2018 CHEVROLET LOW CAB FORWARD air condition

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
318 Service and Maintenance
Recommended Daily
(Pre-operation) Inspections
These checks are in addition to, not
instead of, any legally required daily
inspections. See related topics
under "Maintenance Schedule",
especially if problems are found.
For safe and comfortable driving,
keep record of the distances driven
and the condition of the vehicle
during operation. Perform
inspections at appropriate intervals,
and perform maintenance in
accordance with the findings of the
inspections. If an inspection reveals
an abnormality or there was an
abnormality the previous time the
vehicle was driven, have the vehicle
repaired by the nearest dealer
before it is driven again.1. Components that showed abnormalities during the
previous operation
.Check components that
showed abnormalities
during the previous
operation 2. Checks performed at the
engine
.Fan belt looseness and
damage
. Engine oil level
. Engine coolant level
. Power steering fluid level
3. Checks performed from the driver's seat
.Brake fluid level
. Brake pedal free play
. Operation of meters,
gauges and warning/
indicator lights
. Engine startability,
abnormal noise and color of
exhaust gases
. Parking brake lever stroke
. Windshield washer fluid
spray condition and
windshield wiper
effectiveness
. Windshield washer fluid
level .
Steering wheel position and
free play
. Operation of horn and turn
signal lights
. Door lock operation
4. Checks performed during a walk around the vehicle
.Illumination, flashing,
contamination, damage and
obstruction of lights
. Contamination, damage ad
obstruction of windows,
mirrors and reflectors
. Leaf spring damage
. Oil, engine coolant, fuel,
brake fluid and power
steering fluid leaks
. Water separator
5. Checking wheels and tires .Air pressure
. Cracks and other damage
. Abnormal wear
. Tread depth
. Mounting condition of all
wheel nuts

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
324 Service and Maintenance
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 0159).
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
a while. If you notice diesel fumes or
fluid at any time, have the cause
found and corrected at once.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
Technical Data 341
Engine Drive Belt Routing
Fan Belt and Air Conditioning
Compressor Belt
See theMaintenance Schedule
0 303.
No. Name
1 Fan belt
2 Fan pulley
3 A/C belt
4 A/C compressor
5 Tension pulley No.
Name
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.-
11254764) - 2018 - crc - 12/5/16
Index 351
IndexA
Accessories and Modifica-tions . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Add-On Electrical Equipment . . . 215
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . 323
Adjustments Seat, Initial Drive . . . . . . . . . . . . . . . 38
Agreements Trademarks and License . . . . . .114
Air Cleaner/Filter, Engine . . . . . . . 231
Air Conditioning . . . . . . . . . . . . . . . . 115
Air Filter, Passenger Com- partment . . . . . . . . . . . . . . . . . . . . . . 119
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 118
AM-FM Radio . . . . . . . . . . . . . . . . . . . . 97
Antenna Fixed Mast . . . . . . . . . . . . . . . . . . . 102
Antilock Brake System (ABS) . . . 196
Warning Light . . . . . . . . . . . . . . . . . . . 77
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 293
Interior . . . . . . . . . . . . . . . . . . . . . . . . 299
Ashtrays . . . . . . . . . . . . . . . . . . . . . . . . . 68
Assistance Program,
Roadside . . . . . . . . . . . . . . . . . . . . . . 344
Audio Players CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Automatic
Transmission . . . . . . . . . . . . . . . . . 185
Transmission Fluid . . . . . . . . . . . 229
Automatic Transmission Selector Lever . . . . . . . . . . . . . . . . 194
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . 251
Automatic Transmission Fluid Temperature Warning Light . . . . . 78
Automatic Transmission Overdrive Off . . . . . . . . . . . . . . . . . . 195
Auxiliary Devices . . . . . . . . . . . . . . . . . . . . . . . .113
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 249
B
Battery . . . . . . . . . . . . . . . . . . . . . . . . . 247
Battery - North America . . . . . . . . . 287
Battery Warning Light . . . . . . . . . . . . 73
Biodiesel . . . . . . . . . . . . . . . . . . . . . . . 207
Blade Replacement, Wiper . . . . . 252
Brake Exhaust . . . . . . . . . . . . . . . . . . . . . . 201
System Warning Light . . . . . . . . . . 75
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 242 Antilock . . . . . . . . . . . . . . . . . . . . . . . 196
Exhaust Light . . . . . . . . . . . . . . . . . . . 78
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Parking . . . . . . . . . . . . . . . . . . . . . . . 200

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
352 Index
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 126
Break-In, New Vehicle . . . . . . . . . . 147
Bulb ReplacementHeadlamp Aiming . . . . . . . . . . . . . 254
Headlamps . . . . . . . . . . . . . . . . . . . 254
Headlamps and Front TurnSignal . . . . . . . . . . . . . . . . . . . . . . . 257
Interior Lamps . . . . . . . . . . . . . . . . 264
License Plate Lamps . . . . . . . . . 263
Roofmarker Lamps . . . . . . . . . . . 261
Sidemarker Lamps . . . . . . . . . . . 261
Taillamps, Turn Signal, Sto- plamps, and Back-up
Lamps . . . . . . . . . . . . . . . . . . . . . . 263
Buzzers, Warning . . . . . . . . . . . . . . . . 91
C
Cab Tilting . . . . . . . . . . . . . . . . . . . . . . 220
California Perchlorate Materials Re-quirements . . . . . . . . . . . . . . . . . . 218
California Proposition 65 Warning . . . . . . . . . . . . . . . 218, 287
Capacities and Specifica- tions . . . . . . . . . . . . . . . . . . . . . . . . . . 335
Carbon Monoxide
Engine Exhaust . . . . . . . . . . . . . . . 159
Winter Driving . . . . . . . . . . . . . . . . 133
Cargo Lamp . . . . . . . . . . . . . . . . . . . . . 96 Caution, Danger, and Warning . . . . 3
CD Player . . . . . . . . . . . . . . . . . . . . . . 103
Check
Engine Light (Malfunction In-dicator) . . . . . . . . . . . . . . . . . . . . . . . . 74
Child Restraints Infants and Young Children . . . . . 51
Systems . . . . . . . . . . . . . . . . . . . . . . . . 51
Cigarette Lighter . . . . . . . . . . . . . . . . . 67
Cleaning Exterior Care . . . . . . . . . . . . . . . . . 293
Interior Care . . . . . . . . . . . . . . . . . . 299
Climate Control Systems . . . . . . . 115 Air Conditioning . . . . . . . . . . . . . . .115
Heating . . . . . . . . . . . . . . . . . . . . . . . .115
Cluster, Instrument . . . . . . . . . . . . . . 70
Cold Weather Operation . . . . . . . . 209
Collision Damage Repair . . . . . . . 345
Compartments
Storage . . . . . . . . . . . . . . . . . . . . . . . . . 54
Control of a Vehicle . . . . . . . . . . . . . 122
Coolant
Engine . . . . . . . . . . . . . . . . . . . . . . . . 231
Engine Temperature Gauge . . . . 72
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . 115
Cornering Lamps . . . . . . . . . . . . . . . . 95
Cover
Engine . . . . . . . . . . . . . . . . . . . . . . . . 222 Covers
Winter . . . . . . . . . . . . . . . . . . . . . . . . 154
Cruise Control . . . . . . . . . . . . . . . . . . 202 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Cupholders . . . . . . . . . . . . . . . . . . . . . . 56
Customer Assistance . . . . . . . . . . . 343 Offices . . . . . . . . . . . . . . . . . . . . . . . . 343
Text Telephone (TTY)
Users . . . . . . . . . . . . . . . . . . . . . . . 343
Customer Information Service Publications Order-
ing Information . . . . . . . . . . . . . . 347
Customer Satisfaction Pro- cedure . . . . . . . . . . . . . . . . . . . . . . . . 342
D
Damage Repair, Collision . . . . . . . 345
Danger, Warning, and Caution . . . . 3
Daytime Running Lamps (DRL)Indicator Light . . . . . . . . . . . . . . . . . . 82
Devices
Auxiliary . . . . . . . . . . . . . . . . . . . . . . .113
Diesel Engine Engine Alarm and Auto-matic Shutdown . . . . . . . . . . . . . 155
High Idle System . . . . . . . . . . . . . 155
Diesel Exhaust Fluid . . . . . . . . 24, 170
Diesel Exhaust Fluid (DEF) Gauge . . . . . . . . . . . . . . . . . . . . . . . . . 73