service CHEVROLET LOW CAB FORWARD 2019 Manual Online

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
350 Service and Maintenance
UsageFluid/Lubricant
Engine Oil Engine oils with the letters CK-4 are required for your vehicle. The CK-4
designation can appear either alone or in combination with other American
Petroleum Institute (API) designations, such as API CK-4/SL. These letters
show API levels of quality. To determine the preferred viscosity for your
vehicle's diesel engine, see Engine Oil0245.
Hydraulic Brake Booster (If
Equipped) DEXRON
®-VI Automatic Transmission Fluid.
Power Steerig Fluid DEXRON
®-VI Automatic Transmission Fluid.
Rear Axle Multi purpose gear oil SAE80W-90 GL-5, SAE90 GL-5
Rear Axle
(Limited slip differential (LSD)) Multi purpose gear oil SAE80W-90 GL-5, SAE90 GL-5 for limited slip
differential together with limited slip differential lubricant additive (GM
Part No. 88900330) or equivalent.
Windshield Washer Solvent Automotive windshield washer fluid that meets regional freeze protection
requirements.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Service and Maintenance 351
Be sure to use the LSD gear oil
additive mentioned above in
vehicles equipped with limited slip
differentials, and ensure there is an
appropriate amount of the LSD gear
oil additive, otherwise a chattering
noise and/or excessive vibration
may occur when turning.
If abnormal noises occur despite
having used the specified LSD gear
oil additive, have it inspected and
serviced at your dealer.Maintenance
Replacement Parts
Replacement Parts
Please contact your dealer for
genuine GM parts.
{Warning
If part replacement is necessary,
the part must be replaced with
one of the same part number or
with an equivalent part. Use of a
replacement part of lesser quality
may result in personal injury or
damage to the vehicle.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
352 Service and Maintenance
5.2L Diesel
PartGM Part Number
Engine Air Cleaner 97780479
Engine Oil Filter 98298404
Fuel Filter: Engine Side 98147525
Fuel Filter: Chassis Side 98037481
Replacement Fasteners
During vehicle maintenance, any
fasteners used to replace older
ones must have the same
measurements and strength as
those removed, whether metric or
customary. Fasteners taken from
the vehicle should be saved for
reuse in the same location when
possible. Where a fastener cannot
be used again, take care to choose
a replacement that matches the old
one. For information and help, see
your dealer.{Warning
This vehicle is primarily
dimensioned in the metric system.
Most fasteners are metric and
many are very close in dimension
to well-known customary
fasteners in the inch system.
Mismatched or incorrect fasteners
can result in damage to the
vehicle or possibly personal
injury.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Technical Data 357
Vehicle Data
Capacities and Specifications
These specifications are given here for information only. Before using them, see the Cautions and other instructions
throughout this
manual–the index may help you locate such items. For more information, see the Service Manual covering the
chassis or body part in question. Your dealer may also be able to help.
Engine Specifications
Description Water-cooled, overhead camshaft, direct injection engine with a charge air cooled
turbocharger.
Manufacturer Isuzu
Model 4HK1–5.2L Diesel Engine
Engine type Inline 4, Four Cycle
Induction Turbocharged W/Charge Air Cooler
Bore 115 mm
Stroke 125 mm
Displacement 5.193 L (317 CID)
Full load RPM 2,400 rpm
Compression ratio 16.5 to 1
Firing order 1-3-4-2
Fuel injection timing
(static) degree 0°

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Technical Data 359
Service SpecificationsWeights
Axle weight rating : Front 4500HD: 2431 kg (5,360 lb) 4500XD: 3007 kg (6,630 lb)
5500HD: 3098 kg (6,830 lb) 5500XD: 3300 kg (7,275 lb)
Engine Oil
Engine oil capacity When changing oil and filter: 11.0 L (11.6 qt)
*1
Engine Cooling System
Capacity 19.6 L (20.7 qt)
Engine oil Thermostat:
Starts to open 82–85 °C (180–185 °F)
Radiator pressure 108 kPa (16 psi) Transmission
Transmission oil capacity 13.1 L (27.7 pt)
*3
Rear Axle
Differential gear oil
capacity 4500HD/4500XD:
9.0 L (19.0 pt)
*4
5500HD/5500XD:10.0 L (21.1 pt)*4

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Technical Data 361
Disc Brakes
Model 4500HD 4500XD/5500HD/5500XD
Brake size (Diameter x
Thickness) φ293 x 40 mm (φ11.54 x 1.57 in)
φ363 x 42 mm (φ14.29 x 1.65 in)
Rotor thickness [Standard Value] 40.0 mm (1.575 in) 42.0 mm (1.654 in)
[Usable Limit] 37.0 mm (1.457 in) 39.0 mm (1.535 in)
Pad thickness [Standard Value] 13.0 mm (0.512 in) 13.0 mm (0.512 in)
[Usable Limit] 1.0 mm (0.04 in) 1.0 mm (0.04 in) Service Brakes
Brake pedal free play 4500HD/4500XD 5–10 mm (0.20–0.39 in)
5500HD/5500XD 5–10 mm (0.20–0.39 in)
Clearance between the brake pedal and the brake pedal bracket with a pressure of 490 Y(50 kgf/110 lb ft)
applied to the brake pedal
4500HD/4500XD models 35 mm (1.38 in) or more
Clearance between the brake pedal and the brake pedal bracket with a pressure of 294 Y(30 kgf/66 lb ft) applied
to the brake pedal
5500HD/5500XD models 35 mm (1.38 in) or more

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Technical Data 363
Engine Drive Belt Routing
Fan Belt and Air Conditioning
Compressor Belt
See theMaintenance Schedule
0 327.
No. Name
1 Fan belt
2 Fan pulley
3 A/C belt
4 A/C compressor
5 Tension pulley
6 Crank pulley No.
Name
7 Alternator
If your air conditioning system is
functioning properly, it is not
necessary to remove and replace
the refrigerant or compressor oil.
. A V-ribbed belt is used for the
fan belt. This type of belt
requires the tension to be
adjusted more accurately than is
required with the conventional V
belt. Inappropriate tension could
cause the belt to make noise or
break. When the fan belt is
damaged, electricity is not
properly generated or becomes
a cause of engine overheating.
You must check the tension of
the fan belt carefully.
. Use dealer-certified genuine
parts when changing the
fan belt.
. Have the vehicle inspected and
serviced at your dealer. .
The air conditioning drive belt,
if equipped, must be adjusted
after fan belt adjustment. If the
belt is not adjusted properly, the
A/C belt may experience
excessive tension, and possible
premature failure.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
364 Customer Information
Customer
Information
Customer Information
Customer SatisfactionProcedure . . . . . . . . . . . . . . . . . . . 364
Customer Assistance Offices . . . . . . . . . . . . . . . . . . . . . . 365
Customer Assistance for Text Telephone (TTY) Users . . . . . 365
Online Owner Center . . . . . . . . . 365
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . 366
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . 367
Scheduling Service Appointments . . . . . . . . . . . . . . . 367
Collision Damage Repair . . . . . 368
Publication Ordering Information . . . . . . . . . . . . . . . . . . 370
Radio Frequency Statement . . . . . . . . . . . . . . . . . . . 370
Reporting Safety Defects
Reporting Safety Defects tothe United States
Government . . . . . . . . . . . . . . . . . 371 Reporting Safety Defects to
General Motors . . . . . . . . . . . . . 371
Vehicle Data Recording and
Privacy
Vehicle Data Recording andPrivacy . . . . . . . . . . . . . . . . . . . . . . 372
Customer Information
Customer Satisfaction
Procedure
Your satisfaction and goodwill are
important to your dealer and to
Chevrolet. Normally, any concerns
with the sales transaction or the
operation of the Chevrolet chassis,
or upfitted rear body will be resolved
by your dealer's sales or service
departments. Sometimes, however,
despite the best intentions of all
concerned, misunderstandings can
occur. If your concern has not been
resolved to your satisfaction, the
following steps should be taken:
STEP ONE : Discuss your concern
with a member of dealership
management. Normally, concerns
can be quickly resolved at that level.
If the matter has already been
reviewed with the sales, service,
or parts manager, contact the owner
of your dealership or the general
manager.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
366 Customer Information
G:View maintenance schedules,
alerts, and Vehicle Diagnostic
Information. Schedule service
appointments.
I: View and print dealer-recorded
service records and self-recorded
service records.
D: Select a preferred dealer and
view locations, maps, phone
numbers, and hours.
r: Track your vehicle’s warranty
information.
J: View active recalls by Vehicle
Identification Number (VIN). See
Vehicle Identification Number (VIN)
0 353.
H:View GM Card, SiriusXM
Satellite radio (if equipped), and
OnStar account information (if
equipped).
F: Chat with online help
representatives.
See www.my.chevrolet.com to
register your vehicle.
Chevrolet Owner Centre
(Canada)
www.chevroletowner.ca
Visit the Chevrolet Owner Centre:
. Chat live with online help
representatives.
. Locate owner resources such as
lease-end, financing, and
warranty information.
. Retrieve your favorite articles,
quizzes, tips, and multimedia
galleries organized into the
Featured Articles and Auto Care
Sections.
. Download owner ’s manuals.
. Find the
Chevrolet-recommended
maintenance services.
GM Mobility
Reimbursement Program
This program is available to
qualified applicants for cost
reimbursement of eligible
aftermarket adaptive equipment
required for the vehicle, such as
hand controls or a wheelchair/
scooter lift for the vehicle.
For more information on the limited
offer, visit www.gmmobility.com or
call the GM Mobility Assistance
Center at 1-800-323-9935. Text
Telephone (TTY) users, call
1-800-833-9935.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Customer Information 367
Roadside Assistance
Program
Call 1-888-899-1327. (Text
Telephone (TTY): 1-888-889-2438.)
Service is available 24 hours a day,
365 days a year.
Calling for Assistance
When calling Roadside Assistance,
have the following information
ready:
.Your name, home address, and
home telephone number.
. Telephone number of your
location.
. Location of the vehicle.
. Model, year, color, and license
plate number of the vehicle.
. Odometer reading, Vehicle
Identification Number (VIN), and
delivery date of the vehicle.
. Description of the problem.
Coverage
Services are provided for the
duration of the vehicle’s powertrain
warranty.
Anyone driving the vehicle is
covered.
Roadside Assistance is not a part of
the New Vehicle Limited Warranty.
General Motors North America and
Chevrolet reserve the right to make
any changes or discontinue the
Roadside Assistance program at
any time without notification.
General Motors North America and
Chevrolet reserve the right to limit
services or payment to an owner or
driver if they decide the claims are
made too often, or the same type of
claim is made many times.
Services Provided
.Emergency Tow from a Public
Road or Highway: Tow to the
nearest Chevrolet dealer for
warranty service, or if the vehicle
was in a crash and cannot be driven. Assistance is not given
when the vehicle is stuck in the
sand, mud, or snow.
Services Not Included in
Roadside Assistance
.
Impound towing caused by
violation of any laws.
. Legal fines.
. Mounting, dismounting,
or changing of snow tires,
chains, or other traction devices.
Service is not provided if a vehicle
is in an area that is not accessible
to the service vehicle or is not a
regularly traveled or maintained
public road, which includes ice and
winter roads. Off-road use is not
covered.
Scheduling Service
Appointments
When the vehicle requires warranty
service, contact your dealer and
request an appointment. By
scheduling a service appointment
and advising the service consultant