240 000 km/150,000 mi
Rotate tires and perform Required Services.
Check engine oil level and oil life percentage.
Change engine oil and filter, if needed.
Lubricate the steering linkage.@ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
Inspect evaporative control system. (1)@ @@
Replace engine air cleaner filter. (2)@@@
Change automatic transmission fluid and filter.@@@
Replace spark plugs. Inspect spark plug wires
and/or boots.@
Drain and fill engine cooling system. (3)@
Visually inspect accessory drive belts. (4)@
Replace brake fluid. (5)
Replace windshield wiper blades. (6)
@ @ @ @ @ @ @ @ @ @
Replace air conditioning desiccant. (7)
Footnotes—Maintenance
Schedule Additional Required
Services - Severe
(1) Visually check all fuel and vapor
lines and hoses for proper
attachment, connection, routing, and
condition. (2)
Or every four years, whichever
comes first. If driving in dusty
conditions, inspect the filter at each
oil change or more often as needed.
See Engine Air Cleaner/Filter 0229. (3)
Or every five years, whichever
comes first. See Cooling System
0 230.
(4) Or every 10 years, whichever
comes first. Inspect for fraying,
excessive cracking, or damage;
replace, if needed.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
310 Service and Maintenance
(5)Replace brake fluid every five
years. See Brake Fluid 0239.
(6) Or every 12 months, whichever
comes first. See Wiper Blade
Replacement 0244.
(7) Replace air conditioning
desiccant every seven years.Special Application
Services
. Vehicles with Dual Wheels:
Check dual wheel nut torque at
160, 1 600, and 10 000 km (100,
1,000, and 6,000 mi) of driving.
Repeat this service whenever a
tire/wheel is serviced or
removed.
. Severe Commercial Use
Vehicles Only: Lubricate chassis
components every oil change.
. Have underbody flushing service
performed. See “Underbody
Maintenance” inExterior Care
0 294.
Additional
Maintenance and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional
maintenance services may be
required.
It is recommended that your dealer
perform these services —their
trained dealer technicians know
your vehicle best. Your dealer can
also perform a thorough
assessment with a multi-point
inspection to recommend when your
vehicle may need attention.
The following list is intended to
explain the services and conditions
to look for that may indicate
services are required.
Battery
The 12-volt battery supplies power
to start the engine and operate any
additional electrical accessories.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Service and Maintenance 311
.To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of
cracking or splitting.
. Trained dealer technicians have
access to tools and equipment
to inspect the belts and
recommend adjustment or
replacement when necessary.
Brakes
Brakes stop the vehicle and are
crucial to safe driving.
. Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping. .
Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants 0313 for GM approved
fluids.
. Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi-point inspection, your
dealer can inspect the hoses and
advise if replacement is needed. Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.
Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
. With a multi-point inspection,
your dealer can check the lamps
and note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
. Signs of wear may include
steering wheel vibration, bounce/
sway while braking, longer
stopping distance, or uneven
tire wear.
. As part of the multi-point
inspection, trained dealer
technicians can visually inspect
the shocks and struts for signs

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
Technical Data 319
ApplicationCapacities
Metric English
Cutaway (Standard Tank) 124.9 L 33.0 gal
Passenger and Cargo 117.3 L 31.0 gal
* 4 039 mm (159 in) wheelbase or 4 496 mm (177 in) wheelbase only
Wheel Nut Torque 190 Y140 lb ft
All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this
manual. Recheck fluid level after filling.
Engine Specifications
Engine VIN CodeTransmission Spark Plug Gap
4.3L V6 (LV1) PAutomatic 0.95–1.10 mm (0.037–
0.043 in)
6.0L V8 (L96) GAutomatic 0.95–1.10 mm (0.037–
0.043 in)
6.0L V8 (LC8) (Capable of
Being Upfit for Gaseous Fuel) B
Automatic 0.95–1.10 mm (0.037–
0.043 in)
Spark plug gaps are preset by the manufacturer. Re-gapping the spark plug is not recommended and can damage
the spark plug.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13882570) - 2020 - CRC - 11/1/19
344 Index
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 216
Accessory Power . . . . . . . . . . . . . . . 167
Add-On Electrical Equipment . . . 213
Additional Information OnStar . . . . . . . . . . . . . . . . . . . . . . . 337
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . 310
Air Cleaner/Filter, Engine . . . . . . . 229
Air Conditioning . . . . . . . . . . . 144, 146
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 149
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 54
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 49
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 48
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 49
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 48
Where Are the Airbags? . . . . . . . . 46
Airbags
Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 54
Light On-Off . . . . . . . . . . . . . . . . . . . . 91
On-Off Light . . . . . . . . . . . . . . . . . . . . 91 Airbags (cont'd)
On-Off Switch . . . . . . . . . . . . . . . . . . 50
Readiness Light . . . . . . . . . . . . . . . . 90
Servicing Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . . 53
System Check . . . . . . . . . . . . . . . . . . 43
Alarm
Vehicle Security . . . . . . . . . . . . . . . . 19
Alert Side Blind Zone (SBZA) . . . . . . 188
All-Season Tires . . . . . . . . . . . . . . . . 256
AM-FM Radio . . . . . . . . . . . . . . . . . . . 123
Antenna Multi-band . . . . . . . . . . . . . . . . . . . . 126
Antilock Brake System (ABS) . . . 176 Warning Light . . . . . . . . . . . . . . . . . . . 95
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 294
Interior . . . . . . . . . . . . . . . . . . . . . . . . 299
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . 85
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . . 325
Audio Theft-Deterrent Feature . . . . . . . .118
Audio Players CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Automatic Door Locks . . . . . . . . . . . . . . . . . . . . . 14