check engine light CHEVROLET LOW CAB FORWARD 2020 Owner's 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
10 Introduction
Instrument Panel Overview (Driver Side)
1. Instrument Panel Light LevelControl. See Instrument Panel
Illumination Control 083.
2. Power Take Off (PTO) Main Switch. See Power Take-Off
(PTO) 0227.
3. Power Take Off (PTO) Engine Speed Control Switch. See
Power Take-Off (PTO) 0227. 4. Rear Body Interior Light
Switch. See Cargo Lamp 084.
5. Instruments, Warning Lights and Indicator Lights. See
Instrument Cluster 057.
6. Horn Button. See Horn053. 7. Rear Power Window Lock
Switch. See Power Windows
0 23.
8. Outside Rearview Mirror Heater Switch. See Heated
Mirrors 022.
9. Cruise Control Main Switch. See Cruise Control 0214.
10. Hazard Warning Flasher Switch. See Hazard Warning
Flashers 082.
11. Rear Power Window Switch. SeePower Windows 023.
12. Diesel Particulate Filter (DPF) Switch. See Diesel Particulate
Filter 0171.
13. Odometer Check Switch. See Odometer 058.
Engine Oil Level Check Switch.
See Engine Oil 0235.
14. Door Lock Switch. See Power
Door Locks 021.

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
14 Keys, Doors, and Windows
If you resell the vehicle, be sure to
hand over the plate with key code to
the new owner together with the
vehicle.
Remote Keyless Entry
(RKE) System
SeeRadio Frequency Statement
0 362.
If there is a decrease in the Remote
Keyless Entry (RKE) operating
range:
. Check the distance. The
transmitter may be too far from
the vehicle.
. Check the location. Other
vehicles or objects may be
blocking the signal.
. Check the transmitter's battery.
See “Replacing the Battery in
the Remote Control Unit” later in
this section.
. If the transmitter is still not
working correctly, see your
dealer or a qualified technician
for service.
Remote Keyless Entry
(RKE) System Operation
The keyless entry system allows
you to lock/unlock the doors by
simply pressing the remote control
button rather than inserting the key
into the lock.
The remote control unit works within
a 10 m (33 ft) radius of the cab
center as indicated in the figure.
The actual distance over which the
unit operates may vary depending
on conditions.
Unlocking and Locking the
Doors
Remote Control Unit
Unlocking
Press the unlock button (2) of the
remote control unit for 1 second or
longer. The vehicle's keyless entry
system causes the right and left turn
signal lights to simultaneously flash
twice upon receiving the signals
from the remote control unit.
Locking
Press the lock button (1) of the
remote control unit for 1 second or
longer. The vehicle's keyless entry

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
Keys, Doors, and Windows 15
system causes the right and left turn
signal lights to simultaneously flash
once upon receiving the signals
from the remote control unit.
Should you lose the remote control
unit, please contact your dealer.
After locking the doors using the
remote control unit, be sure to
check that they are locked by
pulling the door handles.
Avoid getting water on the remote
control unit, dropping it, hitting it
against another object, or stepping
on it; otherwise, the remote control
unit could malfunction.
Do not leave the remote control unit
on the dashboard or any other
surface where the unit might be
exposed to high temperatures
(exceeding 60°C/140°F). Doing so
may result in shorter battery life or
malfunction of the remote
control unit.
If the keyless entry system fails to
operate normally, lock and unlock
the doors using the key and have
the system inspected by your
dealer.The lock or unlock buttons on the
remote control unit must be fully
pressed for more than 1 second
to work.
If you do not open any doors within
about 30 seconds after pressing the
unlock button to unlock the doors,
the automatic locking function of the
system will lock the doors again to
prevent theft.
In areas near a TV tower, electric
power plant, radio station, etc. or
under any conditions involving
strong electrical disturbances, the
remote control unit operating range
might change or the keyless entry
system might not work.
The keyless entry system does not
operate in the following cases:
.
The engine control switch is in
the "ON" position.
. The key is inserted in the engine
control switch.
. One of the doors is open.Replacing the Battery in the
Remote Control Unit
When the battery runs down,
replace it. Battery life is
approximately two years.
Battery Used Number of
Battery
Lithium battery 1
Model number:
CR 2032
Voltage: DC3V
1. Battery Cover

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
Keys, Doors, and Windows 17
{Warning
When changing the battery, use
only a battery of the same type as
the original battery, or an
equivalent. Otherwise, there is a
risk of explosion.
Do not place the battery in direct
sunlight, or near a fire or other
sources of heat.
Be sure to install the battery with
the "+" and "-" sides correctly
oriented. Incorrect installation will
result in leakage of chemicals
from inside the battery or other
operational problems.
You and others could be seriously
injured.
The battery life varies depending on
how the remote control unit is used.
The battery has reached its end of
life when the remote control unit
works intermittently or does not
work at all. Replace the battery as
soon as this happens.
Getting In and Out of the
Vehicle
Carefully check that the area around
the vehicle is safe, hold the grip (1),
and place your foot on the step (2)
when getting in or out of the vehicle.
{Warning
When getting in or out of the
vehicle, make sure you use the
step and grips to support yourself (Continued)
Warning (Continued)
at 3 points. It is very dangerous to
stand on the tire or wheel when
getting in or out of the vehicle.
Furthermore, do not try to jump in
or out of the vehicle, as doing so
could cause unexpected
accidents or injuries.
Getting in or out of the vehicle
with oily or greasy hands or
shoes could cause you to slip.
Always thoroughly clean grease,
etc. from your hands and shoes
before getting in or out of the
vehicle.
Rain and snow can cause the
step to become very slippery.
Therefore, always remove snow
and ice from your shoes and the
step, and be careful not to slip
when getting in and out of the
vehicle.(Continued)

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
Keys, Doors, and Windows 21
Power Door Locks
Power Door Lock (Central
Door Lock)
How the Power Door Lock System
Operates
When you lock the driver's door
using the key or by operating the
lock button, the power door lock
system will automatically lock all
doors simultaneously.
Door Lock Switch
Both doors can be locked and
unlocked by pressing the power
door lock switch.
Vehicle Security
Guard Against Theft
Your new vehicle has many features
to help prevent theft of the vehicle,
its equipment and contents. But
these anti-theft features depend
upon you to work.
The time to be most on guard is
when leaving the vehicle:
.Park in a lighted spot when
you can.
. Turn the engine control switch to
"LOCK" and remove the key.
This locks the switch and the
steering controls. The selector
lever is not locked.
. Keep items that may appear to
be of value out of sight and
locked up when possible.
. Fully close all windows and lock
all doors.
Exterior Mirrors
Mirrors
Sit in the correct driving position
with the seat adjusted properly.
Then, check each mirror to ensure
that a proper view of the rear and
sides of the vehicle are provided.
Make adjustments and clean mirrors
if necessary.
Outside Rearview Mirrors
After properly adjusting your seat for
proper driving position, adjust the
mirrors so that they provide
adequate views for checking the
rear and the sides of the vehicle.
Adjust the outside rearview mirrors
by hand before vehicle operation.
This helps you determine the
location of objects seen in the
mirror. If the outside mirror fogs up,
warm up the outside rearview
mirror's face to defog.
See Heated Mirrors 022.

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
22 Keys, Doors, and Windows
{Warning
Before driving, be sure to adjust
the seat and mirrors to positions
that give you a correct driving
posture.
Do not adjust the outside mirrors
while operating the vehicle.
Adjust the mirrors when the
vehicle is stationary, not while the
vehicle is in motion.
When checking the rear of the
vehicle with mirrors, be careful
that this does not distract your
attention from the traffic ahead.
Outside mirrors may make the
vehicle behind you appear farther
away than it really is. Use these
mirrors very carefully until you are
able to correctly determine
distances from the images.(Continued)
Warning (Continued)
Keep the mirrors in mind when
passing another vehicle on a
narrow road, moving the vehicle
into a garage, or driving near
pedestrians.
Do not drive with the mirrors
folded.
You and others could be seriously
injured.
Heated Mirrors
If the outside rearview mirrors fog
up, press the outside rearview
mirror heater switch to defog them.
When the switch is pressed the
indicating light will illuminate. If the
switch is pressed once again, it will
switch to“OFF,”and the operation
indicating light will go out.
Do not use this switch while the
engine is shut down. Due to high
power consumption, the battery can
be discharged.
Turn off the switch as soon as
defogging is complete.

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
Seats and Restraints 29
{Warning
Do not adjust the reclining
seatback on the driver's seat
while the vehicle is moving. The
seatback could jerk and cause a
loss of control. You and others
could be seriously injured.
To recline the seatback, raise the
seatback tilt lever and gently lean
back to the desired position.To move the seatback forward, lean
forward with your back slightly clear
of the seatback and raise the lever.
After making adjustments, check
that the seatback is fully locked.
Suspension Adjustment
Avoid making any kind of contact
with the pointer on the scale. Doing
so may result in damage to the
pointer, preventing appropriate
weight adjustments from being
possible.
Before sitting on the seat, use the
knob to adjust the suspension to
suit your weight. Turn the knob
clockwise to move the pointer downthe scale and counterclockwise to
move it up the scale. The pointer
should be alongside your weight on
the scale.
The range of adjustment is
50-130 kg (110-290 lbs). If your
weight is outside this range, the
suspension may not be fully
effective. However, you will be able
to sit in the correct position for
driving.
Passenger
’s Seat/Center Seat
{Warning
Baggage must not be placed on
the center seat. If the baggage
falls on the floor when braking, it
may prevent the driver from
operating the pedals. 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
34 Seats and Restraints
Warning (Continued)
collision or sudden stop if it is in
contact with your neck and/
or face.
Every seat except the center seat
on your vehicle is equipped with a
three-point seat belt. The seat belt
extends or retracts freely if the
wearer moves slowly, but it locks
and restrains the occupant during
forward force caused by the
occupant's body following a strong
shock.To Fasten:
1. Sit on the seat in the correct driving position.
2. Pull out the seat belt holdingthe latch plate. After checking
that there are no twists in the
belt, insert the latch plate into
the buckle until it clicks. If the
retractor locks before the latch
plate reaches the buckle, let
the belt retract slightly, then
withdraw it slower than before.
3. To reduce the risk of slidingunder the belt during a
collision, position the belt
across your lap as low on your
hips as possible and adjust it to
a snug fit by pulling the
"shoulder" portion upward
through the latch plate.
The lap-shoulder belt is
designed to lock during a
sudden stop or impact. At other
times it should move freely.

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
36 Seats and Restraints
An expectant mother or a person
who is ill riding in the vehicle must
also wear a seat belt. In light of the
risk that the seat belt will apply
pressure to the abdomen, chest and
shoulders in the event of a collision,
however, an expectant mother or
person who is ill should get advice
from a physician beforehand.
.An expectant mother should use
a three-point seat belt.
. An expectant mother should
position the lap belt snugly as
low as possible on the hips (not
across the abdomen). Also, she
should fasten the shoulder belt
so it rests on her chest, not on
her abdomen.
Lap Belt
The center seat lap belt has no
retractor, but should be positioned,
worn, and released as described
below.
To Fasten:
1. Sit on the seat in the correct position.
2. Pull out the latch plate side ofthe belt a little longer than
necessary. Placing the latch
plate at right angles with the
belt makes this easier.3. After checking that there are notwists in the belt, insert the
latch plate into the buckle until
it clicks.

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
38 Seats and Restraints
Warning (Continued)
that may have entered the buckle.
Instead, arrange for inspection
and maintenance to be carried
out by your dealer. You and
others could be seriously injured.
A dirty seat belt can develop
retracting problems, and for this
reason, regular inspection and
upkeep are required.
Cleaning a Seat Belt Fold-Back
Fitting Portion
1. Seat belt fold-back fitting portion
2. Seat belt
3. Cloth
Cleaning a Seat Belt Fold-Back
Fitting Portion:
1. Fold a piece of cotton cloth, absorbent gauze, or the like of
approximately 50 mm (2 in) in
width into a rectangle.
2. Mix one part neutral detergent into approximately twenty parts
warm water.
3. Wet the cloth in the detergent mixture, pass it through the
fold-back fitting portion of the
belt, and slide it back and forth
and laterally until dirt can no
longer be seen.
4. Remove the cloth, remove moisture from the fitting portion
of the belt using a dry cloth,
and then allow it to dry
naturally out of direct sunlight.
5. Check to be sure the seat belt retracts and pulls out correctly. Avoid using anything like a tool to
pass the cloth through the fold-back
fitting portion or try to remove
stubborn dirt. Using such an object
can result in plastic parts or seat
belt webbing damage.
Cleaning a Belt Webbing
1. Brush
2. Seat belt
Cleaning a Belt Webbing:
1. Fully extract the belt and examine for any difference in
color between the front and
back surfaces.