2019 CHEVROLET LOW CAB FORWARD transmission

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
90 Instruments and Controls
MAINTENANCE ON or
MAINTENANCE OFF
This indicator displays and hides
maintenance items. When
MAINTENANCE ON is displayed,
maintenance items will be
displayed. When MAINTENANCE
OFF is displayed, maintenance
items will not be displayed.
When MAINTENANCE OFF is
displayed, there will be no display of
maintenance items such as rotation
intervals or replacement intervals
even when such intervals arrive.
ENG OIL & FILTER
When this message and light
display green, it shows the distance
remaining until the next engine oil
and filter change. When this
message displays amber, the next
change of engine oil and filter is
near or has been reached.
T/M & DIFF OIL
When this message and light
display green, it shows the distance
remaining until the next
transmission oil and differential oilchange. When this message
displays amber, the next change of
transmission oil and differential oil is
near or has been reached.
FUEL FILTER
When this message and light
display green, it shows the distance
remaining until the next fuel filter
change. When this message
displays amber, the next change of
fuel filter is near or has been
reached.
STEERING OIL
When this message and light
display green, it shows the distance
remaining until the next power
steering fluid change. When this
message displays amber, the next
change of power steering fluid is
near or has been reached.
TIRE ROTATION
When this message and light show
green with OFF, it means the
vehicle has been shipped from the
factory with no tire rotation interval
set. When this message displays
green it has the distance until thenext tire rotation displayed. When
this message displays amber the
next tire rotation is near or has
already been reached.
STARTER
When this message and light is
green, it displays the number of
engine starts remaining until a
starter motor is replaced. When this
message and light is amber, it
displays when the time for a starter
motor replacement is near or has
already been reached.
For the starter indicator light, the
displayed color will change from
green to amber when the display
reaches zero and the screen is
selected.
For resetting or setting maintenance
data intervals, see
Driver
Information Center (DIC) 082.

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
102 Infotainment System
band, your radio may tune in the
second station until the original
signal can be picked up again.
AM Transmissions
Fading - AM broadcasts are
reflected by the upper atmosphere,
especially at night. These reflected
signals can interfere with those
received directly from the radio
station, causing the radio station to
sound alternately strong and weak.
Station interference - When a
reflected signal and a signal
received directly from a radio station
are very nearly the same frequency,
they can interfere with each other,
making it difficult to hear the
broadcast.
Static - AM is easily affected by
external sources of electrical noise,
such as high tension power lines,
lightning, or electrical motors. This
results in static.
Certification
For Federal Communications
Commission (FCC) compliance
information for this device, see
Radio Frequency Statement0370.
Fixed Mast Antenna
Pull the antenna out to its full length
when using it.
To prevent breaking the antenna,
shorten it when passing through
areas with low clearance or through
a car wash.
Audio Players
CD Player
CD Operations
Playing a Disc (When There is No
CD Inserted)
Insert a disc into the disc slot with
the label side (printed side) facing
up. The power will switch on and
playback will start automatically.
Playing a Disc (When There is a
CD Inserted)
1. Press MODE/
O/ENTER.
2. Turn MODE/
O/ENTER to
select DISC, and then press
ENTER.
Turning off the Player
Press POWER for one second or
more. To resume playback, press
POWER again.
Ejecting the Disc
Press EJECT to stop playback and
eject the disc.

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
138 Driving and Operating
Driving and
Operating
Driving Information
Driver Behavior . . . . . . . . . . . . . . . 139
Distracted Driving . . . . . . . . . . . . 139
Control of a Vehicle . . . . . . . . . . . 139
Braking . . . . . . . . . . . . . . . . . . . . . . . 143
Steering . . . . . . . . . . . . . . . . . . . . . . 149
Driving on Wet Roads . . . . . . . . 149
Hill and Mountain Roads . . . . . 150
Winter Driving . . . . . . . . . . . . . . . . 151
If the Vehicle Is Stuck . . . . . . . . 153
Emergencies(Troubleshooting) . . . . . . . . . . . 154
Emergencies (Disabled Vehicle) . . . . . . . . . . . . . . . . . . . . . 164
Starting and Operating
New Vehicle Break-In . . . . . . . . . 165
Pedals . . . . . . . . . . . . . . . . . . . . . . . . 166
Ignition Positions . . . . . . . . . . . . . 166
Starting and Stopping theVehicle . . . . . . . . . . . . . . . . . . . . . . 168
Operating Temperature . . . . . . . 171
Winter Cover . . . . . . . . . . . . . . . . . 172
Engine Heater . . . . . . . . . . . . . . . . 172 Engine Alarm and Automatic
Shutdown . . . . . . . . . . . . . . . . . . . 173
Idle Shutdown . . . . . . . . . . . . . . . . 174
High Idle System . . . . . . . . . . . . . 174
Engine Checks Before Operating . . . . . . . . . . . . . . . . . . . 175
Parking over Things That Burn . . . . . . . . . . . . . . . . . . . 176
Engine Exhaust
Engine Exhaust . . . . . . . . . . . . . . 177
Running the Vehicle WhileParked . . . . . . . . . . . . . . . . . . . . . . 179
Diesel Particulate Filter
Diesel Particulate Filter . . . . . . . 180
Diesel Exhaust Fluid
Diesel Exhaust Fluid . . . . . . . . . . 189
Automatic Transmission
Automatic Transmission . . . . . . 205
Selector Lever . . . . . . . . . . . . . . . . 214
Overdrive Off . . . . . . . . . . . . . . . . . 215
Brakes
Antilock BrakeSystem (ABS) . . . . . . . . . . . . . . . 216
Parking Brake . . . . . . . . . . . . . . . . 220
Exhaust Brake . . . . . . . . . . . . . . . . 222
Cruise Control
Cruise Control . . . . . . . . . . . . . . . . 223
Fuel
Fuel for Diesel Engines . . . . . . . 227
Biodiesel . . . . . . . . . . . . . . . . . . . . . 228
Cold Weather Operation . . . . . . 230
Water in Fuel . . . . . . . . . . . . . . . . . 231
Running Out of Fuel . . . . . . . . . . 233
Filling the Tank . . . . . . . . . . . . . . . 235
Conversions and Add-Ons
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . 236
Power Take-Off (PTO) . . . . . . . . 237

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Driving and Operating 145
Brake System Warning Light
Caution
If brake low vacuum warning light
(4500HD, 4500XD models), brake
booster warning light (5500HD,
5500XD models), or brake system
warning light comes on during
operation, have brake system
checked immediately.
Refer to Warning Lights, Gauges,
and Indicators 068.
When the Brakes Do Not Work
{Warning
It is very dangerous to suddenly
pull the parking brake lever all the
way while moving at high speed.
Reduce speed first by shifting
down and then gradually pull the
parking brake lever.
You and others could be seriously
injured. The exhaust brake should be turned
on as soon as service brake
malfunction is detected. This will
slow the engine speed. With the
engine speed under control and
providing the grade conditions
permit, the transmission can be
progressively downshifted using the
exhaust brake in each gear.
Eventually the exhaust brake should
slow the vehicle to a controllable
“crawl.”
Gradually pull the parking
brake lever while firmly holding on
to the steering wheel. Stop the
vehicle on the side of the road. The
vehicle should not be driven further
until corrective measures are taken.
See Exhaust Brake 0222 and
Parking Brake 0220.
Riding the Brake
{Warning
"Riding the brake" by resting your
foot on the pedal, when you do
not intend to brake, can overheat
the brakes and wear out the (Continued)
Warning (Continued)
brake linings faster. This may also
damage the brakes and will waste
fuel. It can also result in reduced
braking performance.
You and others could be seriously
injured.
Applying the Parking Brake
Except in an emergency, do not
apply the parking brake until the
vehicle has come to a complete
stop. Applying the parking brake
before the vehicle has stopped can
cause a breakdown.
Refer toParking Brake 0220.
Parking Safely on a Slope
Avoid parking your vehicle on a
slope as much as possible and
choose a level and flat place. If you
must park your vehicle on a slope,
be sure to set the parking brake
fully. Make sure that the vehicle
does not move, and block the
wheels with chocks for added

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Driving and Operating 147
Parking, or Leaving
Driver’s Seat
{Danger
It can be dangerous to get out of
your vehicle if the selector lever is
not fully in "P" (Park) or the
parking brake is not applied all
the way. Your vehicle can roll or
move suddenly.
To be sure your vehicle will not
move, even when you are parking
on level ground, follow the steps
below. (If you have to park on a
hill, also turn your front wheels so
the vehicle will roll away from
traffic.)
You and others could be seriously
injured or killed.
1. Hold the regular brake pedal down with your right foot and
apply the parking brake all the
way before shifting the
transmission. Follow the
Parking Brake instructions in
this manual for your vehicle. 2. To move the selector lever to
"P" (Park), hold in the button
on the lever and push the lever
all the way toward the front of
your vehicle.
3. Turn the key to "LOCK".
4. Remove the key and take it with you.
5. Before you leave the driver's seat, be sure the vehicle is not
moving, or check that your
vehicle is in Park by trying to
pull the selector lever out of "P"
(Park) by pulling the selector
lever toward you without
pushing the button. If you can
do this, it means that the
selector lever was not fully
locked into "P" (Park).
Do Not Touch the Selector Lever
While the Vehicle is Stationary
with the Engine Idling
Do not touch the selector lever while
the vehicle is stationary with the
engine idling. If you touch the
selector lever at this time, a gear
could be selected and the vehicle
could move even with the parking brake applied. The risk of knocking
against the selector lever and
causing a crash is particularly great
when you move in or out of
your seat.Driving Down a Long Slope
When driving down a long slope,
use the exhaust brake together with
the foot brake. Using the exhaust
brake and low-gears reduces the
work load on the foot brakes and
yields greater braking force. Even
so, use the foot brakes
appropriately to prevent the engine
over-revving.
Frequent use of the foot brakes can
cause vapor lock and brake fade,
resulting in reduced brake
effectiveness.
Brake Fade :
Frequent use of the
brakes can cause the brakes to
overheat so that the frictional force
of the brake linings decreases and
the brakes become less effective
than normal. This phenomenon is
called brake fade.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
148 Driving and Operating
Vapor Lock :If the brakes overheat
due to frequent use, the heat can
cause the brake fluid to boil so that
air bubbles are created in the brake
fluid. Pressing the brake pedal
simply compresses the air bubbles;
pressure is not transmitted to the
wheel cylinders, so the brakes'
effectiveness sharply deteriorates.
This phenomenon is called
vapor lock.
Even so, you should be very careful
when using engine braking in a low
gear because the engine is likely to
over-rev.
See Exhaust Brake 0222 and
Selector Lever 0214.
Do not adjust the exhaust brake
valve.
The engine should never be allowed
to exceed the governed speed.
Supplement the exhaust brake with
vehicle service brakes intermittently
and/or shift to higher transmission
gear to prevent engine overspeed.
A rule of thumb for gear selection is
that the vehicle should be driven
down a grade in the same gear that
would be used to climb that grade.{Warning
To reduce the risk of personal
injury, before going down a steep
or long grade, reduce speed, turn
on the exhaust brake and shift the
transmission to the next lower
gear. This will help control your
speed. Do not hold the brake
pedal down too long or too often
while going down a steep or long
grade. This could cause the
brakes to get hot and not to work
as well. As a result, the truck will
not slow down at the usual rate.
Failure to take these steps could
result in loss of vehicle control.
You and others could be seriously
injured.
Brake Effectiveness When the
Vehicle Has Been Driven on a
Flooded Road or Washed
{Warning
When the vehicle is driven on a
flooded road, parked on a flooded
road or washed, water can get
into the brakes and reduce their
effectiveness. If the brakes do not
work well afterward, drive slowly
and gently press the brake pedal
several times until the brakes dry
out and start working normally.
Always do this after driving
through water or washing the
vehicle to help reduce the risk of
personal injury. Before parking
the vehicle in winter, press the
brake pedal several times in the
same way to get rid of moisture in
the brakes. Otherwise, the
moisture in the brakes may freeze
and make the vehicle immovable.
You and others could be seriously
injured.