wheel alignment CHEVROLET SILVERADO 2500HD 2021 Owner's Manual

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
130 Instruments and Controls
Automatic Running Boards
This feature specifies the position and use of
the running boards.
Touch Off or On.
Deploy Running Boards
This feature moves the running boards to a
deployed position so they can be used with
the doors closed.
Touch Off or Deploy.
Seating Position
Touch and the following may display:
.Seat Entry Memory
.Seat Exit Memory
Seat Entry Memory
This feature automatically recalls the
previously stored 1 or 2 button positions
when the ignition is changed from off to on
or ACC/ACCESSORY. See Memory Seats046.
Touch Off or On. Seat Exit Memory
This feature automatically recalls the
previously stored exit button position when
the ignition is changed from on or ACC/
ACCESSORY to off and the driver door is
open. See
Memory Seats 046.
Touch Off or On.
Suspension
Touch and the following may display:
.Service Mode
.Alignment Mode
Service Mode
This feature disables the air suspension
system and is used to prevent unintended
raising or lowering of the suspension..
Touch Off or On.
Alignment Mode
This feature will optimize the vehicle height
to provide the most accurate wheel
alignment.
Touch Off or On.
Trailering
Touch and the following may display:
.Side Trailer Camera
.Bed View Camera Lighting
Side Trailer Camera
This feature specifies if using the turn signal
during a lane change will also display an
applicable side view of the trailer and
vehicle. See Assistance Systems for Parking
or Backing 0249.
Touch Off or On.
Bed View Camera Lighting
This feature specifies if the truck bed rail
lights are turned on when the Bed View
Camera is active. See Assistance Systems for
Parking or Backing 0249.
Touch Off or On.
Teen Driver
See “Teen Driver” underSettings 0181.
Valet Mode
This will lock the infotainment system and
steering wheel controls. It may also limit
access to vehicle storage locations,
if equipped.
To enable valet mode:
1. Enter a four-digit code on the keypad.
2. Select Enter to go to the confirmation screen.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
300 Vehicle Care
Vehicle Care
General Information
General Information . . . . . . . . . . . . . . . . . . . 301
California Proposition 65 Warning . . . . . 301
California Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . . . . . . . . . . 301
Accessories and Modifications . . . . . . . . . 302
Vehicle Checks
Doing Your Own Service Work . . . . . . . . 302
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Engine Compartment Overview . . . . . . . 304
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305
Engine Oil Life System . . . . . . . . . . . . . . . . 307
Automatic Transmission Fluid . . . . . . . . . 308
Engine Air Filter Life System . . . . . . . . . . 308
Engine Air Cleaner/Filter . . . . . . . . . . . . . . 309
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . 310
Engine Overheating . . . . . . . . . . . . . . . . . . . . 312
Overheated Engine Protection Operating Mode . . . . . . . . . . . . . . . . . . . . . 314
Engine Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314
Power Steering Fluid . . . . . . . . . . . . . . . . . . . 314
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Brake Pad Life System . . . . . . . . . . . . . . . . . 316
Brake Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Battery - North America . . . . . . . . . . . . . . . 318
Four-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . 320 Front Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Noise Control System . . . . . . . . . . . . . . . . . 320
Starter Switch Check . . . . . . . . . . . . . . . . . . . 321
Automatic Transmission Shift Lock
Control Function Check . . . . . . . . . . . . . . 322
Ignition Transmission Lock Check . . . . . . 322
Park Brake and P (Park) Mechanism Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Wiper Blade Replacement . . . . . . . . . . . . . 322
Glass Replacement . . . . . . . . . . . . . . . . . . . . . 323
Windshield Replacement . . . . . . . . . . . . . . . 323
Gas Strut(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Headlamp Aiming
Front Headlamp Aiming . . . . . . . . . . . . . . . 324
Bulb Replacement
Bulb Replacement . . . . . . . . . . . . . . . . . . . . . 324
Halogen Bulbs . . . . . . . . . . . . . . . . . . . . . . . . . 325
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps . . . . . . 325
Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps . . . . . . . . . . . . . . . . . . . . . . 326
Center High-Mounted Stoplamp (CHMSL) and Cargo Lamp . . . . . . . . . . . . 327
License Plate Lamp . . . . . . . . . . . . . . . . . . . . 328
Electrical System
Electrical System Overload . . . . . . . . . . . . 328 Fuses and Circuit Breakers . . . . . . . . . . . . . 329
Engine Compartment Fuse Block . . . . . . 329
Instrument Panel Fuse Block (Left) . . . . . 332
Instrument Panel Fuse Block (Right) . . . 334
Wheels and Tires
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336
All-Season Tires . . . . . . . . . . . . . . . . . . . . . . . . 337
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
All-Terrain Tires . . . . . . . . . . . . . . . . . . . . . . . . 337
Tire Sidewall Labeling . . . . . . . . . . . . . . . . . 338
Tire Designations . . . . . . . . . . . . . . . . . . . . . . 339
Tire Terminology and Definitions . . . . . . 339
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Tire Pressure Monitor System . . . . . . . . . 342
Tire Pressure Monitor Operation . . . . . . 343
Tire Inspection . . . . . . . . . . . . . . . . . . . . . . . . 348
Tire Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . 348
When It Is Time for New Tires . . . . . . . . 350
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 351
Different Size Tires and Wheels . . . . . . . . 352
Uniform Tire Quality Grading . . . . . . . . . . 352
Wheel Alignment and Tire Balance . . . . 354
Wheel Replacement . . . . . . . . . . . . . . . . . . . 354
Tire Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 355
Tire Changing . . . . . . . . . . . . . . . . . . . . . . . . . 356
Full-Size Spare Tire . . . . . . . . . . . . . . . . . . . . 366
Jump Starting
Jump Starting - North America . . . . . . . . 367

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
348 Vehicle Care
performed successfully. See "TTPMS
Sensor Learning Process" underTrailering
App 0286.
.Operating electronic devices or being near
facilities using radio wave frequencies
similar to the TTPMS could cause
interference to the TTPMS which could
cause loss of signal reception from the
sensor.
.If the system does not receive the signal
from an individual sensor, an error
message may not occur until the vehicle
has been driver for a period of time.
If the TTPMS is not functioning properly, it
cannot detect or signal a low tire condition.
See your dealer for service if the DIC
message comes on and stays on when the
trailer tire pressures have been checked and
determined to be correct.
Tire Inspection
We recommend that the tires, including
the spare tire, if the vehicle has one, be
inspected for signs of wear or damage
at least once a month.
Replace the tire if:
.The indicators at three or more
places around the tire can be seen.
.There is cord or fabric showing
through the tire's rubber.
.The tread or sidewall is cracked, cut,
or snagged deep enough to show
cord or fabric.
.The tire has a bump, bulge, or split.
.The tire has a puncture, cut, or other
damage that cannot be repaired well
because of the size or location of the
damage.
Tire Rotation
Tires should be rotated every 12 000 km
(7,500 mi). See Maintenance Schedule
0 384.
Tires are rotated to achieve a more
uniform wear for all tires. The first
rotation is the most important.
Anytime unusual wear is noticed, rotate
the tires as soon as possible, check for
proper tire inflation pressure, and check
for damaged tires or wheels. If the
unusual wear continues after the
rotation, check the wheel alignment.
See When It Is Time for New Tires
0 350 and Wheel Replacement 0354. If the full-size spare tire is part of the
tire rotation, make sure the tire rotated
into the spare position is stored
securely. Push, pull, and then try to
rotate or turn the tire. If it moves, use
the wheel wrench/hoist shaft to tighten
the cable. See
Tire Changing0356.
Use this rotation pattern when rotating
the tires if the vehicle has single rear
wheels.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
354 Vehicle Care
Wheel Alignment and Tire
Balance
The tires and wheels were aligned and
balanced at the factory to provide the
longest tire life and best overall
performance. Adjustments to wheel
alignment and tire balancing are not
necessary on a regular basis. Consider an
alignment check if there is unusual tire wear
or the vehicle is significantly pulling to one
side or the other. Some slight pull to the
left or right, depending on the crown of the
road and/or other road surface variations
such as troughs or ruts, is normal. If the
vehicle is vibrating when driving on a
smooth road, the tires and wheels may
need to be rebalanced. See your dealer for
proper diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked,
or badly rusted or corroded. If wheel nuts
keep coming loose, the wheel, wheel bolts,
and wheel nuts should be replaced. If the
wheel leaks air, replace it. Some aluminum
wheels can be repaired. See your dealer if
any of these conditions exist.Your dealer will know the kind of wheel that
is needed.
Each new wheel should have the same
load-carrying capacity, diameter, width,
offset, and be mounted the same way as
the one it replaces.
Replace wheels, wheel bolts, wheel nuts,
or Tire Pressure Monitor System (TPMS)
sensors with new GM original equipment
parts.
{Warning
Using the wrong replacement wheels,
wheel bolts, or wheel nuts can be
dangerous. It could affect the braking and
handling of the vehicle. Tires can lose air,
and cause loss of control, causing a crash.
Always use the correct wheel, wheel
bolts, and wheel nuts for replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake cooling,
speedometer or odometer calibration,
headlamp aim, bumper height, vehicle
ground clearance, and tire or tire chain
clearance to the body and chassis.
Used Replacement Wheels
{Warning
Replacing a wheel with a used one is
dangerous. How it has been used or how
far it has been driven may be unknown.
It could fail suddenly and cause a crash.
When replacing wheels, use a new GM
original equipment wheel.
Tire Chains
{Warning
If the vehicle has LT275/65R20 size tires,
do not use tire chains. There is not
enough clearance. Tire chains used on a
vehicle without the proper amount of
clearance can cause damage to the
brakes, suspension, or other vehicle parts.
The area damaged by the tire chains
could cause loss of control and a crash.
Use another type of traction device only
if its manufacturer recommends it for the
vehicle's tire size combination and road
conditions. Follow that manufacturer's
instructions. To avoid vehicle damage,
drive slow and readjust or remove the
(Continued)

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
392 Service and Maintenance
.Trained dealer technicians can inspect and
recommend the right tires. Your dealer
can also provide tire/wheel balancing
services to ensure smooth vehicle
operation at all speeds. Your dealer sells
and services name brand tires.
Vehicle Care
To help keep the vehicle looking like new,
vehicle care products are available from your
dealer. For information on how to clean and
protect the vehicle’s interior and exterior,
see Interior Care 0378 and
Exterior Care 0373. Wheel Alignment
Wheel alignment is critical for ensuring that
the tires deliver optimal wear and
performance.
.Signs that the alignment may need to be
adjusted include pulling, improper vehicle
handling, or unusual tire wear.
.Your dealer has the required equipment
to ensure proper wheel alignment.
Windshield
For safety, appearance, and the best
viewing, keep the windshield clean and
clear.
.Signs of damage include scratches, cracks,
and chips.
.Trained dealer technicians can inspect the
windshield and recommend proper
replacement if needed.
Wiper Blades
Wiper blades need to be cleaned and kept in
good condition to provide a clear view.
.Signs of wear include streaking, skipping
across the windshield, and worn or split
rubber.
.Trained dealer technicians can check the
wiper blades and replace them when
needed.

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
430 Index
TaillampsBulb Replacement . . . . . . . . . . . . . . . . . . . . . . 326
Task Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Teen Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187
Text Telephone (TTY) Users . . . . . . . . . . . . . . 403
Theft-Deterrent Systems . . . . . . . . . . . . . . . . . . 29 Immobilizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336 All-Season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
All-Terrain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 351
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 356
Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Full-Size Spare . . . . . . . . . . . . . . . . . . . . . . . . . 366
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 355
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Pressure Monitor Operation . . . . . . . . . . . 343
Pressure Monitor System . . . . . . . . . . . . . . 342
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 348
Sidewall Labeling . . . . . . . . . . . . . . . . . . . . . . 338
Terminology and Definitions . . . . . . . . . . . 339
Uniform Tire Quality Grading . . . . . . . . . . 352
Wheel Alignment and Tire Balance . . . . 354 Tires (cont'd)
Wheel Replacement . . . . . . . . . . . . . . . . . . . . 354
When It Is Time for New Tires . . . . . . . . . 350
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . . 235
Tow/Haul Mode Light . . . . . . . . . . . . . . . . . . . . 114
Towing Driving Characteristics . . . . . . . . . . . . . . . . . 268
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
General Information . . . . . . . . . . . . . . . . . . . 268
Recreational Vehicle . . . . . . . . . . . . . . . . . . . 370
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Trailer Sway Control (TSC) . . . . . . . . . . . . . 285
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Traction
Limited-Slip Differential . . . . . . . . . . . . . . . . 245
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Traction Control/Electronic Stability Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Trademarks and License Agreements . . . . . 190
Trailer
Sway Control (TSC) . . . . . . . . . . . . . . . . . . . . 285
Tow Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Trailer Towing
App . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 286
Trailering App . . . . . . . . . . . . . . . . . . . . . . . . . . . 286 Transfer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Transmission
Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Fluid, Automatic . . . . . . . . . . . . . . . . . . . . . . . 308
Transportation Program, Courtesy . . . . . . . 406
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Truck Bed Camera Rearview Mirror . . . . . . . .37
Truck-Camper Loading Information . . . . . . . 222
Turn and Lane-Change Signals . . . . . . . . . . . .138
Turn Signal Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 326
U
Underseat Storage . . . . . . . . . . . . . . . . . . . . . . . . 92
Uniform Tire Quality Grading . . . . . . . . . . . . 352
Universal Remote System . . . . . . . . . . . . . . . . . 131Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Updates Map Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Using the Navigation System . . . . . . . . . . . . .158
Using the System . . . . . . . . . . . . . . . . . . . . . . . . .147
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . .2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Chevrolet Silverado 2500 HD/3500 HD Owner Manual (GMNA-Localizing-U.
S./Canada/Mexico-14632154) - 2021 - CRC - 11/20/20
Index 431
Vehicle (cont'd)Canadian Owners . . . . . . . . . . . . . . . . . . . . . . . . . 1
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 208
Identification Number (VIN) . . . . . . . . . . . . 397
Load Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Personalization . . . . . . . . . . . . . . . . . . . . . . . . 126
Remote Start . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Speed Messages . . . . . . . . . . . . . . . . . . . . . . . 126
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Vehicle Ahead Indicator . . . . . . . . . . . . . . . . . . . 115
Vehicle Care
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Vehicle Data Recording and Privacy . . . . . . 410
Vehicle Positioning . . . . . . . . . . . . . . . . . . . . . . 169
Vehicle Security Steering Column Lock . . . . . . . . . . . . . . . . . . . 28
Ventilation, Air . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Voice Recognition . . . . . . . . . . . . . . . . . . . . . . . . 170
Voltmeter Gauge . . . . . . . . . . . . . . . . . . . . . . . . 109
W
Warning Brake System Light . . . . . . . . . . . . . . . . . . . . . 113
Caution and Danger . . . . . . . . . . . . . . . . . . . . . 2 Warning (cont'd)
Lane Departure (LDW) . . . . . . . . . . . . . . . . . 262
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Warnings Hazard Flashers . . . . . . . . . . . . . . . . . . . . . . . . . 137
Washer Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Wheels
Alignment and Tire Balance . . . . . . . . . . . . 354
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 352
Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 354
When It Is Time for New Tires . . . . . . . . . . . 350
Where to Put the Restraint . . . . . . . . . . . . . . . .73
Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Windshield Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
Wiper/Washer . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Winter
Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Winter Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Wiper Blade Replacement . . . . . . . . . . . . . . . . 322
Wireless Charging . . . . . . . . . . . . . . . . . . . . . . . . 99