2020 CHEVROLET LOW CAB FORWARD fuel

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
338 Service and Maintenance
a while. If you notice diesel fumes or
fluid at any time, have the cause
found and corrected at once.
S: Underbody :Corrosive materials
used for ice removal, snow removal
and dust control can collect on the
underbody. If these materials are
not removed, accelerated corrosion
(rust) can occur on underbody parts
such as fuel lines, frame, floor pan
and exhaust system. At least every
spring, flush these materials from
the underbody with plain water.
Take care to clean well any areas
where mud and other debris can
collect. Sediment packed in closed
areas of the frame should be
loosened before being flushed.Checking Components that
Showed Abnormalities during
Previous Operation
Check the components that showed
abnormalities during the previous
operation. Have any abnormalities
repaired by your dealer before using
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
342 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 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
Technical Data 349
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 HD/XD/5500 HD/XD
Owner Manual (GMNA-Localizing-U.S.-13337621) - 2020 - crc - 12/5/18
352 Technical Data
Limited slip differential
lubricant additive4500HD/4500XD:
0.5 L (1.06 pt)*5
5500HD/5500XD:0.6 L (1.27 pt)*5
Fuel
Fuel tank capacity
*6113 L (30.0 gal)
125 L (33.0 gal)
Diesel Exhaust Fluid (DEF)
DEF tank capacity 16.0 L (4.23 gal) Steering
Steering wheel free play 10–50 mm (0.39–1.97 in)
Power steering fluid capacity 1.5 L (1.6 qt) Wheel
Wheel alignment
Toe-in –2 to 2 mm (–0.08 to 0.08 in)
Camber 0°15’
Caster LH 2°50’, RH 3°40’
King pin 12°
Wheel hub bearing grease capacity 0.11 kg (0.24 lb)
Wheel stud nut torque : Front and rear 500 Y(50 kgf m/362 lb ft)

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
354 Technical Data
Parking Brake
Lever effective stroke (Under pull force of approx. 147 N (15 kg/33 lb) 6–8 notches
Electrical System
Battery type [BCI size] (RC-CCA) x No. of units 31T (160–950) x 2
*7
Starter
12 V/3.0 kw
Alternator 12 V/140 amp
Tightening Torque
Oil pan drain plug 83.3Y(8.5 kgf m/61.0 lb ft)
Oil filter drain plug —
Oil filter —
Oil filter cartridge 63.7Y(6.5 kgf m/47.0 lb ft)
Remarks:
*1see Engine Oil 0235.
Remarks:*2see Engine Coolant 0243.
Remarks:*3see Automatic Transmission Fluid 0241.
Remarks:*4see Rear Axle (Gear Oil Viscosity Chart) 0261 or
Rear Axle (Oil Level Check) 0262.
Remarks:
*5only for vehicles equipped with optional limited slip differential.
Remarks:*6The fuel tank capacity is stated on a metal plate attached to the fuel tank body. Only fill the tank to
95 percent of its capacity; this allows room for the expansion of the fuel.
Remarks:
*7larger capacity batteries 31 (180-930) × 2 can also be used. However, do not mix batteries of different
types and from different makers.

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
Customer Information 363
Reporting Safety
Defects
Reporting Safety Defects
to the United States
Government
If you believe that your vehicle
has a defect which could cause
a crash or could cause injury or
death, you should immediately
inform the National Highway
Traffic Safety Administration
(NHTSA) in addition to notifying
General Motors.
If NHTSA receives similar
complaints, it may open an
investigation, and if it finds that
a safety defect exists in a group
of vehicles, it may order a recall
and remedy campaign.
However, NHTSA cannot
become involved in individual
problems between you, your
dealer, or General Motors.To contact NHTSA, you may call
the Vehicle Safety Hotline
toll-free at 1-888-327-4236 (TTY:
1-800-424-9153); go to
http://
www.safercar.gov; or write to:
Administrator, NHTSA
1200 New Jersey Avenue, S.E.
Washington, D.C. 20590
You can also obtain other
information about motor vehicle
safety from http://
www.safercar.gov
.
Reporting Safety Defects
to General Motors
In addition to notifying NHTSA in a
situation like this, notify General
Motors.
Call 1-800-862-4389, or write:
Chevrolet Motor Division
Chevrolet Customer Assistance
Center
P.O. Box 33170
Detroit, MI 48232-5170
Vehicle Data
Recording and
Privacy
The vehicle has a number of
computers that record information
about the vehicle’s performance and
how it is driven or used. For
example, the vehicle uses computer
modules to monitor and control
engine and transmission
performance, to monitor the
conditions for airbag deployment
and deploy them in a crash, and,
if equipped, to provide antilock
braking to help the driver control the
vehicle. These modules may store
data to help the dealer technician
service the vehicle or to help GM
improve safety or features. Some
modules may also store data about
how the vehicle is operated, such as
rate of fuel consumption or average
speed. These modules may retain
personal preferences, such as radio
presets, seat positions, and
temperature settings.

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
Index 367
D
Damage Repair, Collision . . . . . . . 359
Danger, Warning, and Caution . . . . 3
Daytime Running Lamps (DRL)Indicator Light . . . . . . . . . . . . . . . . . . 69
Devices Auxiliary . . . . . . . . . . . . . . . . . . . . . . 107
Diesel Engine Engine Alarm andAutomatic Shutdown . . . . . . . . 164
Diesel Exhaust Fluid . . . . . . . . . . . . 180
Diesel Exhaust Fluid (DEF) Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 60
Diesel Exhaust Fluid (DEF)
Warning Light . . . . . . . . . . . . . . . . . . 68
Diesel Particulate Filter . . . . . . . . . 171
Distracted Driving . . . . . . . . . . . . . . . 130
Dome Lamps . . . . . . . . . . . . . . . . . . . . 84
Door Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power Locks . . . . . . . . . . . . . . . . . . . . 21
Drive Belt Routing, Engine . . . . . . 355
Driver Behavior . . . . . . . . . . . . . . . . . 129
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . 70
Driving Better Fuel Economy . . . . . . . . . 129
Emergencies . . . . . . . . . . . . 145, 155 Driving (cont'd)
Hill and Mountain Roads . . . . . . 141
If the Vehicle is Stuck . . . . . . . . . 144
Wet Roads . . . . . . . . . . . . . . . . . . . 140
Winter . . . . . . . . . . . . . . . . . . . . . . . . 142
E
Electrical Equipment,
Add-On . . . . . . . . . . . . . . . . . . . . . . . 227
Electrical System
Overload . . . . . . . . . . . . . . . . . . . . . 277
Emergencies . . . . . . . . . . . . . . 145, 155
Engine Air Cleaner/Filter . . . . . . . . . . . . . 243
Alarm and Automatic
Shutdown . . . . . . . . . . . . . . . . . . . 164
Check Light (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . 61
Checks Before Operating . . . . . 166
Compartment Overview . . . . . . . 234
Coolant . . . . . . . . . . . . . . . . . . . . . . . 243
Coolant Temperature Gauge . . . . 60
Cover . . . . . . . . . . . . . . . . . . . . . . . . . 235
Drive Belt Routing . . . . . . . . . . . . 355
Exhaust . . . . . . . . . . . . . . . . . . . . . . 168
Heater . . . . . . . . . . . . . . . . . . . . . . . . 163
High Idle System . . . . . . . . . . . . . 165
Oil Pressure Light . . . . . . . . . . . . . . 67 Engine (cont'd)
Overheating . . . . . . . . . . . . . . . . . . 249
Reduced Power Light . . . . . . . . . . . 69
Running While Parked . . . . . . . . 170
Shutdown Warning Light . . . . . . . . 68
Engine Oil Level Indicator Light . . . . . . . . . . . . 67
Engines Diesel Fuel . . . . . . . . . . . . . . . . . . . 218
Exhaust Brake . . . . . . . . . . . . . . . . . . 213
Exhaust Brake Light . . . . . . . . . . . . . 65
Exhaust Fluid Diesel . . . . . . . . . . . . . . . . . . . . . . . . 180
Extender, Seat Belt . . . . . . . . . . . . . . 37
Exterior Lamp Controls . . . . . . . . . . 80
F
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Filter, Engine Air Cleaner . . . . . . . . . . . 243
Fixed Mast Antenna . . . . . . . . . . . . . 90
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . 81
Flashers, Hazard Warning . . . . . . . 82
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 300
Fluid Automatic Transmission . . . . . . 241
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 258

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
368 Index
Fluid (cont'd)Power Steering . . . . . . . . . . . . . . . 252
Washer . . . . . . . . . . . . . . . . . . . . . . . 252
Frequency Statement
Radio . . . . . . . . . . . . . . . . . . . . . . . . . 362
Front Seat Position Seats Adjustment . . . . . . . . . . . . . . . . . . . . . 26
Fuel Biodiesel . . . . . . . . . . . . . . . . . . . . . 219
Cold Weather Operation . . . . . . 221
Diesel Engines . . . . . . . . . . . . . . . 218
Economy, Driving for Better . . . 129
Filling the Tank . . . . . . . . . . . . . . . 225
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Running out of Fuel . . . . . . . . . . . 224
Water in Fuel . . . . . . . . . . . . . . . . . 221
Fuel for Diesel Engines . . . . . . . . . 218
G
Gauges
Diesel Exhaust Fluid (DEF) . . . . . 60
Engine Coolant Temperature . . . 60
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Odometer . . . . . . . . . . . . . . . . . . . . . . . 58
Speedometer . . . . . . . . . . . . . . . . . . . 58
Tachometer . . . . . . . . . . . . . . . . . . . . . 59
Trip Odometer . . . . . . . . . . . . . . . . . . 58 Gauges (cont'd)
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . . 56
General Information
Vehicle Care . . . . . . . . . . . . . . . . . . 230
Getting In and Out of the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 17
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 43
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 358
H
Hazard Warning Flashers . . . . . . . . 82
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 267
Bulb Replacement . . . . . . . 267, 270
Daytime Running Lamps(DRL) Indicator Light . . . . . . . . . . 69
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 81
High-Beam On Light . . . . . . . . . . . . 69
High/Low Beam Changer . . . . . . . 81
Heated Mirrors . . . . . . . . . . . . . . . . . . . 22
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 163
Heating . . . . . . . . . . . . . . . . . . . . . . . . . 121
High Idle System . . . . . . . . . . . . . . . 165
High-Beam On Light . . . . . . . . . . . . . 69
Hill and Mountain Roads . . . . . . . . 141 Hooks
Shopping Bag . . . . . . . . . . . . . . . . . . 45
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
I
Idle Shutdown . . . . . . . . . . . . . . . . . . 164
Idle Shutdown Light . . . . . . . . . . . . . 68
Ignition Positions . . . . . . . . . . . . . . . 157
Information Publication Ordering . . . . . . . . . . 362
Information on Loading the
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 46
Instrument Cluster . . . . . . . . . . . . . . . 57
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . 43
Instrument Panel
Overview . . . . . . . . . . . . . . . . . 8, 10, 11
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . . . 301
K
Keyless EntryRemote (RKE) System . . . . . . . . . 14
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13