2020 GMC Sierra Owner's Manual
Year:
2020
Make:
GMC
Model:
Sierra
Rating:
Table of Contents
Canadian Vehicle Owners
3
Using this Manual
3
Danger, Warning, and Caution
4
Symbols
4
Keys (Key Access)
10
Keys (Keyless Access)
13
Remote Keyless Entry (RKE) System
14
Remote Keyless Entry (RKE) System Operation (Key Access)
14
Remote Keyless Entry (RKE) System Operation (Keyless Access)
17
Remote Vehicle Start
26
Door Locks
27
Power Door Locks
28
Delayed Locking
28
Automatic Door Locks
28
Lockout Protection
29
Tailgate
30
Vehicle Alarm System
37
Steering Column Lock
38
Immobilizer
38
Convex Mirrors
40
Manual Mirrors
40
Trailer-Tow Mirrors
41
Power Mirrors
42
Folding Mirrors
43
Heated Mirrors
44
Automatic Dimming Mirror
44
Blind Spot Mirrors
44
Interior Rearview Mirrors
45
Manual Rearview Mirror
45
Automatic Dimming Rearview Mirror
45
Manual Windows
48
Power Windows
48
Rear Windows
50
Seat Adjustment
55
Center Seat
56
Power Seat Adjustment
56
Lumbar Adjustment
57
Reclining Seatbacks
57
Memory Seats
59
How to Wear Seat Belts Properly
66
Lap-Shoulder Belt
68
Seat Belt Use During Pregnancy
70
Seat Belt Extender
71
Safety System Check
71
Seat Belt Care
71
Where Are the Airbags?
74
When Should an Airbag Inflate?
76
What Makes an Airbag Inflate?
76
How Does an Airbag Restrain?
77
What Will You See after an Airbag Inflates?
77
Passenger Sensing System
78
Servicing the Airbag-Equipped Vehicle
83
Adding Equipment to the Airbag-Equipped Vehicle
83
Airbag System Check
84
Older Children
85
Infants and Young Children
87
Child Restraint Systems
89
Where to Put the Restraint
91
Lower Anchors and Tethers for Children (LATCH System)
92
Replacing LATCH System Parts After a Crash
105
Securing Child Restraints (With the Seat Belt in the Rear Seat)
105
Securing Child Restraints (In the Center Front Seat)
108
Glove Box
113
Cupholders
113
Underseat Storage
114
Rear Storage
114
Center Console Storage
114
Steering Wheel Adjustment
119
Steering Wheel Controls
120
Heated Steering Wheel
120
Horn
120
Windshield Wiper/Washer
120
Compass
121
Clock
121
Power Outlets
122
Instrument Cluster
127
Speedometer
131
Odometer
132
Trip Odometer
132
Tachometer
132
Fuel Gauge
132
Engine Oil Pressure Gauge
133
Engine Coolant Temperature Gauge
134
Voltmeter Gauge
135
Seat Belt Reminders
136
Airbag Readiness Light
136
Passenger Airbag Status Indicator
137
Charging System Light
138
Malfunction Indicator Lamp (Check Engine Light)
138
Brake System Warning Light
140
Electric Parking Brake Light
141
Service Electric Parking Brake Light
141
Antilock Brake System (ABS) Warning Light
141
Four-Wheel-Drive Light
142
Tow/Haul Mode Light
142
Hill Descent Control Light
142
Lane Departure Warning (LDW) Light (2500/3500 Series)
142
Lane Keep Assist (LKA) Light (1500 Series)
143
Vehicle Ahead Indicator
143
Pedestrian Ahead Indicator
143
Traction Off Light
143
Traction Control System (TCS)/Electronic Stability Control Light
144
Electronic Stability Control (ESC) Off Light
144
Engine Coolant Temperature Warning Light
145
Driver Mode Control Light
145
Tire Pressure Light
145
Engine Oil Pressure Light (Uplevel Cluster)
146
Low Fuel Warning Light
146
Security Light
147
High-Beam On Light
147
Front Fog Lamp Light
147
Lamps On Reminder
147
Cruise Control Light
147
Driver Information Center (DIC) (Base Level)
148
Driver Information Center (DIC) (Midlevel and Uplevel)
149
Engine Power Messages
156
Vehicle Speed Messages
157
Universal Remote System Programming
162
Exterior Lamp Controls
166
Exterior Lamps Off Reminder
168
Headlamp High/Low-Beam Changer
168
Flash-to-Pass
169
Daytime Running Lamps (DRL)
169
Automatic Headlamp System
169
Hazard Warning Flashers
170
Turn and Lane-Change Signals
171
Fog Lamps
171
Task Lighting
172
Instrument Panel Illumination Control
173
Dome Lamps
173
Entry Lighting
174
Exit Lighting
174
Battery Load Management
175
Battery Power Protection
175
Dual Automatic Climate Control System
180
Passenger Compartment Air Filter
184
Driving for Better Fuel Economy
187
Distracted Driving
188
Defensive Driving
188
Drunk Driving
189
Control of a Vehicle
189
Braking
189
Steering
189
Off-Road Recovery
191
Loss of Control
191
Off-Road Driving
192
Driving on Wet Roads
197
Hill and Mountain Roads
198
Winter Driving
198
If the Vehicle Is Stuck
200
Vehicle Load Limits
201
New Vehicle Break-In
209
Ignition Positions (Keyless Access)
209
Ignition Positions (Key Access)
211
Starting the Engine
213
Stop/Start System
214
Engine Heater
216
Retained Accessory Power (RAP)
217
Shifting Into Park
218
Shifting out of Park
219
Parking over Things That Burn
220
Active Fuel Management
220
Manual Mode
225
Electric Brake Boost
233
Antilock Brake System (ABS)
233
Electric Parking Brake
234
Brake Assist
235
Traction Control/Electronic Stability Control
236
Hill Descent Control (HDC)
238
Driver Mode Control
239
Limited-Slip Differential
243
Assistance Systems for Parking or Backing
258
Assistance Systems for Driving
269
Forward Collision Alert (FCA) System
269
Automatic Emergency Braking (AEB)
271
Front Pedestrian Braking (FPB) System (1500 Series)
273
Side Blind Zone Alert (SBZA)
275
Lane Change Alert (LCA)
275
Lane Departure Warning (LDW) (2500/3500 Series)
277
Top Tier Fuel
281
Recommended Fuel (Except 6.2L V8 Engine)
281
Recommended Fuel (6.2L V8 Engine)
282
Prohibited Fuels
282
Fuels in Foreign Countries
282
Fuel Additives
283
E85 or FlexFuel
283
Filling the Tank (Pickup Model)
284
Filling the Tank (Chassis Cab Model)
286
General Towing Information
288
Driving Characteristics and Towing Tips
288
Towing Equipment
297
Trailer Sway Control (TSC)
309
Add-On Electrical Equipment
323
Adding a Snow Plow or Similar Equipment
324
California Proposition 65 Warning
330
California Perchlorate Materials Requirements
330
Doing Your Own Service Work
331
Hood
331
Engine Compartment Overview
333
Engine Oil
340
Engine Oil Life System
342
Automatic Transmission Fluid
344
Engine Air Filter Life System
344
Engine Air Cleaner/Filter
345
Cooling System
347
Engine Overheating
352
Overheated Engine Protection Operating Mode
353
Engine Fan
354
Power Steering Fluid
355
Washer Fluid
355
Brakes
356
Brake Pad Life System
357
Brake Fluid
358
Battery - North America
359
Four-Wheel Drive
362
Front Axle
362
Rear Axle
363
Noise Control System
363
Starter Switch Check
364
Automatic Transmission Shift Lock Control Function Check
364
Ignition Transmission Lock Check
364
Park Brake and P (Park) Mechanism Check
365
Wiper Blade Replacement
365
Windshield Replacement
366
Halogen Bulbs
368
LED Lighting
368
Headlamps, Front Turn Signal, Sidemarker, and Parking Lamps
368
Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps
369
Center High-Mounted Stoplamp (CHMSL) and Cargo Lamp
370
Electrical System Overload
371
Fuses and Circuit Breakers
371
Engine Compartment Fuse Block
372
Instrument Panel Fuse Block (Left)
375
Tires
380
All-Season Tires
380
Winter Tires
381
Low-Profile Tires
381
All-Terrain Tires
382
Tire Sidewall Labeling
382
Tire Designations
384
Tire Terminology and Definitions
386
Tire Pressure
388
Tire Pressure for High-Speed Operation
390
Tire Pressure Monitor System
390
Tire Pressure Monitor Operation
391
Tire Inspection
397
Tire Rotation
397
When It Is Time for New Tires
400
Buying New Tires
400
Different Size Tires and Wheels
402
Uniform Tire Quality Grading
403
Wheel Alignment and Tire Balance
404
Wheel Replacement
404
Tire Chains
405
If a Tire Goes Flat
406
Tire Changing
408
Exterior Care
430
Interior Care
436
General Information
440
Maintenance Schedule
442
Special Application Services
449
Recommended Fluids and Lubricants
453
Maintenance Replacement Parts
455
Vehicle Identification Number (VIN)
458
Capacities and Specifications
459
Customer Satisfaction Procedure
463
Customer Assistance Offices
465
Customer Assistance for Text Telephone (TTY) Users
466
Online Owner Center
466
GM Mobility Reimbursement Program
466
Roadside Assistance Program
467
Scheduling Service Appointments
468
Courtesy Transportation Program
469
Collision Damage Repair
470
Publication Ordering Information
472
Reporting Safety Defects to the United States Government
473
Reporting Safety Defects to the Canadian Government
473
Cybersecurity
475
Event Data Recorders
475
OnStar
476
Emergency
478
Security
479
Navigation
485
Connections
486
Index_A
488
Index_B
489
Index_C
489
Index_D
490
Index_E
491
Index_F
492
Index_G
492
Index_H
493
Index_I
493
Index_J
493
Index_K
493
Index_L
493
Index_M
494
Index_N
495
Index_O
495
Index_P
495
Index_R
496
Index_S
497
Index_T
498
Index_U
499
Index_V
499
Index_W
499
2020 GMC Sierra Overview
Introduction
The 2020 GMC Sierra is not just another pickup truck; it's a bold statement of power, capability, and luxury. Engineered for both work and play, the Sierra blends rugged utility with refined design. With advanced technology and a spacious interior, this truck is tailored for those who require both versatility and comfort in their driving experience.
Powertrains
The 2020 GMC Sierra offers a range of powertrains to suit various driving preferences. The base model comes equipped with a 4.3-liter V6 engine delivering 285 horsepower, making it a dependable choice for everyday tasks. For those seeking more power, the 5.3-liter V8 engine produces 355 horsepower, while the available 6.2-liter V8 packs an impressive 420 horsepower. The Sierra also features an innovative diesel option, a 3.0-liter Duramax inline-six turbo diesel engine that balances robust torque with excellent fuel economy, providing an optimal blend of power and efficiency.
Trims
The 2020 GMC Sierra is offered in several well-appointed trims, including the base Sierra, the luxurious SLT, and the top-of-the-line Denali. Each trim level comes with its own set of features and options, allowing buyers to customize their experience. The SLT enhances comfort with leather upholstery and advanced infotainment systems, while the Denali showcases a premium cabin with cutting-edge technology and distinctive exterior styling.
Features
Owner's Manual
The owner’s manual for the 2020 GMC Sierra provides essential information on operation, maintenance, and safety. It includes detailed instructions on vehicle features, navigating the infotainment system, and troubleshooting common issues. This comprehensive resource ensures owners can maximize their truck’s performance and longevity while enjoying a seamless driving experience.
User manual download
The GMC Sierra owner manual for the 2020 model year is to be found in PDF downloadable format on this page. The owner manual for the model year 2020 is free and in English, but the repair manuals are usually not easy to get and may cost more.
Posted by, John Mana
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