2018 CHEVROLET LOW CAB FORWARD headlamp

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
258 Vehicle Care
3. Tilt the turn signal lamp unitdown toward the front of the
vehicle and remove it.
4. Disconnect the connector (1)for the turn signal lamp from
the socket (2) and then remove
the lamp.
5. Remove the headlamp. Remove the headlamp
connectors and parking lamp
connectors, followed by
removing the headlamp
assembly.
6. Disengage the rubber seals (2)from the two projections (3) at
the bottom of the headlamp.
Remove the four bolts (1).
7. Disconnect the headlamp
connector (5) and the parking
lamp socket (3). Remove the
headlamp assembly.
When removing the headlamp
connector, pull out the
connector while holding the
center portion of the rubber
boot. Otherwise, the headlamp
bulb will be broken.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
Vehicle Care 259
8. Remove the rubber boot (2).Push the right side of the
clip (1) that holds the bulb (3)
in place and slide it upwards to
disengage the clip.
9. Remove the bulb (1) from thesocket (2) and replace with a
new one.
10. After replacing the bulb, reverse steps 1-8 to install.
Do not touch the glass of the bulb
with your hand. Soiling the glass will
cause the bulb to blow out.
When attaching the rubber boot,
press in both the outside and inside
circumference of it. Make sure that
the rubber boot, the headlamp
assembly, and the bulb are securely
installed without any raised section.
If the rubber boot is not firmly in
place, water could get inside the
headlamp and lead to a breakdown.
Replacing Parking Lamps
1. Refer to “Replacing the
Headlamps” and remove the
headlamp assembly.
2. Pull the bulb out from the parking lamp socket and
replace with a new one.

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
320 Service and Maintenance
Front
1. Roofmarker Lamp(Identification/
Clearance Lamp)
2. Front Turn Signal Lamp
3. Side Turn Signal Lamp/ Sidemarker Lamp
4. Cornering Lamp
5. Side Reflector
6. Headlamp/Parking Lamp
Rear
1. Rear Turn Signal Lamp
2. Back-up Lamp
3. License Plate Lamp
4. Taillamp/Stoplamp
Lubrication
One of the most important items of
good vehicle care is the lubrication
of all necessary points with the
Right Lubricant, at the Right Time
and in the Right Way. It is the
owner's responsibility to maintain
proper lubrication practices as
recommended in the following
pages. Greasing Chassis Components
The type (characteristics) of the
grease specified for use with a
chassis component differs from that
of the grease specified for use with
another component. Be sure to use
only the specified grease for each
component and perform greasing
according to the Maintenance
Schedule.
King pins (left and right)

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
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

Chevrolet Low Cab Forward Owner Manual (GMNA-Localizing-U.S.-
11254764) - 2018 - crc - 12/5/16
354 Index
Fuel (cont'd)Running out of Fuel . . . . . . . . . . . 212
Water in Fuel . . . . . . . . . . . . . . . . . 209
Fuel for Diesel Engines . . . . . . . . . 206
G
Gauges
Diesel Exhaust Fluid (DEF) . . . . . 73
Engine Coolant Temperature . . . 72
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Odometer . . . . . . . . . . . . . . . . . . . . . . . 71
Speedometer . . . . . . . . . . . . . . . . . . . 71
Tachometer . . . . . . . . . . . . . . . . . . . . . 72
Trip Odometer . . . . . . . . . . . . . . . . . . 71
Warning Lights and Indi-cators . . . . . . . . . . . . . . . . . . . . . . . . . 69
General Information Vehicle Care . . . . . . . . . . . . . . . . . . 218
Getting In and Out of the Ve-
hicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Glove Box . . . . . . . . . . . . . . . . . . . . . . . 55
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . 344
H
Hazard Warning Flashers . . . . . . . . 94
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 254
Bulb Replacement . . . . . . . 254, 257 Headlamps (cont'd)
Daytime Running Lamps
(DRL) Indicator Light . . . . . . . . . . 82
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 93
High-Beam On Light . . . . . . . . . . . . 81
High/Low Beam Changer . . . . . . . 93
Heated Mirrors . . . . . . . . . . . . . . . . . . . 34
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . 154
Heating . . . . . . . . . . . . . . . . . . . . . . . . . 115
High Idle System . . . . . . . . . . . . . . . 155
High-Beam On Light . . . . . . . . . . . . . 81
Hill and Mountain Roads . . . . . . . . 132
Hooks Shopping Bag . . . . . . . . . . . . . . . . . . 58
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
I
Idle Shutdown . . . . . . . . . . . . . . . . . . 155
Idle Shutdown Light . . . . . . . . . . . . . 81
Ignition Positions . . . . . . . . . . . . . . . 148
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 51
Information on Loading the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . 58
Instrument Cluster . . . . . . . . . . . . . . . 70
Instrument Panel Storage Area . . . . . . . . . . . . . . . . . . . 55 Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . . . 287
K
Keyless EntryRemote (RKE) System . . . . . . . . . 26
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
L
Lamps Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Cornering . . . . . . . . . . . . . . . . . . . . . . . 95
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Exterior Controls . . . . . . . . . . . . . . . . 92
Interior . . . . . . . . . . . . . . . . . . . . . . . . 264
License Plate . . . . . . . . . . . . . . . . . 263
Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . 74
Roofmarker . . . . . . . . . . . . . . . . . . . 261
Sidemarker . . . . . . . . . . . . . . . . . . . 261
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . . 48
Lighter, Cigarette . . . . . . . . . . . . . . . . 67
Lighting Illumination Control . . . . . . . . . . . . . 95
Lights
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . . . 77