stop start CHEVROLET LOW CAB FORWARD 2018 Service Manual

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
Driving and Operating 213
4. Fully retighten the air bleedplug (2) and wipe off any fuel
that may have adhered to the
plug or surrounding area.
5. Continue to operate the pump for 50 times.
6. Start the engine.
7. If the engine does not start, repeat steps 5 and 6 as
necessary until it does start.
After Starting the Engine 1. Without pressing the accelerator pedal, start the
engine.
2. After the engine has started, allow it to idle for about
5 seconds.
3. Fully press the accelerator pedal and increase the engine
speed to the maximum speed
for 10 seconds. (Repeat this
operation several times.)
Insufficient air bleeding can result in
faulty engine operation. Be sure,
therefore, to always carry out the
previous steps under "After starting
the engine".Filling the Tank
Be sure to obey the following
instructions when refueling the
vehicle:
. Stop the engine and close the
vehicle's doors and windows.
. Keep cigarettes and other
flames away from the vehicle.
. Before opening the fuel tank
filler cap, touch a metallic object
to discharge static electricity
from your body.
. When filling, place the nozzle
deeply into the fuel tank. If you
try to fill more fuel by pulling out
the nozzle from the fuel tank, the
fuel may spill out, thus causing
danger.
. Be sure to wipe off the fuel that
is spilled at refueling.{Warning
Fuel vapor is highly flammable.
Be careful not to inhale fuel vapor
when refueling the vehicle.
If you have a static charge
buildup on your body while
refueling the vehicle, a spark
caused by its discharge could
ignite the fuel, resulting in burns.
All parts of the refueling
procedure (from opening the fuel
tank filler cap to completing the
refueling and closing the fuel tank
filler cap) must be performed by
the same person.
Other people may be carrying
static electricity. Do not allow
them to approach the fuel filler.
The person performing the
refueling procedure must not
return to the seat in the cab
part-way through the procedure.
(Continued)

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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Vehicle Care 217
Vehicle Care
General Information
General Information . . . . . . . . . . 218
California Proposition65 Warning . . . . . . . . . . . . . . . . . 218
California Perchlorate Materials Requirements . . . . . 218
Accessories and Modifications . . . . . . . . . . . . . . . . 218
Vehicle Checks
Doing Your OwnService Work . . . . . . . . . . . . . . . 218
Cab Tilting . . . . . . . . . . . . . . . . . . . . 220
Engine Compartment Overview . . . . . . . . . . . . . . . . . . . . 222
Engine Cover . . . . . . . . . . . . . . . . . 222
Engine Oil . . . . . . . . . . . . . . . . . . . . 223
Automatic Transmission Fluid . . . . . . . . . . . . . . . . . . . . . . . . 229
Engine Air Cleaner/Filter . . . . . . 231
Engine Coolant . . . . . . . . . . . . . . . 231
Engine Overheating . . . . . . . . . . 237
Power Steering Fluid . . . . . . . . . 240
Washer Fluid . . . . . . . . . . . . . . . . . 241
Brakes . . . . . . . . . . . . . . . . . . . . . . . 242
Brake Fluid . . . . . . . . . . . . . . . . . . . 246
Battery . . . . . . . . . . . . . . . . . . . . . . . . 247
Fuel Filter . . . . . . . . . . . . . . . . . . . . 248 Rear Axle (Gear Oil Viscosity
Chart) . . . . . . . . . . . . . . . . . . . . . . . 249
Rear Axle (Oil Level Check) . . . . . . . . . . . . . . . . . . . . . . 249
Noise Control System . . . . . . . . 250
Automatic Transmission Shift
Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 251
Wiper Blade Replacement . . . . 252
Headlamp Aiming
Headlamp Aiming . . . . . . . . . . . . 254
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . 254
Headlamps and Front Turn Signal . . . . . . . . . . . . . . . . . . . . . . . 257
Roofmarker Lamps . . . . . . . . . . . 261
Sidemarker Lamps (Including Turn Signal and Cornering
Lamps) . . . . . . . . . . . . . . . . . . . . . . 261
Taillamps, Turn Signal, Stoplamps, and Back-Up
Lamps . . . . . . . . . . . . . . . . . . . . . . 263
License Plate Lamp . . . . . . . . . . 263
Interior Lamps . . . . . . . . . . . . . . . . 264
Electrical System
Electrical System Overload . . . 264
Wheels and Tires
Wheels and Tires . . . . . . . . . . . . . 272 Tire Pressure . . . . . . . . . . . . . . . . . 284
Tire Rotation . . . . . . . . . . . . . . . . . 284
If a Tire Goes Flat . . . . . . . . . . . . 287
Jump Starting
Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . 287
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . 291
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . 293
Interior Care . . . . . . . . . . . . . . . . . . 299

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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224 Vehicle Care
Checking the Engine Oil Level
Press the engine oil level check
switch. If engine oil level is low the
red oil pressure warning light will
turn on. If the engine oil level is
above the "OK", the green oil level
indicator will turn on.
The oil level varies while the engine
is running, right after it is stopped,
and on sloping ground. When
checking the oil level, be sure the
vehicle is on level ground while the
engine is cool.
The engine oil level must be kept at
the right level to help assure proper
lubrication of your vehicle's engine.It is the owner's responsibility to
check the oil level at regular
intervals (such as every fuel stop),
according to the following
instructions. Park the vehicle on a
level surface and check the engine
oil level before starting or at least
30 minutes after turning off the
engine.
1. Remove the oil dipstick (2) and
wipe off any oil on the oil
dipstick.
2. Reinsert the oil dipstick fullyand then gently remove it.
The oil is at the correct level if
the oil level is between the
"FULL" and "MIN" marks.
3. If the oil level is too low, add oil to the "FULL" mark.
4. Reinstall the oil dipstick into position after checking the oil
level.
Any oil level above the "FULL" mark
on the oil dipstick may cause engine
malfunctions.
The oil level cannot be checked
correctly when the engine is
running.

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Vehicle Care 239
Warning (Continued)
refilling, and replacement of
coolant only when its temperature
has cooled.
When removing the radiator cap
and reserve tank cap, use a thick
cloth to cover the cap and turn it
little by little.
You and others could be seriously
injured.
4. If no steam or engine coolant can be seen or heard from the
engine compartment:
.Tilt the cab or open the
engine access cover.
‐If the engine coolant is
boiling, wait until it stops
before proceeding.
‐ Look at the see-through
reserve tank. The
engine coolant level
should be between the
"MAX" and "MIN" lines
on the reserve tank. ‐
If necessary, pour
engine coolant (See
Engine Coolant 0231
for the proper coolant
and water mixture) into
the reserve tank only,
not directly into the
radiator. Also, do not
check engine coolant
level at the radiator.
. Make sure the fan belts are
not broken, or off the
pulleys, and that the fan
turns when the engine is
started. Make sure the fan
blade and pulleys are not
broken.
. Check the radiator hoses
and connections, heater
hoses and connections,
radiator, water pump, EGR
cooler, and SCR system
and hoses for leakage.
If you do not find a leak or
other problem, carefully add
engine coolant to the
reserve tank. If the engine coolant level in
the reserve tank is at the
correct level but there is still
an indication on the
instrument panel of an
overheat condition:
You must let the engine
cool first. You may then add
engine coolant directly to
the radiator. See
“Adding
Engine Coolant” under
Engine Coolant 0231.
5. Inspect to see if there is any dirt, etc. attached to the front
surface of the radiator. Also,
inspect to see if there is
anything blocking the core.
If there is anything attached,
clean and remove it.
6. After the inspection, regardless of the vehicle condition, please
contact the nearest dealer.
Once the engine coolant
temperature gauge no longer
signals an overheat condition, you
can resume driving at a reduced
speed. Return to normal driving

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242 Vehicle Care
Follow the instructions provided with
the windshield washer fluid
regarding the ratio for mixing with
tap water.
Poor quality products, engine
coolant, and soapy water must not
be used. Failure to observe this
precaution can result in nozzle
blockage or damage to painted
surfaces.
The washer should never be used
while the tank is empty. Operating
the washer with the tank empty can
result in motor damage.
Brakes
For the most effective braking and
for maximum life from brake system
components, follow these
suggestions:
.Keep any obstructions from
interfering with brake pedal
travel.
. Keep tires properly inflated.
Improperly inflated tires can
reduce the efficiency of the
brakes. Follow the recommendations for
brake checks in the Maintenance
Schedule.
GM replacement brake lining
material is recommended for this
vehicle to maintain the balance
between front and rear brake
performance. GM replacement
brake parts have been carefully
selected to provide the proper brake
balance for purposes of both
stopping distance and controllability
over the full range of operating
conditions. Installation of front or
rear brake lining material with
performance different from that of
the replacement parts
recommended for this vehicle can
change the intended brake balance
of this vehicle.
Checking the Brake Electric
Vacuum Pump (4500HD/
4500XD Series)
1. Turn the engine control switch
to the "ON" position (do not
start the engine), and press the
brake pedal several times. 2. Check for the noisy sound of
the electric vacuum pump
inside the instrument panel at
the same time as vacuum
warning buzzer sound, and
check that the brake low
vacuum warning light
comes on.
3. Then, start the engine. The main vacuum pump driven by
the engine will start running.
If the electric vacuum pump
operation (noisy sound) and
the vacuum warning buzzer
stop, and the brake low
vacuum warning light goes off
thereafter, the operation is
normal.
4. If you cannot hear the noisy sound or the noisy sound stays
on all the time, have the
vehicle inspected by the
nearest dealer immediately.Hydraulic Brake Booster (HBB)
The 5500HD, 5500XD models are
equipped with an HBB system. HBB
is a brake booster device that

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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Vehicle Care 287
{Warning
If you find any abnormal
conditions with the wheel nuts
such as frequent loosening of
retightened nuts, have your
vehicle checked or serviced at the
nearest dealer as soon as
possible.
Fully engage the wheel wrench on a
wheel nut in order to tighten the nut
to the specified torque. However, do
not use a pipe as a handle
extension or your foot to apply force
on the wrench. This would tighten
the nut more than required and
might damage components.
Both under-tightening and
over-tightening of wheel nuts may
cause broken wheel studs or
cracked disc wheels and could lead
to wheel detachment. Adhere to the
specified tightening torques.
When replacing a tire with a new
one, use only a tire of the same
type and size as the replaced tire;
otherwise, driving safety could be affected. Avoid mixed use of
different types or different size tires
at all costs.
If a Tire Goes Flat
When the tire goes flat while driving,
ease off the accelerator pedal, avoid
hard braking, hold on to the steering
wheel firmly, and stop the vehicle.
The tire should be changed in a
safe, open location to prevent
obstructing other vehicles or
pedestrians.
{Warning
If you continue to drive on a flat
tire, undue force will be applied to
the wheel studs, possibly causing
the studs to break and the wheel
to come off. You and others could
be seriously injured.
See “Tire Replacement
Recommendations” underWheels
and Tires 0272.
Jump Starting
Jump Starting - North
America
When the Battery is
Discharged
Use a jumper cable (sold
separately) and the battery of
another vehicle to start the engine in
the following sequence.
{Danger
Follow the precautions listed in
the jump starting instructions
when working on or near the
battery. Personal injury
(particularly to eyes) or property
damage may result from battery
explosion, battery fluid or
electrical (short circuit) burns.
If battery fluid should come in
contact with an eye, immediately
wash away using a large amount
of water and continue washing for
(Continued)

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288 Vehicle Care
Danger (Continued)
at least 5 minutes. Following this,
you should seek medical
assistance.
When using tools or other metal
objects in the vicinity of the
battery, take care to prevent them
from coming into contact with the
positive terminal. As the vehicle
itself will conduct electricity, any
such contact can result in a
short-circuit and a highly
dangerous electric shock.
A vehicle battery generates
extremely flammable hydrogen
gas. For this reason, operations
producing sparks or requiring the
usage of an open flame must
never be carried out near a
vehicle battery. Failure to observe
this precaution can result in
explosion if the hydrogen gas
ignites. Whenever wiping up
battery fluid, a damp cloth should
be used.(Continued)
Danger (Continued)
Batteries produce explosive
gases, contain corrosive acid,
and supply levels of electrical
current high enough to cause
burns. Therefore, to reduce the
risk of personal injury when
working near a battery:
. Always shield your eyes
and avoid leaning over a
battery whenever possible.
. Do not expose a battery to
open flames or sparks.
. Do not allow battery acid to
contact eyes or skin. Flush
any contacted area with
water immediately and
thoroughly, and get
medical help.
. Follow each step in the
jump starting instructions.
Always stop the engine whenever
the battery is to be inspected. (Continued)
Danger (Continued)
Dilute sulfuric acid is used as the
battery fluid. Special care must be
taken to ensure that this fluid
does not come into contact with
skin, clothing, or metal surfaces.
When disconnecting the cables
from the terminals, start with the
negative terminal. When
connecting them, the negative
terminal should be
reconnected last.
You and others could be seriously
injured.

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Service and Maintenance 319
6. Checks performed after theengine startup
.Oil, engine coolant, fuel,
brake fluid and power
steering fluid leaks
. Inspect the exhaust system,
checking that the tailpipe is
clear
7. Checks performed while driving the vehicle
.Brake effectiveness
. Engine abnormal noises
Keep the Floor Around the Driver
Seat Clean and Tidy
{Warning
It is extremely dangerous to have
empty cans, empty bottles,
or other items rolling around on
the floor because they could get
trapped under the brake pedal
and prevent brake application.
For proper pedal operation, it is
also essential to lay floor mats (Continued)
Warning (Continued)
properly. Incorrectly installed floor
mats would hinder free movement
of the pedals.
Do not use the dashboard pocket
or the top of the dashboard as a
place to put items that could roll,
which could interfere with your
driving. You and others could be
seriously injured.
Choose Your Footwear Suitable
for Driving
{Warning
Choose footwear that ensures
proper operation of pedals when
driving the vehicle. Use of
footwear unsuitable for driving
may cause an accident. The
driver could be seriously injured
when not wearing the proper
footwear.
Electrical System
Following the after-delivery service,
it is the owner's responsibility to
check all wiring periodically for
cracked, chafed or oil-soaked
insulation and maintain it in a clean
and tight condition to ensure
satisfactory operation of the
electrical system.
Headlights and Turn Signal
Lights
Turn the engine control switch to the
"ON" position, and then check the
way in which the headlights, turn
signal lights, and other exterior
lights come on and flash. In
addition, press the brake pedal to
confirm whether the stop lights
come on, and shift the transmission
to "R" position to confirm whether
the back up lights come on. Also
examine the lights for discoloration,
damage, and looseness.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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356 Index
Proposition 65 Warning,California . . . . . . . . . . . . . . . . . 218, 287
R
Radio Frequency Statement . . . . 348
Radio Reception . . . . . . . . . . . . . . . . 101
Radios
AM-FM Radio . . . . . . . . . . . . . . . . . . . 97
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 249
Rear Seats . . . . . . . . . . . . . . . . . . . . . . 42
Rear Storage . . . . . . . . . . . . . . . . . . . . 57
Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . 326
Reduced Engine Power Light . . . . 81
Reimbursement Program, GM Mobility . . . . . . . . . . . . . . . . . . . 344
Remote Keyless Entry (RKE)
System . . . . . . . . . . . . . . . . . . . . . . . . . 26
Replacement Parts Maintenance . . . . . . . . . . . . . . . . . . 328
Reporting Safety Defects
General Motors . . . . . . . . . . . . . . . 349
U.S. Government . . . . . . . . . . . . . 349
Roads Driving, Wet . . . . . . . . . . . . . . . . . . 132
Roadside Assistance
Program . . . . . . . . . . . . . . . . . . . . . . . 344
Roofmarker Lamps . . . . . . . . . . . . . 261
Rotation, Tires . . . . . . . . . . . . . . . . . . 284 Routing, Engine Drive Belt . . . . . . 341
Running out of Fuel . . . . . . . . . . . . . 212
Running the Vehicle While
Parked . . . . . . . . . . . . . . . . . . . . . . . . 160
S
Safety Defects ReportingGeneral Motors . . . . . . . . . . . . . . . 349
U.S. Government . . . . . . . . . . . . . 349
Safety System Check . . . . . . . . . . . . 49
Scheduling Appointments . . . . . . . 345
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . 43 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Extender . . . . . . . . . . . . . . . . . . . . . . . . 49
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . 48
Reminders . . . . . . . . . . . . . . . . . . . . . . 73
Three-Point . . . . . . . . . . . . . . . . . . . . . 45
Use During Pregnancy . . . . . . . . . . 47
Seats Position, Front . . . . . . . . . . . . . . . . . . 38
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Security Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 33
Selector Lever . . . . . . . . . . . . . . . . . . 194
Service . . . . . . . . . . . . . . . . . . . . . . . . . 120 Accessories and Modifica-
tions . . . . . . . . . . . . . . . . . . . . . . . . 218
Climate Control System . . . . . . . .115
Doing Your Own Work . . . . . . . . 218 Service (cont'd)
Publications Ordering Infor-
mation . . . . . . . . . . . . . . . . . . . . . . 347
Scheduling Appointments . . . . . 345
Transmission Warning Light . . . . 78
Vehicle Soon Light . . . . . . . . . . . . . . 74
Shift Lock Control Function Check, Automatic Trans-
mission . . . . . . . . . . . . . . . . . . . . . . . . 251
Shopping Bag Hooks . . . . . . . . . . . . 58
Sidemarker Lamps . . . . . . . . . . . . . 261
Signals, Turn and Lane-- Change . . . . . . . . . . . . . . . . . . . . . . . . 94
Specifications and Capa-
cities . . . . . . . . . . . . . . . . . . . . . . . . . . 335
Speedometer . . . . . . . . . . . . . . . . . . . . 71
Starting and Stopping the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . 149
Steering . . . . . . . . . . . . . . . . . . . . . . . . 131 Fluid, Power . . . . . . . . . . . . . . . . . . 240
Wheel Adjustment . . . . . . . . . . . . . . 65
Stoplamps and Back-up Lamps Bulb Replacement . . . . . . . . . . . . 263
Storage Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Storage Areas Glove Box . . . . . . . . . . . . . . . . . . . . . . 55

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Index 357
Storage Areas (cont'd)Information on Loading the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . 58
Instrument Panel . . . . . . . . . . . . . . . 55
Storage Compartments . . . . . . . . . . 54
Stuck Vehicle . . . . . . . . . . . . . . . . . . . 136
Sun Visors . . . . . . . . . . . . . . . . . . . . . . . 37
System Noise Control . . . . . . . . . . . . . . . . . 250
T
Tachometer . . . . . . . . . . . . . . . . . . . . . . 72
TaillampsBulb Replacement . . . . . . . . . . . . 263
Temperature, Operating . . . . . . . . 153
Text Telephone (TTY) Users . . . . 343
Three-Point Seat Belt . . . . . . . . . . . . 45
Tires If a Tire Goes Flat . . . . . . . . . . . . 287
Pressure . . . . . . . . . . . . . . . . . . . . . . 284
Rotation . . . . . . . . . . . . . . . . . . . . . . 284
Tires and Wheels . . . . . . . . . . . . . . . 272
Towing Vehicle . . . . . . . . . . . . . . . . . . . . . . . 291
Trademarks and License Agreements . . . . . . . . . . . . . . . . . . . 114
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . 185
Fluid, Automatic . . . . . . . . . . . . . . 229 Transmission (cont'd)
Overdrive Off, Automatic . . . . . . 195
Service Warning Light . . . . . . . . . . 78
Trip Odometer . . . . . . . . . . . . . . . . . . . 71
Turn and Lane-Change
Signals . . . . . . . . . . . . . . . . . . . . . . . . . 94
Turn Signal Bulb Replacement . . . . . . . . . . . . 263
U
USB Port . . . . . . . . . . . . . . . . . . . . . . . 110
Using This Manual . . . . . . . . . . . . . . . . 3
V
VehicleControl . . . . . . . . . . . . . . . . . . . . . . . 122
Getting In and Out . . . . . . . . . . . . . . 29
Identification Number (VIN) . . . 330
Messages . . . . . . . . . . . . . . . . . . . . . . 86
Security . . . . . . . . . . . . . . . . . . . . . . . . 33
Service Soon Light . . . . . . . . . . . . . 74
Starting and Stopping . . . . . . . . . 149
Towing . . . . . . . . . . . . . . . . . . . . . . . . 291
Vehicle Care
Tire Pressure . . . . . . . . . . . . . . . . . 284
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . . . . . . . . . . 349
Ventilation, Air . . . . . . . . . . . . . . . . . . 118
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
W
Wait to Start Light . . . . . . . . . . . . . . . 79
Warning Brake System Light . . . . . . . . . . . . . 75
Caution and Danger . . . . . . . . . . . . . 3
Warning Buzzers . . . . . . . . . . . . . . . . 91
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . . 69
Warnings Hazard Flashers . . . . . . . . . . . . . . . . 94
Washer Fluid . . . . . . . . . . . . . . . . . . . 241
Water in Fuel . . . . . . . . . . . . . . . . . . . 209
Wheels and Tires . . . . . . . . . . . . . . . 272
Windows Power . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Windshield Wiper/Washer . . . . . . . . . . . . . . . . . . 66
Winter Driving . . . . . . . . . . . . . . . . . . . . . . . . 133
Winter Cover . . . . . . . . . . . . . . . . . . . 154
Wiper Blade Replacement . . . . . . 252