lock CHEVROLET LOW CAB FORWARD 2019 Service Manual

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
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 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Instruments and Controls 85
display. Complete the resetting by
pressing and holding the DIC
selector for more than two seconds.
To cancel the setting procedure,
press the DIC selector once. The
display will go back to the previous
screen.
Resetting/Setting the Change
Interval (Odometer Reading)
Engine Oil and Filter Light :On
the DIC, go to the engine oil and
filter light. Enter the resetting screen
by pressing and holding the DIC
selector for more than two seconds.
Complete the resetting by pressing
and holding the DIC selector for
more than two seconds.
Transmission and Differential
Gear Oil Light, Fuel Filter Light,
Power Steering Fluid Light, and
Tire Rotation Light : On the DIC,
go to the particular maintenance
item to reset/adjust. Enter the
setting change screen by pressing
and holding the DIC selector. Set
the change interval by turning the
DIC selector. (Transmission and
Differential Oil, Steering Fluid, and Tire Rotation Only). Turn clockwise
to increase distance and
counterclockwise to decrease
distance. The distance increases
and decreases by 4,000 km
(2,500 mi) increments. Complete the
resetting by pressing and holding
the DIC selector.
Transmission and Differential Gear
Oil and Power Steering Fluid: Initial
value: 48,000 km (30,000 mi).
Adjustable minimum value:
32,000 km (20,000 mi). Adjustable
maximum value: 48,000 km
(30,000 mi).
Tire Rotation: Initial value: OFF.
Adjustable minimum value:
6,000 km (4,000 mi). Adjustable
maximum value: 62,000 km
(39,000 mi).
Starter Indicator Light :
On the
DIC, go to the starter indicator light.
Enter the resetting screen by
pressing and holding the DIC
selector for more than ten seconds.
Complete the resetting by pressing
and holding the DIC selector for
more than ten seconds. If you want to cancel the setting
procedure, press the DIC selector
once. The display will go back to the
previous screen.
Diesel Exhaust Fluid (DEF)
Gauge
With the engine control switch in the
ON position, this gauge indicates
the approximate quantity of DEF
remaining in the DEF tank. F means
the tank is full and E means the
tank is almost empty. When only
one green bar is showing, the DEF
tank is almost empty and should be
refilled soon. If the vehicle is driven
too long with only one bar, the green
will change to amber and additional
warnings and indicators will display.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
92 Lighting
Lighting
Exterior Lighting
Exterior Lamp Controls . . . . . . . . 92
Headlamp High/Low-BeamChanger . . . . . . . . . . . . . . . . . . . . . . 93
Flash-to-Pass . . . . . . . . . . . . . . . . . . 93
Hazard Warning Flashers . . . . . . 94
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . 94
Cornering Lamps . . . . . . . . . . . . . . 95
Interior Lighting
Instrument Panel Illumination Control . . . . . . . . . . . . . . . . . . . . . . . 95
Cargo Lamp . . . . . . . . . . . . . . . . . . . 96
Dome Lamps . . . . . . . . . . . . . . . . . . 96
Exterior Lighting
Exterior Lamp Controls
Turning the light control switch to
the following positions will cause the
relevant lights to illuminate.
The light control switch can be used
when the engine control switch is
placed in the LOCK or ACC
position. Do not operate the
combination lights for an extended
time period with the engine off.
Otherwise, the battery may go dead,
making it impossible to restart the
engine.
9: Turns off all exterior lights.
;:Turns on the parking lights
including all exterior lights, except
the headlights.
2: Turns on the headlights
together with the parking lights,
sidemarker lights, roofmarker lights,
taillights, license plate light, and
instrument panel lights.
When you start the engine in
daytime, with the lighting switch off,
and release the parking brake, the
daytime running lights will come on.
See Daytime Running Lamps (DRL)
Indicator Light 081 and Turn and
Lane-Change Signals 094.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Infotainment System 99
*4 This mode is skipped when
an auxiliary player is not
connected.
Adjusting the Volume
Turn the MODE/
O/ENTER knob
clockwise or counterclockwise to
increase or decrease the volume.
Turning the power on or off with the
volume set to maximum will damage
the equipment and your hearing. Set
the volume to a moderate level.
The MODE/
O/ENTER knob keeps
on turning until you stop. However,
the volume itself is limited, and even
if you keep on turning the MODE/
O
/ENTER knob clockwise or
counterclockwise, the volume is
kept to a certain degree.
When the gear lever is moved to the
reverse (R) position, the system will
automatically mute the sound.
Function Setting Mode
Adjustment of bass, treble, fader,
and balance, and setting of clock
display and time can be performed. Adjusting Bass
1. Press FUNC.
2. Turn MODE/
O/ENTER to
select SOUND, and then press
ENTER.
3. Turn MODE/
O/ENTER to
select BASS, and then press
ENTER.
4. Turn MODE/
O/ENTER
clockwise or counterclockwise
to adjust the level, and then
press ENTER.
Adjusting Treble 1. Press FUNC.
2. Turn MODE/
O/ENTER to
select SOUND, and then press
ENTER.
3. Turn MODE/
O/ENTER to
select TREBLE, and then press
ENTER.
4. Turn MODE/
O/ENTER
clockwise or counterclockwise
to adjust the level, and then
press ENTER. Adjusting Fader
1. Press FUNC.
2. Turn MODE/
O/ENTER to
select SOUND, and then press
ENTER.
3. Turn MODE/
O/ENTER to
select FADER, and then press
ENTER.
4. Turn MODE/
O/ENTER
clockwise or counterclockwise
to adjust the front or rear
speakers, and then press
ENTER.
Adjustment of rear speaker volume
is not possible if there are no rear
speakers installed.
Adjusting Balance 1. Press FUNC.
2. Turn MODE/
O/ENTER to
select SOUND, and then press
ENTER.
3. Turn MODE/
O/ENTER to
select BALANCE, and then
press ENTER.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
100 Infotainment System
4. Turn MODE/O/ENTER
clockwise or counterclockwise
to adjust the right or left
speakers, and then press
ENTER.
Clock Display 1. Press FUNC.
2. Turn MODE/
O/ENTER to
select CLOCK, and then press
ENTER.
3. Turn MODE/
O/ENTER
clockwise or counterclockwise
to select OFF or ON, and then
press ENTER.
Time is not reset when clock mode
is turned off.
Setting the Time
1. Press FUNC.
2. Turn MODE/
O/ENTER to
select CLOCK, and then press
ENTER. 3. Turn MODE/
O/ENTER
clockwise or counterclockwise
to select SET, and then press
ENTER.
4. Turn MODE/
O/ENTER to set
the clock time (hour), and then
press ENTER. Turn clockwise
or counterclockwise to move
one hour forward or one hour
backward.
5. Turn MODE/
O/ENTER to set
the clock time (minute), and
then press ENTER. Turn
clockwise or counterclockwise
to move one minute forward or
one minute backward.
To return to the clock time (hour)
setting mode, press
0while
setting the clock time (minute).
Tuner Mode Operation
Turning on the Radio
1. Press MODE/
O/ENTER. 2. Turn MODE/
O/ENTER to
select "FM1", "FM2", "FM3",
"AM1" or "AM2", and then
press the "ENTER" button.
Follow one of the procedures below
to tune.
Tuning
Manual tuning:
1. Press Tune/Track
yorzfor
less than one second.
2. Press Tune/Track
yorzfor
less than one second again to
select the station of your
choice.
Automatic tuning:
1. Press Tune/Track
yorzfor
less than two seconds but
more than one second. The
radio starts searching for
stations, and stops when it
finds a station.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Infotainment System 101
2. Press and hold Tune/Tracky
orzfor more than
two seconds. The radio keeps
searching for stations within its
available frequency band. To
cancel, press the button again.
When Tune/Track
yis pressed, the
radio is tuned to the higher
frequency range (step up), and to
the lower frequency range (step
down) when pressing Tune/
Track
z.
In either cases, if the radio cannot
find stations, it continues searching.
Storing the Stations (PRESET)
Favorite stations can be tuned by
one touch operation if they are
stored in the Preset buttons.
A maximum of 30 stations can be
saved. 12 in AM (six each for
AM1 and AM2.), and 18 in FM (six
each for FM1, FM2 and FM3.) 1. Select the radio mode to be stored from FM1, FM2, FM3,
AM1 or AM2. 2. Tune in the station of your
choice.
3. Press and hold down the Preset buttons you want to
store in, for more than
two seconds. When the station
is stored, the Preset button
number and station frequency
appear on the display window.
Radio Reception
Usually, a problem with radio
reception does not mean there is a
problem with your radio. It is just the
normal result of conditions outside
the vehicle. For example, nearby
buildings and terrain can interfere
with FM reception. Power lines or
telephone wires can interfere with
AM signals.
And of course, radio signals have a
limited range. The farther you are
from a station, the weaker its signal
will be. In addition, reception
conditions change constantly as
your vehicle moves. Here are some common reception
problems that probably do not
indicate a problem with your radio.
FM Transmissions
Fading and drifting stations -
Generally, the effective range of FM
is about 40 km (25 miles). Once
outside this range, you may notice
fading and drifting, which increase
with the distance from the radio
transmitter. They are often
accompanied by distortion.
Multi-path - FM signals are
reflective, making it possible for two
signals to reach your antenna at the
same time. If this happens, the
signals will cancel each other out,
causing a momentary flutter or loss
of reception.
Static and fluttering - These occur
when signals are blocked by
buildings, trees, or other large
objects. Increasing the bass level
may reduce static and fluttering.
Station swapping - If the FM signal
you are listening to is interrupted or
weakened, and there is another
strong station nearby on the FM

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Infotainment System 117
Playable WMA File Standards
.Supported standards:
. Supported sampling frequencies:
32, 44.1, 48 (kHz)
. Supported bit rates: Ver. 7, 8:
CBR 48, 64, 80, 96, 128, 160,
192 (kbps) Ver. 9 (9.1/9.2): CBR
48, 64, 80, 96, 128, 160, 192,
256, 320 (kbps)
Only compatible with 2-channel
playback
. Variable bit rate (VBR) is
supported.
. Lossless compression is not
supported.
ID3 Tag/WMA Tag
MP3/WMA files have an ID3 Tag/
WMA Tag that allows the input of
information so that data such as
song title and artist can be saved.
This deck supports ID3 Ver. 1.0, 1.1,
2.2, 2.3 and WMA tags. Display Order of MP3/WMA File/
Folder Names
Names of MP3/WMA folders and
files within the same level are
displayed in the following order.
1. MP3/WMA folders displayed first, by ascending order of
numbers, letters. The files
stored just below the root of the
disc will be stored in the ROOT
FOLDER.
2. Files displayed next, by ascending order of numbers,
letters. It is assumed here that
a disc has already been loaded
into the unit.
Normally, tracks in ROOT FOLDER
will be played in order from the
first file.
Auxiliary Devices
AUX Operation
By connecting the 3.5 mm
headphone jack of your own
portable audio device to the Mini
jack, you can listen to your own
music through this unit. 1. Use the mini plug cable, and
connect the portable audio
device to the Mini jack.
2. Press MODE/
O/ENTER.
3. Turn MODE/
O/ENTER to
select AUX, and then press
ENTER.
Connecting the mini plug cable to
the Mini jack also establishes the
AUX mode and enables you to use
the portable audio device.
When the mini plug cable is
disconnected from the main unit, the
AUX mode is cancelled.
Adjusting the Volume
Turn the Volume adjust knob
clockwise or counterclockwise to
adjust the volume.
. Turn clockwise: Increase the
volume.
. Turn counterclockwise:
Decrease the volume.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Infotainment System 127
Alphanumeric characters and
the following symbols are
available. '< > * + - . / \ = _
(space)
y: Advance to the next digit.
z: Delete the entered digit and
return to the previous digit.
5. After entering the name, press ENTER.
SAVED is displayed and the
name registration to the Speed
Dial is complete.
Setting the Volume
Call Volume: Turn Volume Adjust
during a call.
. Turn clockwise: Increase the
volume.
. Turn counterclockwise:
Decrease the volume. The
adjusted volume value is saved.
Ringtone Volume: Turn Volume
Adjust during an incoming call.
. Turn clockwise: Increase the
volume. .
Turn counterclockwise:
Decrease the volume. The
adjusted volume value is saved.
The volume and microphone gain
setting of each mobile phone is
different according to its
specification.
Setting the Sensitivity of the
Built-In Microphone
If your voice is too low or difficult to
hear for the person you are talking
to, or there is an echo or howling,
you can adjust the microphone
sensitivity.
Press the Level Adjust during a call.
y: Increase the sensitivity. (The
sound transmission is more
effective.)
z: Decrease the sensitivity. (The
sound transmission is less
effective.)
The setting can be adjusted within
the range of zero to MAX (10).
(Default: five). MIC LEVEL is displayed. MIC
LEVEL disappears in two seconds
after the operation is completed,
and the display returns to its original
state.
Talking on the Mobile Phone
(Private Mode)
You can switch phone calls from this
unit (handsfree mode) to the mobile
phone.
Press and hold down the Off Hook
for more than one second during
a call.
Entering Tone Numbers
You can transmit tone numbers
during a call.
1. Press FUNC during a call.
2. Turn MODE/O/ENTER to
select the tone number. You
can enter phone numbers by
one digit at a time.
Numeric character (0-9) and
symbols (*, #, +) are available.
You can use the symbols (+)
only for the first digit.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Infotainment System 129
5. Turn the Volume Adjust.Turn clockwise: Increase the
volume.
Turn counterclockwise:
Decrease the volume. The
adjusted volume value is
saved.
To adjust the volume during an
incoming call or during a call,
see “Setting the Volume" in this
section.
Setting the Phonebook Auto
Transfer 1. Press FUNC.
2. Turn MODE/
O/ENTER to
select BLUETOOTH, and then
press ENTER.
3. Turn MODE/
O/ENTER to
select A.TRANSFER, and then
press ENTER. 4. Turn MODE/
O/ENTER to
switch ON/OFF, and then press
ENTER.
TRANSFER ON: Turn on the
phonebook transfer.
TRANSFER OFF: Turn off the
phonebook transfer.
Deleting a Phonebook 1. Press FUNC.
2. Turn MODE/
O/ENTER to
select BLUETOOTH, and then
press ENTER.
3. Turn MODE/
O/ENTER to
select DEL P.BOOK, and then
press ENTER.
4. When DELETE ? is displayed, press ENTER.
Trademarks and
License Agreements
FCC Information
See Radio Frequency Statement
0 370.
iPod and iTunes may be used with
materials without copyright,
or materials for which copying or
playback are legally allowed for the
purposes of private copying or
playback. The infringement of
copyright is prohibited by law.
"Made for iPod" and "Made for
iPhone" mean that an electronic
accessory has been designed to
connect specifically to iPod or
iPhone, respectively, and has been
certified by the developer to meet
Apple performance standards.
Apple is not responsible for the

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
132 Climate Controls
O:Use this position to prevent
dusty or otherwise contaminated
outside air from entering the cab,
such as in a tunnel or in congested
traffic.
Extended use of the inside air
recirculation position causes the
windshield and windows to fog up
easily, making visibility poor. For
good ventilation, switch to outside
air as soon as possible.
Temperature Control Knob : Use
this knob to select the preferred cab
interior temperature. Turn the knob
counterclockwise to lower the outlet
air temperature and clockwise to
raise it.
Fan Speed Control Knob : The fan
speed can be adjusted to any of the
four speeds available.
Air Conditioning (A/C) Switch :
Press this switch to use the air
conditioning system. The indicator
light inside the switch will come on
to show that the air conditioning
system is in operation. The air
conditioning system can also be
used for dehumidifying while the heater is being used. To turn off the
air conditioning, push this switch in
again.
When the defrost mode is selected,
the air conditioner compressor will
be on.
Even if the A/C switch is turned on,
the air conditioning system will not
operate when the fan speed control
knob is placed in the stop position.
Make sure that the fan speed
control knob is in a position other
than the stop position.
Even in seasons when the air
conditioning system is not used,
occasionally operate the system for
a few minutes with the engine
running at a low speed in order to
keep the system's components
lubricated.
Ventilation
Outside Air Ventilation :
Press the
A/C switch to the off position. Turn
the outlet selector knob to the
preferred position. Move the air
selector lever to the
Pposition. Set the temperature control knob to
the desired position. Adjust the fan
speed control knob to the preferred
speed.
How to Use the Heater
Normal Heating :
Set the outlet
selector knob to the
6or-
position. Use the-position for
warming your feet while defogging
the windshield.
Set the air selector lever to the
P
position. Adjust the temperature
control knob and the fan speed
control knob to the desired
positions.
To dehumidify the cab interior while
heating, press the A/C switch to the
on position.
As the heater uses the heat from
the engine coolant, its heating effect
is weak when the engine coolant
temperature is low.
Maximum Heating : Turn the outlet
selector knob to the
6position, set
the air selector lever to the
O