2017 CHEVROLET EXPRESS CARGO VAN check engine

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/2/16
114 Instruments and Controls
conditioning compressor turns backon. You can continue to drive thevehicle.
If this message continues to appear,have the system repaired by yourdealer as soon as possible to avoiddamage to the engine.
ENGINE OVERHEATED IDLE
ENGINE
This message displays when theengine coolant temperature is toohot. Stop and allow the vehicle toidle until it cools down. SeeEngineCoolant Temperature Gauge098.
ENGINE OVERHEATED STOP
ENGINE
This message displays and a chimesounds if the engine cooling systemreaches unsafe temperatures foroperation. Stop and turn off thevehicle as soon as it is safe to do soto avoid severe damage. Thismessage clears when the enginehas cooled to a safe operatingtemperature.
Engine Oil Messages
CHANGE ENGINE OIL SOON
This message displays when theengine oil needs to be changed.When you change the engine oil, besure to reset the CHANGE ENGINEOIL SOON message. SeeEngineOil Life System0221forinformation on how to reset themessage. SeeEngine Oil0219andMaintenance Schedule0297.
ENGINE OIL LOW ADD OIL
If the vehicle has an oil level sensor,this message displays if the oil levelin the vehicle is low. Check the oillevel and correct it as necessary.Yo u m a y n e e d t o l e t t h e v e h i c l e c o o lor warm up and cycle the ignition tobe sure this message clears. SeeEngine Oil0219.
OIL PRESSURE LOW STOP
ENGINE
This message displays if low oilpressure levels occur. Stop thevehicle as soon as safely possibleand do not operate it until the causeof the low oil pressure has been
corrected. Check the oil as soon aspossible and have the vehicleserviced by your dealer. SeeEngineOil0219.
Engine Power Messages
ENGINE POWER IS REDUCED
This message displays and a chimesounds when the cooling systemtemperature gets too hot and theengine further enters the enginecoolant protection mode. SeeEngine Overheating0230forfurther information.
This message also displays whenthe engine power is reduced.Reduced engine power can affectthe vehicle's ability to accelerate.If this message is on, but there is noreduction in performance, proceedto your destination. Theperformance may be reduced thenext time the vehicle is driven. Thevehicle may be driven at a reducedspeed while this message is on, butacceleration and speed may bereduced. Anytime this message

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/2/16
Instruments and Controls 115
stays on, the vehicle should betaken to your dealer for service assoon as possible.
Fuel System Messages
FUEL LEVEL LOW
This message displays and a chimesounds if the fuel level is low. Refuelas soon as possible. SeeFuelGauge096andFuel0198formore information.
TIGHTEN GAS CAP
This message may display alongwith the check engine light on theinstrument cluster if the fuel cap isnot tightened properly. SeeMalfunction Indicator Lamp (CheckEngine Light)0102.Reinstallthefuel cap fully. SeeFilling the Tank0200.Thediagnosticsystemcandetermine if the fuel cap has beenleft off or improperly installed.Alooseormissingfuelcapallowsfuel to evaporate into theatmosphere. A few driving trips withthe cap properly installed shouldturn this light and message off.
Key and Lock Messages
REPLACE BATTERY IN
REMOTE KEY
This message displays if a RemoteKeyless Entry (RKE) transmitterbattery is low. The battery needs tobe replaced in the transmitter. See“Battery Replacement”underRemote Keyless Entry (RKE)System Operation025.
Lamp Messages
AUTOMATIC LIGHT
CONTROL OFF
This message displays when theautomatic headlamps are turned off.SeeExterior Lamp Controls0125.
AUTOMATIC LIGHT
CONTROL ON
This message displays when theautomatic headlamps are turned on.SeeExterior Lamp Controls0125.
TURN SIGNAL ON
This message displays and a chimesounds if a turn signal is left on for1.2 km (0.75 mi). Move the turnsignal lever to the off position.
Object Detection System
Messages
PARK ASST BLOCKED SEE
OWNERS MANUAL
This message displays if there issomething interfering with the RearParking Assist (RPA) system. SeeParking Assist0197.
PARK ASSIST OFF
After the vehicle has been started,this message displays to remind thedriver that the Rear Parking Assist(RPA) system has been turned off.Press the set/reset button or the tripodometer reset stem toacknowledge this message andclear it from the DIC display. To turnthe RPA system back on, seeParking Assist0197.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/2/16
Instruments and Controls 117
.The message could display if thestability system takes longerthan usual to complete itsdiagnostic checks due to drivingconditions.
.The message displays if anengine or vehicle relatedproblem has been detected andthe vehicle needs service. Seeyour dealer.
The message turns off as soon asthe conditions that caused themessage to be displayed are nolonger present.
Airbag System Messages
SERVICE AIRBAG
This message displays if there is aproblem with the airbag system.Ta k e t h e v e h i c l e t o y o u r d e a l e r f o rservice.
Security Messages
SERVICE THEFT DETERRENT
SYSTEM
This message displays when thereis a problem with the theft-deterrentsystem. The vehicle may or may notrestart so you may want to take thevehicle to your dealer before turningoff the engine. SeeImmobilizerOperation033for more information.
WAIT TO START
This message displays briefly whenthe theft-deterrent system hasinitially found incorrect conditionswithin the vehicle and is making adouble check. If your vehicle doesnot start soon after, try to start itagain. If it still does not start, haveyour vehicle serviced by yourdealer.
Service Vehicle Messages
SERVICE A/C SYSTEM
This message displays when theelectronic sensors that control theair conditioning and heatingsystems are no longer working.
Have the climate control systemserviced by your dealer if you noticeadropinheatingandairconditioning efficiency.
SERVICE VEHICLE SOON
This message displays when anon-emissions related malfunctionoccurs. Have the vehicle servicedby your dealer as soon as possible.
STARTING DISABLED
SERVICE THROTTLE
This message displays if the startingof the engine is disabled due to theelectronic throttle control system.Have the vehicle serviced by yourdealer immediately.
This message only appears whilethe ignition is in ON/RUN, and willnot disappear until the problem isresolved.
This message cannot beacknowledged.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/6/16
Driving and Operating 169
.Keep the windshield washer fluidreservoir filled.
.Have good tires with propertread depth. SeeTires0252.
.Turn off cruise control.
Hill and Mountain Roads
Driving on steep hills or throughmountains is different than drivingon flat or rolling terrain. Tips include:
.Keep the vehicle serviced and ingood shape.
.Check all fluid levels and brakes,tires, cooling system, andtransmission.
.Shift to a lower gear when goingdown steep or long hills.
{Warning
Using the brakes to slow the
vehicle on a long downhill slope
can cause brake overheating, can
reduce brake performance, and
could result in a loss of braking.
(Continued)
Warning (Continued)
Shift the transmission to a lower
gear to let the engine assist the
brakes on a steep downhill slope.
{Warning
Coasting downhill in N (Neutral)
or with the ignition off is
dangerous. This can cause
overheating of the brakes and
loss of steering. Always have the
engine running and the vehicle
in gear.
.Drive at speeds that keep thevehicle in its own lane. Do notswing wide or cross thecenter line.
.Be alert on top of hills;something could be in your lane(e.g., stalled car, accident).
.Pay attention to special roadsigns (e.g., falling rocks area,winding roads, long grades,passing or no-passing zones)and take appropriate action.
Winter Driving
Driving on Snow or Ice
Snow or ice between the tires andthe road creates less traction orgrip, so drive carefully. Wet ice canoccur at about 0 °C (32 °F) whenfreezing rain begins to fall. Avoiddriving on wet ice or in freezing rainuntil roads can be treated.
For slippery road driving:
.Accelerate gently. Acceleratingtoo quickly causes the wheels tospin and makes the surfaceunder the tires slick.
.Turn on Traction Control. SeeTr a c t i o n C o n t r o l / E l e c t r o n i cStability Control0190.
.Antilock Brake System (ABS)improves vehicle stability duringhard stops, but the brakesshould be applied sooner than

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/6/16
Driving and Operating 179
When the fast idle is active, theDriver Information Center (DIC) willdisplay FAST IDLE ON.
One of the following actions will turnoff the fast idle:
.Pressing the brake.
.Selecting the cruise controlcancel button.
.Releasing the parking brake.
.Moving the transmission shiftlever out of P (Park) orN(Neutral).
.Selecting the cruise control on/off button when it waspreviously on.
.Pressing the cruise control SET-button a second time.
.Pressing the accelerator morethan one-quarter of theway down.
.Turning the ignition switch to theLOCK/OFF position.
Engine Heater
If the vehicle has a diesel engine,see the Duramax dieselsupplement.
The engine coolant heater canprovide easier starting and betterfuel economy during enginewarm-up in cold weather conditionsat or below✓18 °C (0 °F). Vehicleswith an engine coolant heatershould be plugged in at least fourhours before starting. An internalthermostat in the plug end of thecord may exist which will preventengine coolant heater operation attemperatures above✓18 °C (0 °F).
To Use the Engine Coolant
Heater
1. Turn off the engine.
2. Open the hood and unwrap theelectrical cord.
The cord for the engine coolantheater is on the driver side ofthe engine compartment and isattached to the hose for thepower steering reservoir.
Check the heater cord fordamage. If it is damaged, donot use it. See your dealer forareplacement.Inspectthecord for damage yearly.
3. Plug it into a normal, grounded11 0 - v o l t A C o u t l e t .
{Warning
Improper use of the heater cord
or an extension cord can damage
the cord and may result in
overheating and fire.
.Plug the cord into athree-prong electrical utilityreceptacle that is protectedby a ground fault detectionfunction. An ungroundedoutlet could cause anelectric shock.
.Use a weatherproof,heavy-duty, 15 amp-ratedextension cord if needed.Failure to use therecommended extensioncord in good operating
(Continued)

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/6/16
188 Driving and Operating
Tow/Haul Mode Grade Braking
To w / H a u l M o d e G r a d e B r a k i n g i sonly enabled while the Tow/HaulMode is selected and the vehicle isnot in the Range Selection Mode.See“To w / H a u l M o d e”listedpreviously andManual Mode0186.To w / H a u l M o d e G r a d e B r a k i n gassists in maintaining desiredvehicle speeds when driving ondownhill grades by using the engineand transmission to slow thevehicle.
To d i s a b l e o r e n a b l e To w / H a u l M o d eGrade Braking within the currentignition key cycle, press and holdthe Tow/Haul button forthree seconds. A DIC message willbe displayed. SeeTr a n s m i s s i o nMessages011 8.
SeeTo w i n g E q u i p m e n t0210.
For other forms of grade braking,seeAutomatic Transmission0183andCruise Control0192.
Brakes
Antilock Brake
System (ABS)
This vehicle has an Antilock BrakeSystem (ABS), an advancedelectronic braking system that helpsprevent a braking skid.
When the vehicle begins to driveaway, ABS checks itself.Amomentarymotororclickingnoisemay be heard while this test is goingon, and it may even be noticed thatthe brake pedal moves a little. Thisis normal.
If there is a problem with ABS, thiswarning light stays on. SeeAntilockBrake System (ABS) WarningLight0104.
If driving safely on a wet road and itbecomes necessary to slam on thebrakes and continue braking toavoid a sudden obstacle, acomputer senses the wheels areslowing down. If one of the wheelsis about to stop rolling, the computerwill separately work the brakes ateach wheel.
ABS can change the brake pressureto each wheel, as required, fasterthan any driver could. This can helpyou steer around the obstacle whilebraking hard.
As the brakes are applied, thecomputer keeps receiving updateson wheel speed and controlsbraking pressure accordingly.
Remember: ABS does not changethe time needed to get a foot up tothe brake pedal or always decreasestopping distance. If you get tooclose to the vehicle in front of you,there will not be enough time toapply the brakes if that vehiclesuddenly slows or stops. Alwaysleave enough room up ahead tostop, even with ABS.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/6/16
194 Driving and Operating
.Vehicles with a 6-speedautomatic transmission haveCruise Grade Braking to helpmaintain driver selected speed.
Cruise Grade Braking is enabledwhen the vehicle is started andcruise control is active. It is notenabled in Range Selection Mode.It assists in maintaining driverselected speed when driving ondownhill grades by using the engineand transmission to slow thevehicle.
To d i s a b l e a n d e n a b l e C r u i s e G r a d eBraking for the current ignition keycycle, press and hold the Tow/Haulbutton for three seconds. A DICmessage displays. SeeTr a n s m i s s i o n M e s s a g e s011 8.
When the brakes are applied thecruise control is disengaged.
Ending Cruise Control
There are four ways to end cruisecontrol:
.Step lightly on the brake pedal.
.Press[.
.Shift the transmission toN(Neutral).
.To t u r n o f f c r u i s e c o n t r o l ,
pressI.
Erasing Speed Memory
The cruise control set speed is
erased from memory ifIis
pressed or if the vehicle isturned off.
Driver Assistance
Systems
Rear Vision
Camera (RVC)
If equipped, the RVC system isdesigned to help the driver whenbacking up by displaying a view ofthe area behind the vehicle.
{Warning
The camera(s) do not display
children, pedestrians, bicyclists,
crossing traffic, animals, or any
other object outside of the
cameras’field of view, below the
bumper, or under the vehicle.
Shown distances may be different
from actual distances. Do not
drive or park the vehicle using
only these camera(s). Always
check behind and around the
vehicle before driving. Failure to
use proper care may result in
injury, death, or vehicle damage.

Chevrolet Express Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-9967827) - 2017 - crc - 5/6/16
Driving and Operating 199
Caution (Continued)
.Fuel containing metals suchas methylcyclopentadienylmanganese tricarbonyl(MMT), which can damagethe emissions controlsystem and spark plugs.
.Fuel with a posted octanerating of less than therecommended fuel. Usingthis fuel will lower fueleconomy and performance,and may decrease the life ofthe emissions catalyst.
California Fuel
Requirements
If the vehicle is certified to meetCalifornia Emissions Standards, it isdesigned to operate on fuels thatmeet California specifications. Seethe underhood emission controllabel. If this fuel is not available instates adopting California EmissionsStandards, the vehicle will operatesatisfactorily on fuels meetingfederal specifications, but emission
control system performance may beaffected. The malfunction indicatorlamp could turn on and the vehiclemay not pass a smog-check test.SeeMalfunction Indicator Lamp(Check Engine Light)0102.Ifthisoccurs, return to your authorizeddealer for diagnosis. If it isdetermined that the condition iscaused by the type of fuel used,repairs may not be covered by thevehicle warranty.
Fuels in Foreign
Countries
The U.S., Canada, and Mexico postfuel octane ratings in anti-knockindex (AKI). For fuel not to use in aforeign country, see“ProhibitedFuels”inFuel0198.
Fuel Additives
To k e e p f u e l s y s t e m s c l e a n , T O PTIER Detergent Gasoline isrecommended. SeeFuel0198.
If TOP TIER Detergent Gasoline isnot available, one bottle of GM FuelSystem Treatment Cleaner added tothe fuel tank at every engine oil
change, can help. GM Fuel SystemTreatment Cleaner is the onlygasoline additive recommended byGeneral Motors. It is available atyour dealer.
If your vehicle is able to use E85 orFlexFuel, GM Fuel SystemTreatment Cleaner - FlexFuel is theonly recommended additive for use.Do not use any other additives withan E85 or FlexFuel vehicle. SeeE85 or FlexFuel0199.
E85 or FlexFuel
Vehicles with a yellow fuel cap canuse either unleaded gasoline or fuelcontaining up to 85% ethanol (E85).All other vehicles should use onlythe unleaded gasoline as describedinFuel0198.
The use of E85 or FlexFuel isencouraged when the vehicle isdesigned to use it. E85 or FlexFuelis made from renewable sources.
To h e l p l o c a t e f u e l s t a t i o n s t h a tcarry E85 or FlexFuel, the U.S.Department of Energy has an