maintenance CHEVROLET LOW CAB FORWARD 2017 Service Manual

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
10716700) - 2017 - crc - 12/6/16
340 Vehicle Care
from industrial chimneys and other
foreign matter may damage vehicle
finishes if left on painted surfaces.
Prompt washing may not completely
remove all of these deposits. Other
cleaners may be needed. When
using chemical cleaners, be sure
they are safe for use on painted
surfaces.
Finish Damage
Any stone chips, fractures or deep
scratches in the finish should be
repaired promptly. Bare metal will
corrode quickly and may develop
into major repair expense. Minor
chips and scratches can be repaired
with touch up materials available
from your authorized dealer or other
service outlets. Larger areas of
finish damage can be corrected in
your dealer's body and paint shop.
Underbody Maintenance
Corrosive materials used for ice and
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 asfuel lines, frames, floor pan and
exhaust system even though they
have been provided with corrosion
protection.
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.
If desired, your authorized dealer
can do this for you.
Interior Care
General
Remove dust and dirt from the
interior of the cab using an
automotive cleaner or vacuum
cleaner, and gently wipe surfaces
clean using a cloth wet with warm or
cold water.
{Warning
Water should never be sprayed
directly into the interior of the cab
when cleaning. Failure to observe
this precaution can lead to vehicle
malfunction and possibly to fire if
water should enter the audio
system or other electrical
components located underneath
the floor carpet.
Petroleum ether, gasoline and
other organic solvents should not
be used to clean safety belts. In
addition, safety belt webbing
should be neither bleached nor
redyed. Failure to observe these
precautions can lead to the
performance or strength of the
safety belts being impaired. In the
case of a collision, therefore, the
safety belts could be insufficiently
effective, and serious
life-threatening injuries could
result. When cleaning, use warm
water in which a small amount of
(Continued)

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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Service and Maintenance 345
Service and
Maintenance
Maintenance Schedule
Maintenance Schedule . . . . . . . 345
Owner Checks and Services
Owner Checks andServices . . . . . . . . . . . . . . . . . . . . 367
Additional Maintenance
and Care
Additional Maintenanceand Care . . . . . . . . . . . . . . . . . . . . 375
Recommended Fluids,
Lubricants, and Parts
Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 378
Maintenance Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . 380
Maintenance
Schedule
Make sure the vehicle is inspected
at regular intervals. Inspections and
maintenance enable you to use the
vehicle with peace of mind. They
also extend the vehicle's
service life.
For safe and economical driving, we
recommend that you have your
vehicle inspected and serviced
regularly according to the schedule
indicated in this chapter.
To drive your vehicle safely and at
minimum cost, it is essential to have
your vehicle regularly inspected and
serviced at your dealer as per the
specified maintenance schedule.
Contact your dealer for inspection
that requires disassembly and/or
special equipment.
The Maintenance Schedule in this
manual and a Warranty Information
Booklet are supplied with your
vehicle. Read all publications for a
full understanding of your vehicle's
maintenance needs. The quality of maintenance your
new vehicle receives is as important
as the regularity with which it is
serviced. Authorized dealers provide
nationwide quality in customer
service. The program includes the
training of dealer technicians
throughout the country and is
supported with a continuous
follow-up of publications and other
service information. The use of
genuine parts and accessories,
which have the same high quality
standards as original equipment
parts, and the use of factory
approved tools developed and
tested for use by the authorized
dealer also contribute to the high
quality of service.
If you have any questions on how to
keep your truck or chassis in good
condition, see your authorized
dealer, the place many truck owners
choose to have their maintenance
work done. Your authorized dealer
can be relied upon to use proper
parts and practices.
Some of these services can be
complex, so unless you are
technically qualified and have the

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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346 Service and Maintenance
necessary equipment, you should
let your authorized dealer's service
department or another qualified
service center do these jobs.
The schedule includes general
maintenance which you or a
qualified technician should perform
periodically.
Explanation of Vehicle
Maintenance and Log
The following is a brief explanation
of normal vehicle use.
NORMAL VEHICLE USE—The
maintenance instructions contained
in this section are based on the
assumption that your vehicle will be
used as designed:
.To carry passengers and cargo
with the limitations indicated on
the vehicle VIN and GVW plate.
. On reasonable road surfaces
within legal operating limits.
. On a daily basis, as a general
rule, for at least several miles/
kilometers. Unusual operating conditions, such
as driving in dusty areas (sweeper,
agricultural or off-road vehicles),
extended idling (refrigeration
vehicles), or vehicles operated for
frequent short trips, will require
more frequent vehicle maintenance.
The log groups items according to
mile/kilometer service intervals. Use
the item codes (letter and number)
to find the description of the
maintenance and the time intervals.
Follow whichever interval comes
first, time or miles/kilometers.
After the maintenance services are
performed, insert the month, day
and mileage/ kilometers in the area
provided next to the serviced item.
The services shown up to
176 000 km (110,000 miles) are to
be repeated after the initial
176 000 km (110,000 miles) at the
same intervals.
Severe Driving Conditions
A vehicle operated under severe
conditions (see list below) requires
more frequent maintenance. .
Frequent short trips of less than
6 kilometers (4 miles) in
moderate temperatures
. Frequent short trips of less than
16 kilometers (10 miles) in sub-
freezing temperatures
. Frequent and extended low-
speed engine operation (door-
to- door deliveries, stop- and- go
traffic, etc.)
. Driving on unpaved roads with
heavy dust
. Towing a trailer
Preventive Maintenance
As any mechanical device operates,
a certain amount of wear occurs.
The amount of wear depends on
certain variables –type and method
of operation and the schedule of
maintenance. These variables may
be emphasized as critical to
malfunction but each is dependent
upon the other. For example, if a
vehicle is repeatedly overloaded,
driven at excessive speed or
improperly shifted, no schedule of
maintenance can prevent
malfunction. Also, if a preventive

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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Service and Maintenance 347
maintenance schedule is not
followed, or is improperly carried
out, no amount of correct vehicle
operation will prevent malfunction.
If vehicle application, operation and
preventive maintenance schedules
and procedures are followed and
properly carried out, the life of the
vehicle will be greatly extended.
For example, regular attention to the
engine oil is essential. The oil level
must be periodically checked and oil
added whenever needed. Also, the
oil should be changed at the
intervals specified with the proper
quality and viscosity of oil. If your
engine should run excessively low
on oil or if the oil has lost its
lubricating qualities because of old
age, serious engine damage could
occur.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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348 Service and Maintenance
Maintenance Schedule Table (Gasoline Vehicles)
Letters Used to Indicate Maintenance Service Types
I :Inspect then clean, repair or replace as necessary
R : Replace
T : Tighten to the specified torque
L : Lubricate
No. Service Interval
12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
Service
intervals
months or
kilometers
(miles)
whichever
occurs
first (1)
1 Engine oil (2) (4) See Explanation of Complete Vehicle Maintenance Schedule or every 12 months
2 Engine oil filter (2) (4) See Explanation of Complete Vehicle Maintenance Schedule or every 12 months
3 Cooling System Service - - - I - - - I - - - I - - - I or every 24 months
4 Engine Coolant (2) Every 80 000 km (50,000 mi): R
5 Air Cleaner Filter (2) Every 48 000 km (30,000 mi): R
6 PCV System (2) - - - - - - - - I - - - - - - -
7 Spark Plugs (2) Every 160 000 km (100,000 mi): R
8 Spark Plug Wires (2) Every 160,000 km (100,000 mi): R
9 Fuel Tank, Cap, and Lines (2) (6) - - - - - - - - I - - - - - - -
10 Engine Accessory Drive Belt(s) (2) Every 60 000 km (37,500 mi): I
Every 160 000 km (100,000 mi): R

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Service and Maintenance 349
No. Service Interval
12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
Service
intervals
months or
kilometers
(miles)
whichever
occurs
first (1)
11 Evaporative Control System (2) (6) - - - - - - - - I - - - - - - -
12 Shields and Underhood Insulation (5) - I - I - I - I - I - I - I - I
13 Air Intake System (5) - - - I - - - I - - - I - - - I
14 Thermostatically Controlled Engine
Cooling Fan (5) - I - I - I - I - I - I - I - I or every 12 months
15 Automatic Transmission Fluid I I I I I I R I I I I I I R I I
16 Rotate Tires Every 12 000 km (7,500 mi)
17 Brake Lining and Pad for Wear I I I I I I I I I I I I I I I I
18 Brake drum and rotor for wear and
damage
- - - I - - - I - - - I - - - I or every 12 months
19 Brake Electric Vacuum Pump (4500
Series)
I I I I I I I I I I I I I I I I or every 12 months
20 Brake Fluid I I I R I I I R I I I R I I I R or every 24 months
21 Brake Line and Hoses - - - I - - - I - - - I - - - I or every 12 months
22 Hydraulic Unit Every 10 Years: R
23 Differential Gear Oil I I I R I I I R I I I R I I I R or every 24 months
24 Power Steering Fluid - - - - R - - - - R - - - - R - or every 24 months
25 Steering Wheel Free Play (3) Every 10 400 km (6,500 mi): I
26 Steering Gear Box Torque - - - T - - - T - - - T - - - T or every 12 months

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
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350 Service and Maintenance
No. Service Interval
12 000 km/7,500 mi
24 000 km/15,000 mi
36 000 km/22,500 mi
48 000 km/30,000 mi
60 000 km/37,500 mi
72 000 km/45,000 mi
84 000 km/52,500 mi
96 000 km/60,000 mi
108 000 km/67,500 mi
120 000 km/75,000 mi
132 000 km/82,500 mi
144 000 km/90,000 mi
156 000 km/97,500 mi
168 000 km/105,000 mi
180 000 km/112,500 mi
192 000 km/120,000 mi
Service
intervals
months or
kilometers
(miles)
whichever
occurs
first (1)
27 Driveshaft Flange Torque I T - T - T - T - T - T - T - T or every 12 months
28 Leaf spring U-bolt torque (3) T - T - T - T - T - T - T - T -
29 Wheel Nut Torque (3) T T T T T T T T T T T T T T T T
30 King Pins L L L L L L L L L L L L L L L L or every 12 months
31 Driveshaft Lubrication - L - L - L - L - L - L - L - L or every 12 months
32 Wheel Hub Bearing Grease (Front) - - - R - - - R - - - R - - - R or every 24 months
33 Accessory Drive Belt Every 160 000 km (100,000 mi): Ror every 12 months
34 Air Conditioner Blower Filter Cleaned once a month

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Service and Maintenance 351
Remarks
(1)In case this column is blank,
follow kilometers (miles).
(2) An Emission Control Service.
(3) Initial check at 1 040 km
(650 miles) is required.
(4) See Severe Driving Condition.
(5) A Noise Emission Control
Service.
(6) The California Air Resources
Board has determined that the
failure to perform this maintenance
item will not nullify the emission
warranty or limit recall liability prior
to the completion of vehicle useful
life. GM, however, urges that all
recommended maintenance
services be performed at the
indicated intervals.
Explanation of Complete
Vehicle Maintenance Schedule
(Gasoline Vehicles)
The following is a brief explanation
of each of the services listed in the
preceding Complete Vehicle
Maintenance Schedule for gasoline
vehicles. 1. ENGINE OIL :
Change at
intervals noted below depending
upon driving conditions.
• NORMAL SERVICE - Change
every 12 000 km (7,500 miles) or
12 months whichever occurs first.
• SEVERE SERVICE- Change every
4 800 km (3,000 miles) or 3 months
if you often drive under one or more
of these conditions (a) driving in
dusty areas, (b) frequent idling or
idling for long periods, (c) driving
6 km (4 miles) or less in freezing
weather, or other short trips in cold
weather, where the engine does not
thoroughly warm up. Change oil and
filter as soon as you can after
driving in a dust storm.
2. OIL FILTER : Change at intervals
noted below depending upon driving
conditions.
• NORMAL SERVICE - Change
every 12 000 km (7,500 miles) or
12 months whichever occurs first.
• SEVERE SERVICE- Change every
4 800 km (3,000 miles) or 3 months
whichever occurs first. 3. COOLING SYSTEM SERVICE :
At 24 months or 48 000 km
(30,000 miles) intervals, wash
radiator cap and filler neck with
clean water, pressure test system
and radiator cap for proper pressure
holding capacity, tighten hose
clamps and inspect condition of all
cooling and heater hoses. Replace
hoses if cracked, swollen or
otherwise deteriorated.
Also each 24 months or 48 000 km
(30,000 miles), clean exterior of
radiator core.
4. ENGINE COOLANT :
Every
80 000 km (50,000 miles), drain the
engine coolant by opening the drain
plug at the bottom of the radiator
core, flush and refill the engine
cooling system with a new 50/50
engine coolant solution.
5. AIR CLEANER FILTER : Change
every 48 000 km (30,000 miles).
6. POSITIVE CRANKCASE
VENTILATION (PCV) SYSTEM :
Check that PCV system works
properly. Replace the valve and any
worn, plugged or collapsed hoses
as necessary.

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352 Service and Maintenance
7. SPARK PLUGS :Change every
160 000 km (100,000 miles).
8. SPARK PLUG WIRES : Clean
wires and inspect for burns, cracks
or other damage. Check the wire
boot fit at the coilpack and at the
spark plugs. And replace every
160 000 km (100,000 miles).
9. FUEL TANK, CAP AND LINES :
Inspect the fuel tank, cap and lines
for damage or leaks. Remove fuel
cap, inspect gasket for an even filler
neck imprint, and any damage.
Replace parts as needed.
10. ENGINE ACCESSORY DRIVE
BELT(S) : Inspect belts. Look for
cracks, fraying, wear, and proper
tension. Adjust or replace as
needed, and change every
160 000 km (100,000 miles).
11. EVAPORATIVE CONTROL
SYSTEM (ECS) : Visually check all
fuel and vapor lines and hoses for
proper hookup, routing, and
condition. Check that bowl vent and
purge valves work properly,
if equipped. Replace as needed. 12. SHIELDS AND UNDER HOOD
INSULATION :
Inspect shields and
under hood insulation for damage or
looseness. Adjust or replace as
required.
13. AIR INTAKE SYSTEM : Check
the air intake system installation to
see that gaskets are seated
properly and all hose connections,
fasteners, and other components
are tight. Also check to be sure that
the air cleaner housing is properly
seated, that the cover fits tightly,
and the wingnut(s) is/are tight.
Tighten connections and fasteners
or replace damaged parts as
required.
14. THERMOSTATICALLY
CONTROLLED ENGINE COOLING
FAN : With the engine off and below
normal operating temperature,
check to see that the fan can be
rotated by hand on fluid coupling or
viscous drives. Replace as
necessary. 15. AUTOMATIC TRANSMISSION
FLUID :
Check the automatic transmission
fluid level at each engine oil change
and replace fluid every 84 000 km
(52,500 miles). To check the fluid
level, first set the parking brake,
then start the engine in "P" position.
With the regular brakes applied,
move the selector lever through all
the gear positions, ending with "P".
You must check the fluid level with
the engine running at slow idle and
the truck must be on a level surface.

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Service and Maintenance 353
If you have driven for a prolonged
period of time or in city traffic in hot
weather, wait until the fluid cools
down (Approx. 30 minutes) before
checking fluid level.
Single cab: Remove the dipstick
located at the rear right side of the
engine.
Crew cab: Remove the dipstick
located beneath the rear-of- engine
inspection panel. After unlatching
the A/T fluid inspection cover, the
dipstick will be visible.
Carefully touch the wet end of the
dipstick to find out if the fluid is cool,
warm or hot. Wipe it clean and push
it back in until the cap seats. Pull
out the dipstick and read the fluid
level.
If it felt cool, about room
temperature, the level should be in
the "C" range.
If it felt warm, about normal
operating temperature of 70 °C to
80 °C (158 °F to 176 °F), the level
should be in the "H" range.
16. ROTATE TIRES :To equalize
wear, rotate tires and adjust tire
pressures at every 12 000 km
(7,500 miles). See Tire Rotation
0 323.
17. BRAKE LINING AND PAD FOR
WEAR : Check drum brake linings
and disc brake pads for wear or
cracks at every 12 000 km
(7,500 miles). Check brakes
(including parking brake) more often
if conditions and habits result in
frequent braking.
Front disc brakes have built-in wear
indicators which are designed to
make a high pitched squeal or
cricket-like warning sound when the
brake pads are worn to the point
where new pads are needed. When the truck is in motion, the
sound may be constant or it may
come and go.
Pressing the brake pedal firmly may
cause the sound to stop.
Have the brake linings or the brake
pads replaced by your authorized
dealer as soon as possible after the
warning first becomes evident.
Failure to do so can result in
expensive damage to the brake
system or a serious accident.
18. BRAKE DRUM AND ROTOR
FOR WEAR AND DAMAGE :
Check brake drums (rear and
parking) and rotors for wear or
damage every 48 000 km
(30,000 miles) or 12 months
whichever occurs first.
19. BRAKE ELECTRIC VACUUM
PUMP (4500 Model) :
Inspect the
brake electric vacuum pump
operation every 12 000 km
(7,500 miles) or 12 months,
whichever occurs first.