2020 CHEVROLET LOW CAB FORWARD 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
344 Technical Data
The "VIN, Weight Rating, and
Greenhouse Gas (GHG) Emissions
Plate" shows the manufacturer's
gross vehicle weight rating (GVWR),
the front and rear gross axle weight
ratings (GAWRs), as well as the VIN
and emissions information for your
vehicle.
This plate is located on the left side
rear pillar panel below the striker
(single cab) or on the left center
pillar panel beside the shoulder seat
belt anchor (crew cab).The VIN is a legal identifier of your
vehicle. It not only appears on the
VIN, Weight Rating, and
Greenhouse Gas (GHG) Emissions
plate; but also on the vehicle title
and registration. The VIN
specifically identifies a vehicle
by code.
See
“Overloading” underInformation
on Loading the Vehicle 046.
The VIN contains multiple pieces of
information including the vehicle
and engine model codes as shown
below.

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 345
J A L C 4 W 1 6 * L 7 K 0 0 0 0 11 2 3 4 5 6 7 8 9 10 11
Section Description
1 World Manufacturer Identifier (WMI) JAL: ISUZU
2 GVWR and Brake System C: 14,001-16,000 lbs. hydraulic brake system
E: 16,001-19,500 lbs. hydraulic brake system
3 Series Code 4: 4500HD/4500XD
5: 5500HD/5500XD
4 Cab Type Code W: Steel tilt single cab, 71 inch bumper to back of cab (BBC)
J: Non-tilt crew cab, 110 inch bumper to back of cab (BBC)
5 Chassis Type Code 1: 4 x 2
6 Engine Code 6: 4HK1
7 Check Digit
8 Model Year Code L: 2020

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
346 Technical Data
SectionDescription
9 Plant Code 7: Fujisawa
10 Model Code 0: 4500HD
3: 5500XD
9: 5500HD
K: 4500XD
11 Sequence Numbers
Interpretation of the VIN may differ
depending on the vehicle. For
further details, please ask your
dealer.
The engine number is stamped on
the right side front part of the engine
block.

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 347
Option Codes
The ID plate at the lower part of the
righthand door striker indicates
option codes. These codes are
three-digit, alphanumeric codes,
each assigned to a particular
component of the vehicle.You will be able to use these codes
to identify the model or type of
engine, transmission, rear axle or
other components when your
vehicle needs inspection and other
services.

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
348 Technical Data
OptionCodes Component
RJS 4HK1
Y6Q Transmission: Automatic transmission A465ID model 6CP Rear Axle: Heavy-duty 320mm G73 Rear Axle: Heavy-duty 292mm
7QQ Other Components: Hydraulic brake booster (HBB)
There are more option codes than
those indicated above. Depending
on the vehicle, an option code may
not be shown. For detailed
specifications of your vehicle, see
your dealer.

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
350 Technical Data
Valve clearanceBoth intake and exhaust valves:
0.6 mm (0.024 in) in cold engine
Idling speed 550–600 r/min
Fan belt tension New belt: 5–7 mm (0.20–0.28 in)/184–206 Hz
When used: 8–9 mm (0.31–0.35 in)/158–170 Hz
Oil filter Cartridge (spin on) type
Engine oil capacity When changing oil and filter:
11.0 L (11.6 qt)
*1
Engine coolant capacity 19.6 L (20.7 qt)*2
Preheating system Glow plugs
Transmission Specifications
A465ID Model –Six-speed automatic transmission (overdrive gear for 5th and 6th), lock-up clutch for 2nd to 6th
Gear Ratio 1st 3.742 to 1
2nd 2.003 to 1 3rd 1.343 to 14th 1.000 to 1
5th 0.773 to 1
6th 0.634 to 1
Reverse 3.539 to 1

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 351
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 13.7 L (28.9 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