CHEVROLET LOW CAB FORWARD 2020 Workshop Manual

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
50 Storage
Cargo loading cautionIncorrectCorrect
Use ropes and tarpaulins to secure the cargo so it does not fall off the
cargo bed. Use rubber bands or bungee cords to prevent the tarpaulins
from flapping in the wind.
Avoid loading cargo too high. It can cause the vehicle to tip sideways
when it catches side winds and when turning the vehicle.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
Storage 51
Loading Equipment
Do not load equipment from the rear
of the cargo bed. The frame may
become deformed when equipment
is loaded from the rear of the cargo
bed. In addition, the frame may
become deformed even when
loading equipment that has a weight
under the maximum loading
capacity.When loading equipment, a device
for securing the cargo bed is
required. Use a car carrier or attach
a rear support stand. If you have
any questions, contact your dealer.
Make Sure There is No Flammable
Material between the Cab and
Cargo Bed
Caution
Be careful not to allow a sheet,
canvas top, or the ends of ropes
or rubber straps to touch or come
close to the engine or exhaust
pipe. During vehicle operation,
the engine’s heat could set them
on fire. Carefully secure the
sheet, canvas top, or the ends of
ropes or rubber straps.
Do not Carry Fuel and Spray Cans
in the Cab
{Danger
It is extremely dangerous to carry
fuel and spray cans in the cab.
If such a container were to ignite
or rupture, it could cause a fire or
explosion. You and others could
be seriously injured.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
52 Instruments and Controls
Instruments and
Controls
Controls
Steering Wheel Adjustment . . . . 53
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Windshield Wiper/Washer . . . . . . 54
Power Outlets . . . . . . . . . . . . . . . . . 55
Warning Lights, Gauges, and
Indicators
Warning Lights, Gauges, andIndicators . . . . . . . . . . . . . . . . . . . . 56
Instrument Cluster . . . . . . . . . . . . . 57
Speedometer . . . . . . . . . . . . . . . . . . 58
Odometer . . . . . . . . . . . . . . . . . . . . . . 58
Trip Odometer . . . . . . . . . . . . . . . . . 58
Tachometer . . . . . . . . . . . . . . . . . . . . 59
Fuel Gauge . . . . . . . . . . . . . . . . . . . . 59
Engine Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . . . 60
Diesel Exhaust Fluid (DEF) Gauge . . . . . . . . . . . . . . . . . . . . . . . . 60
Seat Belt Reminders . . . . . . . . . . . 60
Battery Warning Light . . . . . . . . . . 61
Malfunction Indicator Lamp (Check Engine Light) . . . . . . . . . 61
Service Vehicle Soon Light . . . . 62 Brake System Warning Light
(Parking Brake Light) . . . . . . . . . 62
Antilock Brake System (ABS) Warning Light . . . . . . . . . . . . . . . . 64
Exhaust Brake Light . . . . . . . . . . . 65
Service Transmission Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . 65
Automatic Transmission Fluid Temperature Warning Light . . . 66
Overdrive Off Light . . . . . . . . . . . . . 66
Wait-to-Start Light . . . . . . . . . . . . . 67
Engine Oil Pressure Light . . . . . . 67
Engine Oil Level Indicator Light . . . . . . . . . . . . . . . . . . . . . . . . . 67
Diesel Exhaust Fluid (DEF) Warning Light . . . . . . . . . . . . . . . . 68
Engine Shutdown Warning Light . . . . . . . . . . . . . . . . . . . . . . . . . 68
Idle Shutdown Light . . . . . . . . . . . . 68
Reduced Engine Power Light . . . . . . . . . . . . . . . . . . . . . . . . . 69
High-Beam On Light . . . . . . . . . . . 69
Daytime Running Lamps (DRL) Indicator Light . . . . . . . . . . . . . . . . 69
Cruise Control Light . . . . . . . . . . . 70
Information Displays
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . 70
Vehicle Messages
Vehicle Messages . . . . . . . . . . . . . 74
Warning Buzzers . . . . . . . . . . . . . . 79

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
Instruments and Controls 53
Controls
Steering Wheel
Adjustment
{Warning
.Adjust the position of the
steering wheel before you
start driving.
. To reduce the risk of
personal injury, apply force
to the steering wheel to
make certain the steering
column is firmly locked
before driving. Also, do not
try to tilt or adjust the
steering wheel while the
vehicle is moving. If these
steps are not followed, the
steering column could move
suddenly while the vehicle
is in motion which could
cause a temporary loss of
steering control which may
result in personal injury or
death.
The steering wheel is adjustable up
and down as well as forward and
backward.
Before adjusting, position the seat
as desired.
1. Lift the lock lever toward you to unlock the steering column.
2. Sit in the correct driving position, and then move the
steering wheel up and down
and forward and backward to
select the optimum steering
wheel position. 3. Firmly lock the steering wheel
at the selected position by
moving the lock lever to the
lock position.
Horn
To sound the horn, press the pad
with a horn symbol on the steering
wheel.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
54 Instruments and Controls
Windshield Wiper/Washer
To use the windshield wiper and
washer switches, the engine control
switch must be in the ON position.
The windshield wiper switch has the
following positions, which
correspond to the states of the
wiper.
9:Stopped.
3:Intermittent, light rain.
Low Speed : Low speed,
moderate rain.
High Speed : High speed,
heavy rain. If the wiper frequently stops during
operation, contact your nearest
Dealer.
Clear snow and ice from the wiper
blades and windshield before using
them. If frozen to the windshield,
carefully loosen or thaw them.
Damaged blades should be
replaced. See
Wiper Blade
Replacement 0265.
Do not operate the wiper on a dry
windshield surface. Otherwise, the
windshield surface may sustain
damage.
Windshield Washer
{Warning
In freezing weather, do not use
the washer until the windshield is
warmed. Otherwise the washer
fluid can form ice on the
windshield, blocking your vision.
{Warning
Before driving the vehicle, always
clear snow and ice from the hood,
windshield, roof, and rear of the
vehicle, including all lamps and
windows. Reduced visibility from
snow and ice buildup could lead
to a crash.
Windshield washer fluid is sprayed
over the windshield when this switch
is pressed. At the same time, the
windshield wiper operates.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
Instruments and Controls 55
To spray washer fluid on the
windshield, push the button on the
end of the combination switch lever.
The spray will continue as long as
you hold in the button.
If windshield washer fluid does not
come out in sufficient quantity,
immediately release the switch.
Otherwise, the windshield surface
may sustain damage.
If windshield washer fluid does not
come out, release the windshield
washer switch immediately.
Otherwise the motor may seize up.
Do not hold the switch pressed for
more than 30 seconds. Otherwise,
the washer pump may sustain
damage.
Check the washer fluid level
regularly. Do it often when the
weather is bad.
SeeWasher Fluid 0252 for
information on filling the windshield
washer fluid resevoir.Power Outlets
You can plug in auxiliary electrical
equipment. Just flip the outlet cover
open from the left edge of the cover
and follow the proper installation
instructions that are included with
any electrical equipment you install.
These circuits are protected by a
fuse and have maximum current
loads. When using accessory power
outlets, total maximum electrical
load must not exceed 120W. Always
turn off any electrical equipment
when not in use.
Leaving electrical equipment on for
extended periods will drain your
battery.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
56 Instruments and Controls
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 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
Instruments and Controls 57
Instrument Cluster

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
58 Instruments and Controls
Speedometer
The speedometer shows the
vehicle's speed in either kilometers
per hour (km/h) or miles per
hour (mph).
Odometer
The odometer shows how far the
vehicle has been driven, in either
kilometers or miles.
Each time the reset knob is pressed
with the engine control switch in the
ON position, the odometer/trip meter
shows ODO, TRIP A, and TRIP B in
this sequence. With the key
removed, the odometer and trip
meter continue to indicate for about
five minutes.
Odometer Check Switch
Press the Odometer Check switch
to display the odometer and trip
meter mileage after the key is
turned off. The fuel gauge will also
operate when this switch is pressed.
The DIC and some lights will
illuminate on the instrument panel.
Trip Odometer
The trip odometer shows how far
the vehicle has been driven since
the trip odometer was last reset.
Press the trip odometer reset stem
next to the odometer to switch
between the odometer and trip
odometer.To reset the trip odometer to zero,
press and hold the trip odometer
reset stem while TRIP A or TRIP B
is displayed. The engine control
switch should be in the ON position.
When the battery is disconnected,
TRIP A and TRIP B will be reset to
zero. The per trip fuel economy is
also reset by the TRIP B reset. See
Driver Information Center (DIC)
0
70.
When you turn the engine control
switch to the ON position, the
odometer/trip odometer shows what
was displayed the last time the
engine control switch was turned to
LOCK or ACC.
To set the odometer to display each
time you turn the engine control
switch to the ON position, turn the
engine control switch to LOCK or
ACC while the odometer is
displayed. With the reset stem
pressed, turn the engine control
switch to the ON position and then
within three seconds, turn the
engine control switch back to the

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
Instruments and Controls 59
LOCK or ACC position. Follow the
same procedure to cancel the
setting.
Tachometer
The tachometer displays the engine
speed in revolutions per
minute (rpm). The red zone
indicates a range of dangerous
engine speeds beyond permissable
levels. Do not drive your vehicle
with the needle in the red zone.
Caution
Exercise extreme care when
shifting down on a steep
downslope. The engine speed
may exceed the critical speed,
which can damage the vehicle.
Fuel Gauge
With the engine control switch in the
ON position, the fuel gauge
indicates about how much fuel is left
in the tank.To check the fuel level with the
engine control switch in the LOCK
position, press the Odometer Check
switch.
Fill the tank well before it
approaches empty. After filling up
the fuel tank, it takes awhile for the
fuel gauge needle to stabilize after
the engine control switch is turned
to the ON position. If the fuel tank is
filled while the engine is off, but the
engine control switch is in the ON
position, the fuel gauge needle
takes awhile to show the correct
reading.
See
“Low Fuel Warning Light” in
Driver Information Center (DIC) 070
and
Running Out of Fuel 0224.