2020 CHEVROLET LOW CAB FORWARD check engine

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
26 Seats and Restraints
Seats and
Restraints
Front Seats
Seat Position . . . . . . . . . . . . . . . . . . 26
Rear Seats
Rear Seats (CrewCab Only) . . . . . . . . . . . . . . . . . . . . 30
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 31
Three-Point Seat Belt . . . . . . . . . . 33
Seat Belt Use DuringPregnancy . . . . . . . . . . . . . . . . . . . . 35
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . 36
Seat Belt Extender . . . . . . . . . . . . . 37
Safety System Check . . . . . . . . . . 37
Seat Belt Care . . . . . . . . . . . . . . . . . 37
Child Restraints
Child Restraint Systems . . . . . . . 39
Front Seats
Seat Position
{Warning
Use caution when adjusting the
seat, as failure to do so could
cause injury. You and others
could be seriously injured.
{Warning
Never allow children to adjust
their seats themselves; an adult
should adjust the seat for
occupants who are children. You
and others could be seriously
injured.
{Warning
Adjust the seat only before you
start driving. Adjusting the seat
while the vehicle is in motion
must be avoided not only
because the unlocked seat will
move back and forth unstably,
preventing you from taking the
correct position, but might also
cause you to lose control of the
vehicle, possibly resulting in an
accident. You and others could be
seriously injured.
{Warning
Try to move the seat without
unlatching it after making
adjustments to check that it is
completely locked. A loosely
locked seat may move
unexpectedly and your position
might then become unstable; this
could lead to an accident. Take
(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
Seats and Restraints 27
Warning (Continued)
the vehicle to your dealer for
service if you find that your seat
adjusters do not latch. In addition,
the seat belt will not operate
properly if the seatback is not
completely locked. You and
others could be seriously injured.
{Warning
Driving with the seat excessively
reclined could be very dangerous
in the event of a collision or
sudden stop. Raise the seatback,
and apply the seat belt correctly
while sitting straight in the seat.
You and others could be seriously
injured.
{Warning
Do not place a cushion or similar
object between your back and the
seatback. Doing so not only
affects the stability of your driving
position but also prevents the
seat belt from working effectively
in the event of a collision. You
and others could be seriously
injured.
{Warning
Do not place any objects under
the seat. If there are any objects
under the seat, the seat could be
locked in an improper position.
You and others could be seriously
injured.
{Warning
Before making adjustments,
check that the seat rails are free
of anything that could obstruct the
locking of the seat. Be careful that
your hand or foot does not
become trapped in the seat or
rails when adjusting the seat. You
and others could be seriously
injured.
{Warning
When adjusting the seat, be
careful that the seat does not hit
passengers or objects. Doing so
could cause injury to passengers,
or damage objects. 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
28 Seats and Restraints
{Warning
Make sure not to hit passengers
or luggage when adjusting your
seat. You and others could be
seriously injured.
{Warning
When adjusting the seat, or when
getting up from the seat, do not
put your hand or other objects
under the seat or near moving
parts. Doing so could cause injury
or damage to objects.
Driver’s Seat
The driver's seat must be adjusted
so that when you sit well back in the
seat, you can fully press the pedals
without moving your back from the
seatback, and you can operate the
steering wheel easily and freely.
After making adjustments, check
that the seat is completely locked. Adjusting the seat for a correct
driving posture is a fundamental
part of safe driving.
Forward/backward Adjustment
While raising the unlock lever, move
the seat forward or backward.
Release the lever when the seat is
in the desired position. After making
adjustments, try to move the seat
back and forth to check that it is
fully locked.
Reclining Adjustment
{Warning
To reduce the risk of sliding under
the lap belt during a collision, an
occupied reclining seat should not
be reclined any more than
needed for comfort. The seatback
and seat belts provide best
restraint only when the rider is
sitting well back and straight up in
the seat. (The lap belt is designed
to spread the force of a collision
over the hipbone. If you are
reclined, the lap belt may slide
past your hips and apply restraint
forces directly to the abdomen.
Therefore, in the event of a
collision, the risk of personal
injury will increase with increasing
recline of the seatback). 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
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
32 Seats and Restraints
Warning (Continued)
and be seriously injured. Seat
belts work best only when the
occupant is sitting well back and
straight up in the seat.
Be sure to insert the latch plate
into the buckle until a click is
heard. An incompletely inserted
latch plate is dangerous in the
event of a collision or
sudden stop.
Do not run the seat belt over your
face, chin or neck.
Wear the seat belt as low as
possible around the hips, not
around the waist. A seat belt
running over the waist would
press the abdomen with a strong
force and could increase the
likelihood of injuries in a collision
or sudden stop.
Do not use a seat belt for a small
child if the belt is on or very close
to the child's neck or chin. Also,(Continued)
Warning (Continued)
do not use a seat belt if it does
not fit snugly over the child's hips
because restraining the child
under those conditions could be
dangerous in the event of a
collision or sudden stop. Instead,
use an appropriate child restraint
system available on the market.
For further details, please contact
your dealer.
Use a child restraint system that
fits the size of the infant or child.
Install the system according to
the manufacturer's instructions.
Children who have outgrown child
restraint systems should use the
vehicle's seat belts.
Remove any twists in the seat
belt before fastening it. A seat
belt with twists will not provide full
protection because it cannot(Continued)
Warning (Continued)
disperse shocks efficiently in the
event of a collision or
sudden stop.
Too much slack could increase
the amount of injury because the
belt would not be able to properly
restrain you in an accident.
Do not put the lap portion of a
seat belt over any armrest.
Do not wear a shoulder belt under
your arm nearest the door.
Do not let a buckle release button
face downward or inward.
Expectant mothers or people
suffering from chest or abdominal
conditions should check with their
doctor for specific
recommendations about wearing
seat belts.(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
Seats and Restraints 33
Warning (Continued)
Do not use one seat belt for more
than one person. If worn by more
than one person, the seat belt
would not work effectively in a
collision or sudden stop.
Have seat belts inspected and,
if necessary, replaced by the
nearest dealer when the webbing
becomes frayed or worn and/or
when the buckle or other
mechanical parts fail to work
properly.
If your vehicle has been involved
in a collision, the seat belts worn
at the time may have lost their
original strength due to impact
even if they appear intact. These
seat belts must be inspected and,
if necessary, replaced by the
nearest dealer.(Continued)
Warning (Continued)
Be careful to keep the buckles
and retractors free of dust and
foreign matter. (This may jam the
retractor or damage the belt.)
Do not let the belt system
become damaged by the door
or seat.
Do not let the belt twist while it is
rewinding: it may cause the
retractor to jam so it will not
rewind further. If it is not fully
rewound, the belt cannot be
pulled out. Should the belt jam,
you may be able to release it by
working the belt in and out until
the belt rewinds far enough to
unlock. However, if the belt
remains jammed or other parts of
the restraint system do not work
properly, have your dealer
service it.(Continued)
Warning (Continued)
Wearing seat belts is a legal
requirement. All other passengers
must wear seat belts. The driver
is responsible not only for
wearing a seat belt himself/herself
but also for prompting all
passengers to wear their seat
belts. It is necessary, however, to
check with a doctor about the
appropriateness of a seat belt for
an expectant mother or a
passenger with a chest/abdominal
condition.
Three-Point Seat Belt
{Warning
The shoulder belt should be
adequately positioned on your
shoulder but should not touch
your neck and/or face. The
shoulder belt could harm you in a
(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
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.