electrical CHEVROLET SILVERADO 2020 Service Manual

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
476 OnStar
Languages
The vehicle can be programmed to
respond in multiple languages.
Press
Qand ask for an Advisor.
Advisors are available in English,
Spanish, and French. Available
languages may vary by country.
Potential Issues
OnStar cannot perform Remote
Door Unlock or Stolen Vehicle
Assistance after the vehicle has
been off continuously for 10 days
without an ignition cycle. If the
vehicle has not been started for
10 days, OnStar can contact
Roadside Assistance or a locksmith
to help gain access to the vehicle.
Global Positioning
System (GPS)
. Obstruction of the GPS can
occur in a large city with tall
buildings; in parking garages;
around airports; in tunnels and
underpasses; or in an area with
very dense trees. If GPS signals
are not available, the OnStar
system should still operate to call OnStar. However, OnStar
could have difficulty identifying
the exact location.
. In emergency situations, OnStar
can use the last stored GPS
location to send to emergency
responders.
A temporary loss of GPS can cause
loss of the ability to send a
Turn-by-Turn Navigation route. The
Advisor may give a verbal route or
may ask for a call back after the
vehicle is driven into an open area.
Cellular and GPS Antennas
Cellular reception is required for
OnStar to send remote signals to
the vehicle. Do not place items over
or near the antenna to prevent
blocking cellular and GPS signal
reception.
Unable to Connect to OnStar
Message
If there is limited cellular coverage
or the cellular network has reached
maximum capacity, this message
may come on. Press
Qto try the
call again or try again after driving a
few miles into another cellular area.
Vehicle and Power Issues
OnStar services require a vehicle
electrical system, wireless service,
and GPS satellite technologies to be
available and operating for features
to function properly. These systems
may not operate if the battery is
discharged or disconnected.
Add-on Electrical Equipment
The OnStar system is integrated
into the electrical architecture of the
vehicle. Do not add any electrical
equipment. See Add-On Electrical
Equipment 0318. Added electrical
equipment may interfere with the
operation of the OnStar system and
cause it to not operate.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
Index 481
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 325
Accessory Power . . . . . . . . . . . . . . . 213
Active Fuel Management . . . . . . . 215
Adaptive Cruise Control . . . . . . . . 242
Add-On Electrical Equipment . . . 318
Adding a Snow Plow or Similar Equipment . . . . . . . . . . . . . 319
Additional Information
OnStar . . . . . . . . . . . . . . . . . . . . . . . 474
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . 445
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . 54
Air Cleaner/Filter, Engine . . . . . . . 340
Air Conditioning . . . . . . . . . . . 174, 176
Air Filter Life System . . . . . . . . . . . . . . . . . . . 339
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 180
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 179
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 81
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 74
Passenger Sensing System . . . . 75 Airbag System (cont'd)
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 73
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . . . 74
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 73
Where Are the Airbags? . . . . . . . . 71
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 80
Passenger Status Indicator . . . 133
Readiness Light . . . . . . . . . . . . . . 133
Servicing Airbag-Equipped
Vehicles . . . . . . . . . . . . . . . . . . . . . . . 80
System Check . . . . . . . . . . . . . . . . . . 69
Alarm Vehicle Security . . . . . . . . . . . . . . . . 34
Alert Lane Change . . . . . . . . . . . . . . . . . 270
Side Blind Zone (SBZA) . . . . . . 270
All-Season Tires . . . . . . . . . . . . . . . . 375
All-Terrain Tires . . . . . . . . . . . . . . . . . 377
Antilock Brake System (ABS) . . . 228 Warning Light . . . . . . . . . . . . . . . . . 138

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13337620) - 2020 - CTC - 1/27/20
484 Index
Data CollectionInfotainment System . . . . . . . . . . 471
OnStar . . . . . . . . . . . . . . . . . . . . . . . 471
Data Recorders, Event . . . . . . . . . 470
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 165
Defensive Driving . . . . . . . . . . . . . . . 184
Delayed Locking . . . . . . . . . . . . . . . . . 27
Diagnostics
Connected Services . . . . . . . . . . 480
Differential, Limited-Slip . . . . . . . . 239
Distracted Driving . . . . . . . . . . . . . . . 184
Dome Lamps . . . . . . . . . . . . . . . . . . . 170
Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . 144
Delayed Locking . . . . . . . . . . . . . . . . 27
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Locks . . . . . . . . . . . . . . . . . . . . 27
Drive Belt Routing, Engine . . . . . . 457
Driver Assistance Systems . . . . . 252
Driver Information Center (DIC) . . . . . . . . . . . . . 145, 146
Driver Mode Control . . . . . . . . . . . . 234
Driver Mode Control Light . . . . . . 142
Driving Assistance Systems . . . . . . . . . . 264
Better Fuel Economy . . . . . . . . . 183 Driving (cont'd)
Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 283
Defensive . . . . . . . . . . . . . . . . . . . . . 184
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 185
Hill and Mountain Roads . . . . . . 194
If the Vehicle is Stuck . . . . . . . . . 196
Loss of Control . . . . . . . . . . . . . . . 187
Off-Road . . . . . . . . . . . . . . . . . . . . . 188
Off-Road Recovery . . . . . . . . . . . 187
Vehicle Load Limits . . . . . . . . . . . 197
Wet Roads . . . . . . . . . . . . . . . . . . . 193
Winter . . . . . . . . . . . . . . . . . . . . . . . . 194
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 176
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 278
Electric Brake Boost . . . . . . . . . . . . 228
Electric Parking Brake . . . . . . . . . . 229
Electric Parking Brake Light . . . . 137
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 318
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 367
Fuses and Circuit Breakers . . . 366 Electrical System (cont'd)
Instrument Panel Fuse
Block . . . . . . . . . . . . . . . . . . . 370, 372
Overload . . . . . . . . . . . . . . . . . . . . . 366
Electronic Stability Control (ESC) Off Light . . . . . . . . . . . . . . . . 141
Emergency
OnStar . . . . . . . . . . . . . . . . . . . . . . . 473
Engine Air Cleaner/Filter . . . . . . . . . . . . . 340
Check Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 135
Compartment Overview . . . . . . . 328
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 131
Coolant Temperature
Warning Light . . . . . . . . . . . . . . . 141
Cooling System . . . . . . . . . . . . . . . 342
Drive Belt Routing . . . . . . . . . . . . 457
Exhaust . . . . . . . . . . . . . . . . . . . . . . 216
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
Heater . . . . . . . . . . . . . . . . . . . . . . . . .211
Oil Life System . . . . . . . . . . . . . . . 337
Oil Pressure Gauge . . . . . . . . . . 130
Oil Pressure Light . . . . . . . . . . . . 143
Overheated Protection Operating Mode . . . . . . . . . . . . . 348
Overheating . . . . . . . . . . . . . . . . . . 347