engine CHEVROLET LOW CAB FORWARD 2017 Owner's Manual

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
388 Technical Data
Engine Number (6.0L
V8 Engine)
Left-side rear
Right-side rear
The engine number is located on
the left-side rear part of the engine
block and the right-side front part of
the oil pan.
Engine Number (5.2L L4
Diesel)
The engine number is located on
the left-side rear part of the engine
block and the right-side front part of
the oil pan.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Technical Data 389
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. Water-cooled, overhead
valve, engine Water-cooled, overhead
camshaft, direct injection engine with a charge air cooled turbocharger.
Manufacturer Isuzu GMPT Isuzu
Model 3.0L Diesel Engine 6.0L Gasoline Engine 5.2L Diesel Engine
Engine type Inline 4, Four Cycle V8, Four Cycle Inline 4, Four Cycle
Induction Turbocharged W/Charge
Air Cooler Mass Air Turbocharged W/Charge
Air Cooler
Bore 95.4 mm 101.6 mm 115 mm
Stroke 104.9 mm 92 mm 125 mm
Displacement 2.999 L (183.0 CID) 6.000 L (364 CID) 5.193 L (317 CID)
Full load RPM 2,800 r/min 4,300 r/min 2,400 r/min
Compression ratio 17.5 to 1 9.67 to 1 16.5 to 1
Firing order 1-3-4-2 1-8-7-2-6-5-4-3 1-3-4-2

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
390 Technical Data
Fuel injection timing
(static) degree0° Variable 0°
Valve clearance (Between
cam and roller) Both intake and exhaust
valves:
0.15 mm (0.006 in) in cold engine —
Both intake and exhaust
valves:
0.6 mm (0.024 in) in cold engine
Idling speed 576 - 625 r/min 550 r/min 500 - 600 r/min
Fan belt tension New belt: 4 - 6 mm (0.16 -
0.24 in)/212 - 236 Hz
When used: 6 - 8 mm (0.24
- 0.31 in)/181 - 195 Hz —
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 Replaceable element type Replaceable element type Catridge
Engine oil capacity When changing oil and
filter:
8.2 L (8.7 qt)
*1
When changing oil and filter:
5.7 L (6.0 qt)
*1
When changing oil only: 9.5 L (10.0 qt)*1
When changing oil and
filter:
11.0 L (11.6 qt)
*1
Engine coolant capacity 12.6 L (13.3 qt)*215.0 L (15.9 qt)*219.6 L (20.7 qt)*2
Preheating system Glow plugs—Glow plugs

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Technical Data 391
Transmission Specifications
Model A460Six-speed automatic
transmission (overdrive
gear for 5th and 6th),
lock-up clutch for 2nd
to 6th. 6L90
Six-speed automatic
transmission (overdrive
gear for 5th and 6th),
lock-up clutch for 2nd
to 6thA465 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 4.027 to 1 3.742 to 1 2nd 2.003 to 1 2.364 to 1 2.003 to 13rd 1.343 to 1 1.532 to 1 1.343 to 1
4th 1.000 to 1 1.152 to 1 1.000 to 1
5th 0.773 to 1 0.852 to 1 0.773 to 1
6th 0.634 to 1 0.667 to 1 0.634 to 1
Reverse 3.539 to 1 3.064 to 1 3.539 to 1
Transmission oil capacity 13.4 L (28.3 pt) 12.17 L (25.72 pt) 13.1 L (27.7 pt)
Weights
Model 3.0 Diesel Engine 6.0L Gasoline Engine 5.2 Diesel Engine
Axle weight rating : Front 3500HD: 2431 kg (5,360 lb) 3500: 2204 kg (4,860 lb) 4500: 3007 kg (6,630 lb)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 Service
Model 3.0 Diesel Engine 6.0L Gasoline Engine 5.2 Diesel Engine

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
392 Technical Data
Engine oil capacityWhen changing oil only:
7.5 L (7.9 qt)*1
When changing oil andfilter: 8.2 L (8.7 qt)*1
When changing oil andfilter: 5.7 L (6.0 qt)*1When changing oil only: 9.5 L (10.0 qt)*1
When changing oil andfilter: 11.0 L (11.6 qt)*1
Engine Cooling System Service
Model 3.0 Diesel Engine 6.0L Gasoline Engine 5.2 Diesel Engine
Capacity 12.6 L (13.3 qt) 15.0 L (15.9 qt) 19.6 L (20.7 qt)
Engine oil Thermostat:
Starts to open 85 °C (185 °F) 85.5-87.5 °C
(185.9-189.5 °F)82-85 °C (180-185 °F)
Radiator pressure 108 kPa (16 psi) 103 kPa (15 psi) 108 kPa (16 psi)
Transmission Service
Model A460 6L90 A465
Transmission oil capacity 13.4 L (28.3 qt)
*312.7 L (25.7 qt)*313.1 L (27.7 qt)*3
Rear Axle Service
Model 3.0 Diesel Engine 6.0L Gasoline Engine 5.2 Diesel Engine
Differential gear oil
capacity 9.0 L (19.0 qt)
*49.7 L (20.5 qt)*44500HD/4500XD:
9.0 L (19.0 qt)*4
5500HD/5500XD:
10.0 L (21.1 qt)*4
Limited slip differential
lubricant additive 0.5 L (1.06 qt)*50.6 L (1.27 qt)*54500HD/4500XD:
0.5 L (1.06 qt)*5
5500HD/5500XD:
0.6 L (1.27 qt)*5

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
394 Technical Data
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 Refer to Brakes0275.
Clearance between the brake pedal and the brake pedal
bracket (applied to the brake pedal)
Parking Brake
Lever effective stroke (Under pull force of approx. 147 N (15 kg/33 lb) 6 - 8 notches
Electrical System
Model 3.0 Diesel Engine 6.0L Gasoline Engine 5.2 Diesel Engine
Battery type [BCI size] (RC-CCA) x No. of units 31T (160 - 750) x 2 31 (180 - 750) x 1 31 (160 - 750) x 2
*7
Starter
12 V - 2.0 kw12 V - 1.7 kw12 V - 3.0 kw
Alternator 12 V - 140 amp12 V - 145 amp12 V - 140 amp
Tightening Torque
Model 3.0 Diesel Engine 6.0L Gasoline Engine 5.2 Diesel Engine

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Technical Data 395
Oil pan drain plug83.3Y(8.5 kgf m/
61.0 lb ft) 25.0
Y(2.5 kgf m/
18.0 lb ft) 83.3
Y(8.5 kgf m/
61.0 lb ft)
Oil filter drain plug 25.0Y(2.5 kgf m/
18.0 lb ft) —
—
Oil filter —30.0Y(3.1 kgf m/
22.0 lb ft) —
Oil filter cartridge ——63.7Y(6.5 kgf m/
47.0 lb ft)
Remarks:
*1see Engine Oil (Gasoline) 0257 orEngine Oil (Diesel) 0251.
Remarks:*2see Engine Coolant 0263.
Remarks:*3see Automatic Transmission Fluid 0260.
Remarks:*4see Rear Axle (Gear Oil Viscosity Chart) 0283 orRear Axle (Oil Level Check) 0283.
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 Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
396 Technical Data
Engine Drive Belt Routing
Fan Belt and Air Conditioning
Compressor Belt
See theMaintenance Schedule
0 345.
3.0L L4 Engine (IZ3)
No. Name
1 Fan Pulley
2 Tension pulley
3 A/C compressor
4 A/C belt
5 Crank pulley
6 Idler No.
Name
7 Alternator
8 Fan belt
If your air conditioning system is
functioning properly, it is not
necessary to remove and replace
the refrigerant or compressor oil.
6.0L V8 Engine (L96)
No. Name
1 Fan belt idler pulley
2 Alternator
3 Vacuum pulley
4 Power steering pump pulley No.
Name
5 Cooling fan pulley
6 Crank pulley
7 A/C belt
8 A/C compressor
9 Fan belt
10 Fan belt tensioner
5.2L L4 Engine (I1B)
No. Name
1 Fan belt
2 Fan pulley
3 A/C belt

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Technical Data 397
No.Name
4 A/C compressor
5 Tension pulley
6 Crank pulley
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 Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
Customer Information 403
For emergency towing see
Roadside Assistance Program
0400.
Gather the following information:
. Driver name, address, and
telephone number.
. Driver license number.
. Owner name, address, and
telephone number.
. Vehicle license plate number.
. Vehicle make, model, and
model year.
. Vehicle Identification
Number (VIN).
. Insurance company and policy
number.
. General description of the
damage to the other vehicle.
Choose a reputable repair facility
that uses quality replacement parts.
See “Collision Parts” earlier in this
section.Managing the Vehicle Damage
Repair Process
In the event that the vehicle requires
damage repairs, GM recommends
that you take an active role in its
repair. If you have a pre-determined
repair facility of choice, take the
vehicle there, or have it towed there.
Specify to the facility that any
required replacement collision parts
be original equipment parts, either
new Genuine GM parts or recycled
original GM parts. Remember,
recycled parts will not be covered by
the GM vehicle warranty.
Insurance pays the bill for the repair,
but you must live with the repair.
Depending on your policy limits,
your insurance company may
initially value the repair using
aftermarket parts. Discuss this with
the repair professional, and insist on
Genuine GM parts. Remember,
if the vehicle is leased, you may be
obligated to have the vehicle
repaired with Genuine GM parts,
even if your insurance coverage
does not pay the full cost. If another party's insurance
company is paying for the repairs,
you are not obligated to accept a
repair valuation based on that
insurance company's collision policy
repair limits, as you have no
contractual limits with that company.
In such cases, you can have control
of the repair and parts choices as
long as the cost stays within
reasonable limits.
Service Publications
Ordering Information
Service Manuals
Service Manuals have the diagnosis
and repair information on the
engines, transmission, axle,
suspension, brakes, electrical,
steering, body, etc.
Owner Information
Owner publications are written
specifically for owners and intended
to provide basic operational
information about the vehicle. The
Owner Manual includes the
Maintenance Schedule for all
models.