2019 CHEVROLET LOW CAB FORWARD fuel

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Service and Maintenance 347
one side, unusual sounds when
braking, increased brake pedal
travel or harder pedal. The front and
rear brakes are attached to an auto
adjuster mechanism. If there are no
defects, as the pedal travel is
properly maintained, adjustments
are not necessary. Check regularly
that the brake fluid reservoir
(left-hand side of the instrument
panel) or HBB reservoir (5500HD,
5500XD models: left side behind the
cab) is properly filled and check for
fluid leaks. Any of these conditions
could indicate the need for brake
system inspection and/or service.
G: Exhaust System :Be alert for
any changes in the sound of the
exhaust system or any smell of
fumes. These are signs the system
may be leaking. Have it checked
and/or repaired at once. (Refer to
"Engine Exhaust Emissions Caution
(Carbon Monoxide)" under Engine
Exhaust 0177).
H: Windshield Wipers and
Washers : Check operation and
condition of the wiper blades. Check
the flow of the washer spray. I: Defroster :
Turn the outlet
selector knob to "Defroster" and the
fan speed control knob to the fully
clockwise position. Then check the
airflow from the ducts at the inside
base of the windshield.
J: Rearview Mirrors and Sun
Visors : Check that friction joints
hold mirrors and sun visors in place.
K: Horn : Sound the horn, now and
then, to be sure it works.
L: Lap-Shoulder Belts : Check the
seat belt system (including webbing,
buckles, latch plates and anchors)
for proper operation, and for
damage.
M: Seat Adjusters : When
adjusting the driver's manual seat,
be sure the seat adjusters latch by
pushing the seat forward and
backward. Do not attempt to adjust
the seat when the vehicle is in
motion.
N: Lamps : Check panel lighting,
warning lamps, indicator lamps and
interior lamps. On the outside,
check: license plate lamps, side
marker lamps, reflectors on outside mirrors, headlamps, parking lamps,
identification and clearance lamps,
taillights, brake lamps, turn signals,
cornering lamps, backup lamps and
hazard warning flashers. Have
headlamp aim checked immediately
if beams seem improperly aimed.
O: Glass, Mirrors, Lights and/or
Reflectors Condition :
Look for
broken, scratched, dirty or damaged
glass, mirrors, lamps or reflectors
that could reduce the view or
visibility, or cause injury. Replace,
clean or repair promptly.
P: Door Latches : Check that doors
close, latch and lock tightly. Check
for broken, damaged or missing
parts that might prevent tight
latching.
Q :Tilt Cab (Driving Position) : Be
sure the tilt lever is down and
locked.
R: Fluid Leaks : Check for fuel,
water, oil or other fluid leaks by
looking at the surface beneath the
vehicle after it has been parked for

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
348 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 4500/5500 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
360 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 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
362 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 (160–750) 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 0245.
Remarks:*2see Engine Coolant 0253.
Remarks:*3see Automatic Transmission Fluid 0251.
Remarks:*4see Rear Axle (Gear Oil Viscosity Chart) 0271 orRear Axle (Oil Level Check) 0272.
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 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
372 Customer Information
Vehicle Data
Recording and
Privacy
Your vehicle, like other modern
motor vehicles, has a number of
sophisticated computer systems that
monitor and control several aspects
of the vehicle performance. Your
vehicle uses onboard vehicle
computers to monitor emission
control components to optimize fuel
economy and to provide anti-lock
braking and to help the driver
control the vehicle in difficult driving
situations. These computers and
your vehicle's Data Recording
Module (DRM) also store
information about the performance
and status of certain systems in
your vehicle including the engine,
throttle, and braking systems.
General Motors and its affiliates, as
well as service and repair facilities
may access or download and share
this information via a direct
connection to your vehicle in order
to diagnose and repair problems
and properly service the vehicle.GM and its affiliates may also
download and retrieve stored
information from your vehicle for
motor vehicle research and
development, safety and vehicle
improvement purposes.

Chevrolet Low Cab Forward 5.2L Diesel Engine 4500/5500 Series (GMNA-
Localizing-U.S.-12407814) - 2019 - crc - 12/13/17
Index 375
DevicesAuxiliary . . . . . . . . . . . . . . . . . . . . . . .117
Diesel Engine Engine Alarm andAutomatic Shutdown . . . . . . . . 173
Diesel Exhaust Fluid . . . . . . . . 24, 189
Diesel Exhaust Fluid (DEF) Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 72
Diesel Exhaust Fluid (DEF) Warning Light . . . . . . . . . . . . . . . . . . 80
Diesel Particulate Filter . . . . . . . . . 180
Distracted Driving . . . . . . . . . . . . . . . 139
Dome Lamps . . . . . . . . . . . . . . . . . . . . 96
Door
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Power Locks . . . . . . . . . . . . . . . . . . . . 33
Drive Belt Routing, Engine . . . . . . 363
Driver Behavior . . . . . . . . . . . . . . . . . 139
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . . 82
Driving
Emergencies . . . . . . . . . . . . 154, 164
For Better Fuel Economy . . . . . . . 24
Hill and Mountain Roads . . . . . . 150
If the Vehicle is Stuck . . . . . . . . . 153
Wet Roads . . . . . . . . . . . . . . . . . . . 149
Winter . . . . . . . . . . . . . . . . . . . . . . . . 151E
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 236
Electrical System Overload . . . . . . . . . . . . . . . . . . . . . 287
Emergencies . . . . . . . . . . . . . . 154, 164
Engine Air Cleaner/Filter . . . . . . . . . . . . . 253
Alarm and AutomaticShutdown . . . . . . . . . . . . . . . . . . . 173
Check Light (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . 73
Checks Before Operating . . . . . 175
Compartment Overview . . . . . . . 244
Coolant . . . . . . . . . . . . . . . . . . . . . . . 253
Coolant Temperature Gauge . . . . 72
Cover . . . . . . . . . . . . . . . . . . . . . . . . . 245
Drive Belt Routing . . . . . . . . . . . . 363
Exhaust . . . . . . . . . . . . . . . . . . . . . . 177
Heater . . . . . . . . . . . . . . . . . . . . . . . . 172
High Idle System . . . . . . . . . . . . . 174
Oil Pressure Light . . . . . . . . . . . . . . 79
Overheating . . . . . . . . . . . . . . . . . . 259
Reduced Power Light . . . . . . . . . . . 81
Running While Parked . . . . . . . . 179
Shutdown Warning Light . . . . . . . . 80
Engine Oil Level Indicator Light . . . . . . . . . . . . 79 Engines
Diesel Fuel . . . . . . . . . . . . . . . . . . . 227
Exhaust Brake . . . . . . . . . . . . . . . . . . 222
Exhaust Brake Light . . . . . . . . . . . . . 77
Exhaust Fluid Diesel . . . . . . . . . . . . . . . . . . . . . . . . 189
Extender, Seat Belt . . . . . . . . . . . . . . 49
Exterior Lamp Controls . . . . . . . . . . 92
F
Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180 Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Filter, Engine Air Cleaner . . . . . . . . . . . 253
Fixed Mast Antenna . . . . . . . . . . . . 102
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . 93
Flashers, Hazard Warning . . . . . . . 94
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . 310
Fluid Automatic Transmission . . . . . . 251
Brakes . . . . . . . . . . . . . . . . . . . . . . . . 268
Diesel Exhaust . . . . . . . . . . . . . . . . . 24
Power Steering . . . . . . . . . . . . . . . 262
Washer . . . . . . . . . . . . . . . . . . . . . . . 262
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . . . 370
Front Seat Position Seats Adjustment . . . . . . . . . . . . . . . . . . . . . 38