2018 CHEVROLET LOW CAB FORWARD warning lights

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
12 In Brief
Instrument Panel (Driver Side)
1. Instrument Panel Light LevelControl. See Instrument Panel
Illumination Control 095.
2. Power Take Off (PTO) Main Switch. See Power Take-Off
(PTO) 0215.
3. Power Take Off (PTO) Engine Speed Control Switch. See
Power Take-Off (PTO) 0215. 4. Rear Body Interior Light
Switch. See Cargo Lamp 096.
5. Instruments, Warning Lights and Indicator Lights. See
Instrument Cluster 070.
6. Horn Button. See Horn065.
7. Outside Rearview Mirror Heater Switch. See Heated
Mirrors 034. 8. Cruise Control Main Switch.
See Cruise Control 0202.
9. Hazard Warning Flasher Switch. See Hazard Warning
Flashers 094.
10. Diesel Particulate Filter (DPF) Switch. See Diesel Particulate
Filter 0161.
11. Odometer Check Switch. See Odometer 071.
Engine Oil Level Check Switch.
See Engine Oil 0223.
12. Door Lock Switch. See Power
Door Locks 033.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
24 In Brief
Diesel Exhaust Fluid
Diesel Exhaust Fluid (DEF) is used
with diesel engines to reduce the
amount of regulated emissions
produced. The DEF system must be
maintained for the vehicle to run
properly.
DEF is not a fuel additive. For
refilling instructions, seeDiesel
Exhaust Fluid 0170. DEF should
not be mixed with or added to diesel
fuel. DEF freezes when exposed to
temperature below −11 °C (12 ° F).
Locating Diesel Exhaust Fluid
DEF can be purchased at a dealer.
It can also be purchased at
authorized vehicle and truck
dealerships. Additionally, some
diesel truck fueling stations or
retailers may have DEF for
purchase. See Recommended
Fluids and Lubricants 0326. When the remaining level of DEF
becomes excessively low the DEF
gauge will change color from green
to amber. In addition, warning and
indicator lights will come on and
engine power will be reduced so the
vehicle speed will not exceed
89 km/h (55 MPH). See
Diesel
Exhaust Fluid 0170.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
64 Instruments and Controls
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . . 65
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Windshield Wiper/Washer . . . . . . 66
Power Outlets . . . . . . . . . . . . . . . . . 67
Cigarette Lighter . . . . . . . . . . . . . . . 67
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . 68
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . 69
Instrument Cluster . . . . . . . . . . . . . 70
Speedometer . . . . . . . . . . . . . . . . . . 71
Odometer . . . . . . . . . . . . . . . . . . . . . . 71
Trip Odometer . . . . . . . . . . . . . . . . . 71
Tachometer . . . . . . . . . . . . . . . . . . . . 72
Fuel Gauge . . . . . . . . . . . . . . . . . . . . 72
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . 72
Diesel Exhaust Fluid (DEF) Gauge . . . . . . . . . . . . . . . . . . . . . . . . 73
Seat Belt Reminders . . . . . . . . . . . 73
Battery Warning Light . . . . . . . . . . 73
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . 74 Service Vehicle Soon Light . . . . 74
Brake System Warning Light
(Parking Brake Light) . . . . . . . . . 75
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . 77
Exhaust Brake Light . . . . . . . . . . . 78
Service Transmission Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 78
Automatic Transmission Fluid Temperature Warning Light . . . 78
Overdrive Off Light . . . . . . . . . . . . . 79
Wait-to-Start Light . . . . . . . . . . . . . 79
Engine Oil Pressure Light . . . . . . 79
Engine Oil Level Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . 80
Diesel Exhaust Fluid (DEF) Warning Light . . . . . . . . . . . . . . . . 80
Engine Shutdown Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 80
Idle Shutdown Light . . . . . . . . . . . . 81
Reduced Engine Power Light . . . . . . . . . . . . . . . . . . . . . . . . . 81
High-Beam On Light . . . . . . . . . . . 81
Daytime Running Lamps (DRL) Indicator Light . . . . . . . . . . . . . . . . 82
Cruise Control Light . . . . . . . . . . . 82
Information Displays
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . 82
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . 86
Warning Buzzers . . . . . . . . . . . . . . 91

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
Instruments and Controls 69
Put out lit cigarettes on the
crush-out tab. To empty the ashtray,
hold the lid and pull the ashtray up
and out.
Rear Ashtray (Crew CabModel Only)
Pull the ashtray towards you to use
it. Put out lit cigarettes on the
crush-out tab. The ashtray cannot
be removed. To empty the ashtray,
turn it down while pushing the
crush-out tab to remove cigarette
butts into an appropriate container.
Warning Lights,
Gauges, and
Indicators
Warning lights and gauges can
signal that something is wrong
before it becomes serious enough
to cause an expensive repair or
replacement. Paying attention to the
warning lights and gauges could
prevent injury.
Some warning lights come on briefly
when the engine is started to
indicate they are working. When
one of the warning lights comes on
and stays on while driving, or when
one of the gauges shows there may
be a problem, check the section that
explains what to do. Waiting to do
repairs can be costly and even
dangerous.
For safety reasons, do not place
packages, tools, or other items in
the driver ’s area that may restrict
access to the controls or sight of the
gauges.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
82 Instruments and Controls
Daytime Running Lamps
(DRL) Indicator Light
This light comes on when the DRL
are on. If the vehicle is started
during the daytime with the lighting
switch off and the parking brake
released, the low beam headlamps
will come on at a reduced
brightness. The light will go out
when the lighting switch is
turned on.
SeeExterior Lamp Controls 092.
Cruise Control Light
This light should come on briefly
when the engine control switch is
turned to the ON position, and then
should go out after the engine is
started.
For vehicles with cruise control, this
light comes on when cruise control
is turned on.
This light should come on briefly
when the engine control switch is
turned to the ON position, and then
should go out after the engine is
started.
This light comes on when the
vehicle enters the cruise control
mode after the cruise control set
switch is operated to set the vehicle
speed.
See Cruise Control 0202.
Information Displays
Driver Information
Center (DIC)
The DIC display is in the center of
the instrument cluster. The displays
show the status of many vehicle
systems. There are three parts to
the DIC display:
1. DIC menu items and warning lights and messages (includes
operation related information,
diesel particulate filter (DPF)
status, maintenance data, and
errors)

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
Instruments and Controls 83
2. Automatic transmission shiftindicator
3. Diesel Exhaust Fluid (DEF) gauge
{Warning
Warning or indicator lights
indicated on the DIC can be
temporarily cleared (for
60 seconds) by pressing the DIC
selector once. However, if the
warning light you have cleared is
an engine overheat warning or
other critical circumstance, never
continue driving without taking the
necessary actions. Otherwise,
you will be in danger of vehicle
breakdown or accident. Should
any of the critical warning lights
come on, immediately contact the
nearest dealer.
DIC Menu Items
Use the DIC selector to access the
following menu items.
Language
Select English, French, or Spanish
by turning the DIC selector
clockwise or counterclockwise.
Fuel Economy
The system calculates and stores
the distance traveled and fuel
consumption while driving to
encourage the operator to drive the
vehicle economically. Press the DIC
selector once or more to select fuel
economy. Turn the selector clockwise or counterclockwise to
toggle through the items: average
fuel economy, per trip fuel economy,
and instantaneous fuel economy.
.
Average Fuel Economy:
Indicates the average fuel
economy over the total distance
traveled.
. Per Trip Fuel Economy:
Indicates the per trip fuel
economy based on the mileage
in the TRIP B.
. Instantaneous Fuel Economy:
Indicates the fuel economy at a
given moment while driving.
How to Reset the Per Trip Fuel
Economy
Per trip fuel economy is also cleared
when you reset the TRIP B to zero.
Voltmeter
The voltmeter shows the current
status of the charge of the battery.
Green indicates the current status of
the charge of the battery.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
84 Instruments and Controls
Red means the battery voltage is
too low or too high. If the voltmeter
sign appears in red, have the
vehicle checked and serviced at
your dealer. During or immediately
after the engine is started, a red
abnormal L voltage may display on
the DIC. If the warning disappears
after the engine has started, there is
no problem with the battery voltage.
Calendar and Clock
{Warning
The calendar and clock can be
set only while the vehicle is
stationary. When setting the
calendar or clock, park your
vehicle in a safe place where
stopping or parking is permitted
and that is well clear of traffic.
Press the DIC selector once or
more to select the calendar. Press
and hold the DIC selector to enter
the clock setting screen. The year
segment will flash. Turn the DIC
selector clockwise or
counterclockwise to increase or decrease the year. While in the year
setting screen, press the DIC
selector once to switch to the month
setting screen. The month segment
will flash. Use the same method to
set the month. While in the month
setting screen, press the DIC
selector again to switch to the day
setting mode. Adjust the day using
the selector.
Press and hold the DIC selector to
complete the calendar setting.
When complete, the normal
calendar display will resume. Use
this same method to set the hour
and minute when in the clock setting
screen.
Dimmer
The brightness of the DIC can be
adjusted while the light control
switch is off. Select this screen and
turn the DIC selector clockwise or
counterclockwise to brighten or dim
the illumination. The brightness is
linked to the adjustment of the
instrument panel light level control
while the light control switch is on.
See
Instrument Panel Illumination
Control 095.
Warning Lights and Messages
.
Engine Overheat Warning Light
. Low Coolant Warning Light
. Water Separator Warning Light
. Air Cleaner Light
. Low Fuel Warning Light
. Regeneration Warning Lights
. Exhaust System Warning Light
. Refill DEF Warning Light
. DIC Errors
. Maintenance Data
. Hour Meter
See Vehicle Messages 086.
Maintenance Data Functions
Display/Not Display the
Maintenance Data Function
Maintenance Light: On the DIC, go
to the Maintenance Indicator Light.
Switch the display by pressing and
holding the DIC selector for more
than two seconds. Turn the DIC
selector clockwise or
counterclockwise to switch the

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
Instruments and Controls 89
Exhaust System Warning Light
EXH. SYSTEM
This light comes on when the SCR
system detects a malfunction or
incorrect DEF. SCR system will turn
on other indicator lights and reduce
engine power in progressive stages
to encourage you to have the
malfunction corrected. Continuing to
drive for too long after this light
turns on will eventually result in a
severe vehicle speed limitation.
If this light turns on, promptly have
the vehicle inspected and serviced
at your dealer. SeeDiesel Exhaust
Fluid 0170.
Refill Diesel Exhaust Fluid
(DEF) Warning Light
REFILL DEF
This message displays and a
warning light appears when the DEF
tank is almost empty. Add DEF as
soon as possible.
Engine power will be reduced and
vehicle speed will be limited when
this light is activated. Failure to
promptly refill the DEF tank will result in a severe vehicle speed
limitation. See
Diesel Exhaust Fluid
0 170.
When DIC ERROR is Displayed
ERROR
If the system has not yet been able
to access maintenance data,
ERROR is shown on the DIC.
If ERROR does not change
automatically to a distance or other
maintenance indication, have your
vehicle serviced at your dealer.
Maintenance Data Indicator
Lights
Maintenance data indicator lights
appear on the DIC when each
maintenance item is selected or
when the next change or service
interval of the item is near or has
been reached.
The distance or time shown is the
remaining or excess of them to /
from the change or service timing.
The positive distance or time shows
the remaining of that and the
negative distance or time shows the
excess of that. For the items listed below, the displayed color will
change from green to amber when
remaining distance is below
1 000 km (1,000 mi) and the screen
is selected.
These screens are also displayed
when the engine control switch
turns to the ON position after above
notification timing. The message
remains on the display until the DIC
selector is pressed once or the
vehicle is started.
The maintenance data function
indicates the distance remaining
before the next scheduled
maintenance. Scheduled
maintenance time is approaching
when the display turns from green
to amber. Have the vehicle checked
and serviced at your dealer as soon
as possible.
The vehicle needs to be maintained
more often if it is driven in severe
conditions.