2023 CHEVROLET SILVERADO 2500 engine coolant

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
320 Vehicle Care
normal idle speed for at least five minutes
while the vehicle is parked. If the warning is
still there, turn off the engine and get
everyone out of the vehicle until it
cools down.
If there is no sign of steam, idle the engine
for five minutes while parked. If the warning
is still displayed, turn off the engine until it
cools down.
Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and
the ENGINE POWER IS REDUCED message
displays, an overheat protection mode which
alternates firing groups of cylinders helps to
prevent engine damage. In this mode, a loss
in power and engine performance will be
noticed. This operating mode allows the
vehicle to be driven to a safe place in an
emergency. Driving extended distances and/
or towing a trailer in the overheat
protection mode should be avoided.
If the engine or transmission detects an
impending hot fluid condition, then the
transmission may force upshifts to limit
temperatures. Downshifts may also be
prevented in this instance. Normal operationmay continue unless the display indicates
there is a hot condition and engine should
be idled.
Caution
After driving in the overheated engine
protection operating mode, the engine oil
will be severely degraded. Any repairs
performed before the engine is cool may
cause engine damage. Allow the engine
to cool before attempting any repair.
Repair the cause of coolant loss, change
the oil, and reset the oil life system. See
Engine Oil
0311.
Engine Fan
If the vehicle has the Duramax diesel
engine, see the Duramax diesel supplement.
The vehicle has a clutched engine cooling
fan. When the clutch is engaged, the fan
spins faster to provide more air to cool the
engine. In most everyday driving conditions,
the fan is spinning slower and the clutch is
not fully engaged. This improves fuel
economy and reduces fan noise. Under
heavy vehicle loading, trailer towing, and/or
high outside temperatures, the fan speed
increases as the clutch more fully engages, so an increase in fan noise may be heard.
This is normal and should not be mistaken
as the transmission slipping or making extra
shifts. It is merely the cooling system
functioning properly. The fan will slow down
when additional cooling is not required and
the clutch partially disengages.
This fan noise may be heard when starting
the engine. It will go away as the fan clutch
partially disengages.
Power Steering Fluid
The power steering fluid reservoir is in the
engine compartment on the driver side of
the vehicle. See
Engine Compartment
Overview 0310 for reservoir location.
When to Check Power Steering Fluid
It is not necessary to regularly check power
steering fluid unless there is a leak
suspected in the system or an unusual noise

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
322 Vehicle Care
Caution (Continued)
.Do not use engine coolant (antifreeze)
in the windshield washer. It can
damage the windshield washer system
and paint.
.Do not mix water with ready-to-use
washer fluid. Water can cause the
solution to freeze and damage the
washer fluid tank and other parts of
the washer system.
.When using concentrated washer fluid,
follow the manufacturer instructions
for adding water.
.Fill the washer fluid tank only
three-quarters full when it is very cold.
This allows for fluid expansion if
freezing occurs, which could damage
the tank if it is completely full.
Brakes
Disc brake linings have built-in wear
indicators that make a high-pitched warning
sound when the brake linings are worn and
new linings are needed. The sound can come
and go or can be heard all the time when
the vehicle is moving, except when applying
the brake pedal firmly.
{Warning
The brake wear warning sound means
that soon the brakes will not work well.
That could lead to a crash. When the
brake wear warning sound is heard, have
the vehicle serviced.
Caution
Continuing to drive with worn-out brake
linings could result in costly brake
repairs.
Some driving conditions or climates can
cause a brake squeal when the brakes are
first applied, clearing up following several
applications. This does not mean something
is wrong with the brakes.
Properly torqued wheel nuts are necessary
to help prevent brake pulsation. When tires
are rotated, inspect brake linings for wear
and evenly tighten wheel nuts in the proper
sequence to torque specifications. See
Capacities and Specifications 0406.
Brake pads should be replaced as complete
axle sets.
Brake Pedal Travel
See your dealer if the brake pedal does not
return to normal height, or if there is a
rapid increase in pedal travel. This could be
a sign that brake service may be required.
Replacing Brake System Parts
Always replace brake system parts with
new, approved replacement parts. If this is
not done, the brakes may not work
properly. The braking performance can
change in many ways if the wrong brake
parts are installed or if parts are improperly
installed.
Brake Pad Life System
When to Change Brake Pads
This vehicle has a system that estimates the
remaining life of the front and rear brake
pads. Brake pad life is displayed in the
Driver Information Center (DIC), along with
a percentage for each axle. The system must
be reset every time the brake pads are
changed.
When the system has determined that the
brake pads need to be replaced, a message
will display, which may include mileage
remaining.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
Service and Maintenance 393
Passenger Compartment Air Filter
The passenger compartment air filter
removes dust, pollen, and other airborne
irritants from outside air that is pulled into
the vehicle. The filter should be replaced as
part of routine scheduled maintenance.
Inspect the passenger compartment air filter
every 36 000 km/22,500 miles or two years,
whichever comes first. Replace if necessary.
More frequent replacement may be needed
if the vehicle is driven in areas with heavy
traffic, areas with poor air quality, or areas
with high dust levels. Replacement may also
be needed if there is a reduction in air flow,
excessive window fogging, or odors.
Power Take Off (PTO) and Extended
Idle Use
When the vehicle is used with the PTO
equipment or used in a way that requires
extended idle time, one hour of use shall be
deemed the same as 53 km (33 mi). See
Driver Information Center (DIC) (Base Level)
0124 or
Driver Information Center (DIC) (Midlevel and
Uplevel) 0125 for hourmeter, if equipped.
Air Conditioning Desiccant (Replace Every
Seven Years)
The air conditioning system requires
maintenance every seven years. This service
requires replacement of the desiccant to
help the longevity and efficient operation of
the air conditioning system. This service can
be complex. See your dealer.
Tire Rotation and Required Services
Every 12 000 km/7,500 mi
Rotate the tires, if recommended for the
vehicle, and perform the following services.
See Tire Rotation 0356.
.Check engine oil level and oil
life percentage. If needed, change engine
oil and filter, and reset oil life system.
See Engine Oil 0311 and
Engine Oil Life System 0313.
.Check the air filter life percentage.
If necessary, replace the engine air filter
and reset the engine air filter life system.
See Engine Air Filter Life System 0314.
.Check engine coolant level. See Cooling
System 0316.
.Check windshield washer fluid level. See
Washer Fluid 0321.
.Check tire inflation pressures, including
the spare. See Tire Pressure0349.
.Inspect tire wear. See Tire Inspection
0 355.
.Visually check for fluid leaks.
.Inspect brake system. See Exterior Care
0 381.
.Visually inspect steering, suspension, and
chassis components for damage, including
cracks or tears in the rubber boots, loose
or missing parts, or signs of wear at least
once a year. See Exterior Care0381.
If equipped with grease fittings, lubricate
the suspension and steering components
every oil change.
.Inspect power steering for proper
attachment, connections, binding, leaks,
cracks, chafing, etc.
.Visually inspect drive shafts for excessive
wear, lubricant leaks or damage including:
tube dents, cracks, constant velocity joint
or universal joint looseness, cracked or
missing boots, loose or missing boot
clamps, center bearing excessive
looseness, missing or loose fasteners.
.Check restraint system components. See
Safety System Check 061.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
Service and Maintenance 401
Recommended Fluids, Lubricants, and Parts
Recommended Fluids and Lubricants
This maintenance section applies to vehicles with a gasoline engine. If the vehicle has a diesel engine, see“Recommended Fluids and Lubricants”
in the Duramax diesel supplement.
Fluids and lubricants identified below by name or specification, including fluids or lubricants not listed here, can be obtained from your dealer.
Usage Fluid/Lubricant
Automatic Transmission (6-Speed Transmission) DEXRON-VI Automatic Transmission Fluid.
Automatic Transmission (10-Speed Transmission) DEXRON ULV Automatic Transmission Fluid.
Chassis Lubrication Chassis lubricant meeting requirements of NLGI #2, Category LB or GC-LB. Engine Coolant 50/50 mixture of clean, drinkable water and use only DEX-COOL coolant. See Cooling System
0 316.
Engine Oil Engine oil meeting the dexos1 specification of the proper SAE viscosity grade. ACDelco dexos1 full synthetic is recommended. See Engine Oil0311.
Front and Rear Axle Driveshaft Splines See your dealer.
Front Axle (Four-Wheel Drive) and Rear Axle See your dealer. Hydraulic Brake System DOT 4 Hydraulic Brake Fluid. See Brake Fluid0323.
Hydraulic Power Steering System GM Power Steering Fluid. See your dealer.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
430 Index
CheckEngine Light (Malfunction Indicator) . . . . 116
Ignition Transmission Lock . . . . . . . . . . . . . 328
Child Restraints Infants and Young Children . . . . . . . . . . . . . 74
Lower Anchors and Tethers forChildren . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Older Children . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Securing . . . . . . . . . . . . . . . . . . . . . . . . 89, 93, 95
Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . 336
Cleaning
Exterior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 381
Interior Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 386
Climate Control Systems . . . . . . . . . . . . . . . . . 202 Air Conditioning . . . . . . . . . . . . . . . . . . . . . . . 202
Dual Automatic . . . . . . . . . . . . . . . . . . . . . . . . 204
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202
Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Cluster, Instrument . . . . . . . . . . . . . . . . . . . . . . 107
Collision Damage Repair . . . . . . . . . . . . . . . . . .415
Compartments Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Compass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Connected Services Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . 425
Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 427
Navigation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 425 Connections
Connected Services . . . . . . . . . . . . . . . . . . . . 425
Control Hill Descent . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Traction and Electronic Stability . . . . . . . 247
Control Light Hill Descent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Control of a Vehicle . . . . . . . . . . . . . . . . . . . . . . 211
Controls Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . . 151
Convex Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Coolant
Engine Temperature Gauge . . . . . . . . . . . . . 113
Engine Temperature Warning Light . . . . . 121
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202, 204
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Courtesy Transportation Program . . . . . . . . 414
Coverage Explanations . . . . . . . . . . . . . . . . . . . . 173
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Cupholders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Customer Assistance . . . . . . . . . . . . . . . . . . . . . . 411
Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
Text Telephone (TTY) Users . . . . . . . . . . . . . 411
Customer Information
Publications Ordering Information . . . . . 416
Customer Satisfaction Procedure . . . . . . . . . 409
Cybersecurity . . . . . . . . . . . . . . . . . . . . . . . . . . . . 418D
Damage Repair, Collision . . . . . . . . . . . . . . . . . .415
Danger, Warning, and Caution . . . . . . . . . . . . . .2
Data Collection Infotainment System . . . . . . . . . . . . . . . . . . 419
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 419
Data Recorders, Event . . . . . . . . . . . . . . . . . . . 419
Database Coverage Explanations . . . . . . . . . . 173
Daytime Running Lamps (DRL) . . . . . . . . . . . . 141
Defensive Driving . . . . . . . . . . . . . . . . . . . . . . . . . 211
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
Diagnostics Connected Services . . . . . . . . . . . . . . . . . . . . 427
Distracted Driving . . . . . . . . . . . . . . . . . . . . . . . . 210
Dome Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .145
Door Ajar Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . 22
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Power Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Drive Belt Routing, Engine . . . . . . . . . . . . . . . 408
Driver Teen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Driver Assistance Systems . . . . . . . . . . . . . . . 252
Driver Information Center (DIC) . . . . . . 124, 125
Driver Mode Control . . . . . . . . . . . . . . . . . . . . . 249
Driver Mode Control Light . . . . . . . . . . . . . . . . 121

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
Index 431
DrivingAssistance Systems . . . . . . . . . . . . . . . . . . . . 263
Better Fuel Economy . . . . . . . . . . . . . . . . . . . 210
Characteristics and Towing Tips . . . . . . . . 274
Defensive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Hill and Mountain Roads . . . . . . . . . . . . . . 218
If the Vehicle is Stuck . . . . . . . . . . . . . . . . . 219
Impaired . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . 213
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Off-Road Recovery . . . . . . . . . . . . . . . . . . . . . 213
Vehicle Load Limits . . . . . . . . . . . . . . . . . . . . 220
Wet Roads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
E
E85 or FlexFuel . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Electric Parking Brake . . . . . . . . . . . . . . . . . . . . 245
Electric Parking Brake Light . . . . . . . . . . . . . . . 118
Electrical Equipment, Add-On . . . . . . . . . . . . 303
Electrical System
Engine Compartment Fuse Block . . . . . . . 336
Fuses and Circuit Breakers . . . . . . . . . . . . . 336
Instrument Panel Fuse Block . . . . . . 339, 341
Overload . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334 Electronic Stability Control (ESC) Off
Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Emergency OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 421
Engine Air Cleaner/Filter . . . . . . . . . . . . . . . . . . . . . . 315
Check Light (Malfunction Indicator) . . . . . 116
Compartment Overview . . . . . . . . . . . . . . . . 310
Coolant Temperature Gauge . . . . . . . . . . . . 113
Coolant Temperature Warning Light . . . . 121
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 316
Drive Belt Routing . . . . . . . . . . . . . . . . . . . . . 408
Exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Oil Life System . . . . . . . . . . . . . . . . . . . . . . . . 313
Oil Pressure Gauge . . . . . . . . . . . . . . . . . . . . . 112
Oil Pressure Light . . . . . . . . . . . . . . . . . . . . . . 122
Overheated ProtectionOperating Mode . . . . . . . . . . . . . . . . . . . . . 320
Overheating . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Power Messages . . . . . . . . . . . . . . . . . . . . . . . 130
Running While Parked . . . . . . . . . . . . . . . . . 235
Starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Engine Air Filter Life System . . . . . . . . . . . . . .314
Entry Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Equipment, Towing . . . . . . . . . . . . . . . . . . . . . . .281
Event Data Recorders . . . . . . . . . . . . . . . . . . . . 419 Exit Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Extended Parking . . . . . . . . . . . . . . . . . . . . . . . . 234
Extender, Seat Belt . . . . . . . . . . . . . . . . . . . . . . . .61
Exterior Cargo Lamps . . . . . . . . . . . . . . . . . . . . 144
Exterior Lamp Controls . . . . . . . . . . . . . . . . . . . 139
Exterior Lamps Off Reminder . . . . . . . . . . . . . 141
Exterior Lighting Battery Saver . . . . . . . . . . .147
F
Fan
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Filter,
Engine Air Cleaner . . . . . . . . . . . . . . . . . . . . . 315
Fixed Mast Antenna . . . . . . . . . . . . . . . . . . . . . .158
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Flashers, Hazard Warning . . . . . . . . . . . . . . . . .142
Flat Tire . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363 Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Floor Console Storage . . . . . . . . . . . . . . . . . . . . . 98
Floor Mats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 389
Fluid
Automatic Transmission . . . . . . . . . . . . . . . 314
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Power Steering . . . . . . . . . . . . . . . . . . . . . . . . 320
Washer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Fog Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .143

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
432 Index
Folding Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Forward Collision Alert (FCA) System . . . . 263
Four-WheelDrive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Drive Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Drive System . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Frequency Statement
Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 417
Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Front Fog Lamp Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Heated and Ventilated . . . . . . . . . . . . . . . . . . 53
Fuel Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270
Economy, Driving for Better . . . . . . . . . . . 210
Filling a Portable Fuel Container . . . . . . . 273
Filling the Tank . . . . . . . . . . . . . . . . . . . . 271, 272
Foreign Countries . . . . . . . . . . . . . . . . . . . . . . 270
Gauge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Low Fuel Warning Light . . . . . . . . . . . . . . . 122
Prohibited Fuels . . . . . . . . . . . . . . . . . . . . . . . 269
Recommended . . . . . . . . . . . . . . . . . . . . . . . . . 269
Top Tier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . . . . 374
Fuses Engine Compartment Fuse Block . . . . . . . 336 Fuses (cont'd)
Fuses and Circuit Breakers . . . . . . . . . . . . . 336
Instrument Panel Fuse Block . . . . . . 339, 341
G
Garage Door Opener . . . . . . . . . . . . . . . . . . . . . . 135
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
Gauges
Engine Coolant Temperature . . . . . . . . . . . . 113
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 112
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Speedometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Tachometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Warning Lights and Indicators . . . . . . . . . 107
General Information Service and Maintenance . . . . . . . . . . . . . . 391
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
Vehicle Care . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Glass Replacement . . . . . . . . . . . . . . . . . . . . . . . 329
Global Positioning System (GPS) . . . . . . . . . . 172
Glove Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
GM Mobility Reimbursement Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .412 Guidance
Problems with the Route . . . . . . . . . . . . . . . 172
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Hazard Warning Flashers . . . . . . . . . . . . . . . . .142
HD Radio Technology . . . . . . . . . . . . . . . . . . . . 156
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Head-up Display . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Headlamps
Aiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 330
Daytime Running Lamps (DRL) . . . . . . . . . . 141
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
Headlamps, Front Turn Signal,Sidemarker, and Parking Lamps . . . . . . 331
High-Beam On Light . . . . . . . . . . . . . . . . . . . 123
High/Low Beam Changer . . . . . . . . . . . . . . . 141
Lamps On Reminder . . . . . . . . . . . . . . . . . . . 123
Heated
Rear Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Steering Wheel . . . . . . . . . . . . . . . . . . . . . . . . 101
Heated and Ventilated Front Seats . . . . . . . .53
Heated Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Heater Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202, 204

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-15546003) - 2022 - CRC - 5/5/21
Index 433
High-Beam On Light . . . . . . . . . . . . . . . . . . . . . . 123
Hill and Mountain Roads . . . . . . . . . . . . . . . . .218
Hill Descent Control (HDC) . . . . . . . . . . . . . . . 248
Hill Descent Control Light . . . . . . . . . . . . . . . . . 119
Hill Start Assist (HSA) . . . . . . . . . . . . . . . . . . . . 246
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 308
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
How to Wear Seat Belts Properly . . . . . . . . . 56
HVAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 202, 204
I
If the System Needs Service . . . . . . . . . . . . . . 173
Ignition Positions . . . . . . . . . . . . . . . . . . . .227, 229
Ignition Transmission Lock Check . . . . . . . . 328
Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
IndicatorVehicle Ahead . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Infants and Young Children, Restraints . . . . 74
Information Publication Ordering . . . . . . . . . . . . . . . . . . . 416
Infotainment System . . . . . . . . . . . . . . . . . . . . 419
Instrument Cluster . . . . . . . . . . . . . . . . . . . . . . . 107
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . 38
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 148
J
Jack
Auxiliary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Jump Starting - North America . . . . . . . . . . . 374
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . 10, 13
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 9
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 345
Lamps Auxiliary Roof Mounted Lamp . . . . . . . . . 144
Daytime Running (DRL) . . . . . . . . . . . . . . . . . 141
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Exterior Cargo . . . . . . . . . . . . . . . . . . . . . . . . . 144
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . 139
Exterior Lamps Off Reminder . . . . . . . . . . . 141
Exterior Lighting Battery Saver . . . . . . . . 147
License Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Malfunction Indicator (CheckEngine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 266
Lane Departure Warning (LDW) . . . . . . . . . . 268
Lane Departure Warning Light . . . . . . . . . . . . 119
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 58 LATCH System
Replacing Parts after a Crash . . . . . . . . . . . 89
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Illumination Control . . . . . . . . . . . . . . . . . . . 145
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Task . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 114
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Brake System Warning . . . . . . . . . . . . . . . . . 117
Charging System . . . . . . . . . . . . . . . . . . . . . . . 116
Check Engine (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . 123
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Driver Mode Control . . . . . . . . . . . . . . . . . . . . 121
Electric Parking Brake . . . . . . . . . . . . . . . . . . . 118
Electronic Stability Control (ESC), Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Engine Coolant Temperature Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . 122