2020 GMC SIERRA DENALI battery replacement

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
360 Vehicle Care
For vehicles equipped with the Stop/
Start system:
1. Loosen and remove thenegative battery cable nut (1)
at the battery sensor
connection.
2. Remove the negative battery cable (2) from the battery
sensor stud.
3. Cover the negative battery cable terminal, battery sensor
stud, and negative battery post
with a non-conductive material
to prevent any contact with the
negative battery cable. For vehicles not equipped with the
Stop/Start system:1. Loosen the negative battery
cable nut (1).
2. Remove the negative battery cable clamp (2) from the
negative battery post.
3. Cover the negative battery cable clamp, and negative
battery post with a
non-conductive material to
prevent any contact with the
negative battery cable.
Negative Battery Cable
Reconnection
Caution
When reconnecting the battery:. Use the original nut from the
vehicle to secure the
negative battery cable. Do
not use a different nut.
If you need a replacement
nut, see your dealer.
. Tighten the nut with a hand
tool. Do not use an impact
wrench or power tools to
tighten the nut.
The vehicle could be damaged if
these guidelines are not followed.
Caution
Do not use paints, lubricants,
or corrosion inhibitors on the nut
that secures the negative battery
cable to the vehicle. This could
damage the vehicle.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
Service and Maintenance 449
Additional
Maintenance and Care
Your vehicle is an important
investment and caring for it properly
may help to avoid future costly
repairs. To maintain vehicle
performance, additional
maintenance services may be
required.
It is recommended that your dealer
perform these services—their
trained dealer technicians know
your vehicle best. Your dealer can
also perform a thorough
assessment with a multi-point
inspection to recommend when your
vehicle may need attention.
The following list is intended to
explain the services and conditions
to look for that may indicate
services are required.
Battery
The 12-volt battery supplies power
to start the engine and operate any
additional electrical accessories. .
To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of
cracking or splitting.
. Trained dealer technicians have
access to tools and equipment
to inspect the belts and
recommend adjustment or
replacement when necessary.
Brakes
Brakes stop the vehicle and are
crucial to safe driving.
. Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping. .
Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants 0452 for GM approved
fluids.
. Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi-point inspection, your
dealer can inspect the hoses and
advise if replacement is needed.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-13337776) - 2020 - CRC - 8/27/19
Customer Information 467
responsibility for the repair or
replacement of the tire if it is not
covered by the warranty.
. Battery Jump Start: Service to
jump start a dead battery.
. Trip Interruption Benefits and
Assistance: If your trip is
interrupted due to a warranty
event, incidental expenses may
be reimbursed within the
Powertrain warranty period.
Items considered are reasonable
and customary hotel, meals,
rental car, or a vehicle being
delivered back to the customer,
up to 500 miles.
Services Not Included in
Roadside Assistance
. Impound towing caused by
violation of any laws
. Legal fines
. Mounting, dismounting,
or changing of snow tires,
chains, or other traction devices
Service is not provided if a vehicle
is in an area that is not accessible
to the service vehicle or is not a regularly traveled or maintained
public road, which includes ice and
winter roads. Off-road use is not
covered.
Services Specific to
Canadian-Purchased Vehicles
.
Fuel Delivery: Reimbursement
is up to 7 L. Diesel fuel delivery
may be restricted. Propane and
other fuels are not provided
through this service.
. Lock-Out Service: Vehicle
registration is required.
. Trip Interruption Benefits and
Assistance: Must be over
150 km from where your trip was
started to qualify.
Pre-authorization, original
detailed receipts, and a copy of
the repair orders are required.
Once authorization has been
received, the Roadside
Assistance advisor will help to
make arrangements and explain
how to receive payment.
. Alternative Service: If
assistance cannot be provided
right away, the Roadside Assistance advisor may give
permission to get local
emergency road service. You will
receive payment, up to $100,
after sending the original receipt
to Roadside Assistance.
Mechanical failures may be
covered, however any cost for
parts and labor for repairs not
covered by the warranty are the
owner
’s responsibility.
Scheduling Service
Appointments
When the vehicle requires warranty
service, contact your dealer and
request an appointment. By
scheduling a service appointment
and advising the service consultant
of your transportation needs, your
dealer can help minimize your
inconvenience.
If the vehicle cannot be scheduled
into the service department
immediately, keep driving it until it
can be scheduled for service,
unless, of course, the problem is

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13337776) - 2020 - CRC - 8/27/19
488 Index
Assistance Program,Roadside . . . . . . . . . . . . . . . . . . . . . . 466
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . . 268
Assistance Systems for Parking and Backing . . . . . . . . . . 257
Auto Stop
Stop/Start System . . . . . . . . . . . . 213
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . 43
Door Locks . . . . . . . . . . . . . . . . . . . . . 27
Emergency Braking (AEB) . . . . 270
Headlamp System . . . . . . . . . . . . 168
Transmission . . . . . . . . . . . . . . . . . 221
Transmission Fluid . . . . . . . . . . . 343
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . . . 224
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . 363
Axle, Front . . . . . . . . . . . . . . . . . . . . . . 361
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 362
B
Battery Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . 174
Load Management . . . . . . . . . . . . 174 Battery (cont'd)
Power Protection . . . . . . . . . . . . . 174
Battery - North America . . . . 358, 419
Blade Replacement, Wiper . . . . . 364
Blind Spot Mirrors . . . . . . . . . . . . . . . 43
Brake Electric Boost . . . . . . . . . . . . . . . . . 232
Parking, Electric . . . . . . . . . . . . . . 233
System Warning Light . . . . . . . . 139
Brake Pad Life System . . . . . . . . . 356
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 355 Antilock . . . . . . . . . . . . . . . . . . . . . . . 232
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 234
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 357
Pad Life System . . . . . . . . . . . . . . 356
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 188 AutomaticEmergency (AEB) . . . . . . . . . . . 270
Braking System Front Pedestrian (FPB) . . . . . . . 272
Break-In, New Vehicle . . . . . . . . . . 208
Bulb Replacement Center High-Mounted
Stoplamp (CHMSL) and
Cargo Lamp . . . . . . . . . . . . . . . . . 369
Halogen Bulbs . . . . . . . . . . . . . . . . 367
Headlamp Aiming . . . . . . . . . . . . . 366
Headlamps . . . . . . . . . . . . . . . . . . . 367 Bulb Replacement (cont'd)
Headlamps, Front Turn
Signal, Sidemarker, and
Parking Lamps . . . . . . . . . . . . . . 367
License Plate Lamps . . . . . . . . . 369
Taillamps, Turn Signal, Stoplamps, and Back-up
Lamps . . . . . . . . . . . . . . . . . . . . . . 368
Buying New Tires . . . . . . . . . . . . . . . 399
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 120
California Perchlorate Materials
Requirements . . . . . . . . . . . . . . . 329
California Proposition
65 Warning . . . . . . . . . .329, 358, 419, Back Cover
Canadian Vehicle Owners . . . . . . . . 2
Capacities and Specifications . . . . . . . . . . . . . . . . . 458
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 220
Tailgate . . . . . . . . . . . . . . . . . . . . . . . . . 29
Winter Driving . . . . . . . . . . . . . . . . 197
Cargo Tie-Downs . . . . . . . . . . . . . . . . . . . . .115

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13337776) - 2020 - CRC - 8/27/19
492 Index
Glove Box . . . . . . . . . . . . . . . . . . . . . . 112
GM Mobility ReimbursementProgram . . . . . . . . . . . . . . . . . . . . . . . 465
H
Halogen Bulbs . . . . . . . . . . . . . . . . . . 367
Hazard Warning Flashers . . . . . . . 169
Head Restraints . . . . . . . . . . . . . . . . . 53
Head-up Display . . . . . . . . . . . . . . . . 152
HeadlampsAiming . . . . . . . . . . . . . . . . . . . . . . . . 366
Automatic . . . . . . . . . . . . . . . . . . . . . 168
Bulb Replacement . . . . . . . . . . . . 367
Daytime RunningLamps (DRL) . . . . . . . . . . . . . . . . 168
Flash-to-Pass . . . . . . . . . . . . . . . . . 168
Headlamps, Front Turn Signal, Sidemarker, and
Parking Lamps . . . . . . . . . . . . . . 367
High-Beam On Light . . . . . . . . . . 146
High/Low Beam Changer . . . . . 167
Lamps On Reminder . . . . . . . . . 146
Heated Rear Seats . . . . . . . . . . . . . . . . . . . . . 63
Steering Wheel . . . . . . . . . . . . . . . .119
Heated and Ventilated Front
Seats . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Heated Mirrors . . . . . . . . . . . . . . . . . . . 43 Heater
Engine . . . . . . . . . . . . . . . . . . . . . . . . 215
Heating . . . . . . . . . . . . . . . . . . . . 177, 179
High-Beam On Light . . . . . . . . . . . . 146
High-Speed Operation . . . . . . . . . . 389
Hill and Mountain Roads . . . . . . . . 197
Hill Descent Control (HDC) . . . . . 237
Hill Descent Control Light . . . . . . . 141
Hill Start Assist (HSA) . . . . . . . . . . 235
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Horn . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . . . 65
HVAC . . . . . . . . . . . . . . . . . . . . . . 177, 179
I
Ignition Positions . . . . . . . . . . 208, 210
Ignition Transmission Lock Check . . . . . . . . . . . . . . . . . . . . . . . . . 363
Immobilizer . . . . . . . . . . . . . . . . . . . . . . 37
Indicator Pedestrian Ahead . . . . . . . . . . . . 142
Vehicle Ahead . . . . . . . . . . . . . . . . 142
Infants and Young Children, Restraints . . . . . . . . . . . . . . . . . . . . . . 86
Information
Publication Ordering . . . . . . . . . . 471
Infotainment . . . . . . . . . . . . . . . . . . . . 176 Infotainment System . . . . . . . . . . . . 475
Instrument Cluster . . . . . . . . . . . . . . 126
Instrument Panel Overview . . . . . . . 5
Interior Rearview Mirrors . . . . . . . . . 44
Introduction . . . . . . . . . . . . . . . . . . . . . . . 2
J
Jump Starting - North
America . . . . . . . . . . . . . . . . . . . . . . . 419
K
Keyless EntryRemote (RKE) System . . . . . 13, 16
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . .9, 12
L
Labeling, Tire Sidewall . . . . . . . . . . 381
Lamps Daytime Running (DRL) . . . . . . 168
Dome . . . . . . . . . . . . . . . . . . . . . . . . . 172
Exterior Cargo . . . . . . . . . . . . . . . . 171
Exterior Controls . . . . . . . . . . . . . . 165
Exterior Lamps OffReminder . . . . . . . . . . . . . . . . . . . 167
Exterior Lighting Battery Saver . . . . . . . . . . . . . . . . . . . . . . . 174
License Plate . . . . . . . . . . . . . . . . . 369
Malfunction Indicator (Check Engine) . . . . . . . . . . . . . 137

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-13337776) - 2020 - CRC - 8/27/19
Index 495
Passenger Compartment AirFilter . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Passenger Sensing System . . . . . 77
Pedestrian Ahead Indicator . . . . . 142
Perchlorate Materials Requirements, California . . . . . . 329
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 156
Pickup Conversion to Chassis Cab . . . . . . . . . . . . . . . . . . 326
Power
Door Locks . . . . . . . . . . . . . . . . . . . . . 27
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Outlets . . . . . . . . . . . . . . . . . . . . . . . 121
Protection, Battery . . . . . . . . . . . . 174
Retained Accessory (RAP) . . . 216
Seat Adjustment . . . . . . . . . . . . . . . . 55
Steering Fluid . . . . . . . . . . . . . . . . . 354
Windows . . . . . . . . . . . . . . . . . . . . . . . 47
Power Assist Steps . . . . . . . . . . . . . . 34
Pregnancy, Using Seat Belts . . . . 69
Privacy Vehicle Data Recording . . . . . . . 473
Program Courtesy Transportation . . . . . . 468
Prohibited Fuels . . . . . . . . . . . . . . . . 281 Proposition
65 Warning,
California . . . . . . . . . . . .329, 358, 419,
Back Cover
Publication Ordering Information . . . . . . . . . . . . . . . . . . . . 471
R
Radio Frequency Statement . . . . 472
Reading Lamps . . . . . . . . . . . . . . . . . 173
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 362Locking . . . . . . . . . . . . . . . . . . . . . . . 242
Rear Camera Mirror . . . . . . . . . . . . . 45
Rear Seats . . . . . . . . . . . . . . . . . . . . . . 62 Heated . . . . . . . . . . . . . . . . . . . . . . . . . 63
Rear Storage . . . . . . . . . . . . . . . . . . . 113
Rear Vision Camera (RVC) . . . . . 257
Rear Windows . . . . . . . . . . . . . . . . . . . 49
Rearview Mirrors . . . . . . . . . . . . . . . . 44 Automatic Dimming . . . . . . . . . . . . . 44
Reclining Seatbacks . . . . . . . . . . . . . 56
Recommended
Fuel . . . . . . . . . . . . . . . . . . . . . 280, 281
Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . 452
Records
Maintenance . . . . . . . . . . . . . . . . . . 456 Recreational Vehicle Towing . . . . 424
Reimbursement Program,
GM Mobility . . . . . . . . . . . . . . . . . . . 465
Remote Keyless Entry (RKE) System . . . . . . . . . . . . . . 13, 16
Remote Vehicle Start . . . . . . . . . . . . 25
Replacement Parts Airbags . . . . . . . . . . . . . . . . . . . . . . . . . 83
Maintenance . . . . . . . . . . . . . . . . . . 454
Replacing Airbag System . . . . . . . . 83
Replacing LATCH System Parts after a Crash . . . . . . . . . . . . 104
Replacing Seat Belt System Parts after a Crash . . . . . . . . . . . . . 71
Reporting Safety Defects Canadian Government . . . . . . . . 472
General Motors . . . . . . . . . . . . . . . 473
U.S. Government . . . . . . . . . . . . . 472
Restraints Where to Put . . . . . . . . . . . . . . . . . . . 90
Retained Accessory
Power (RAP) . . . . . . . . . . . . . . . . . . 216
Reverse Tilt Mirrors . . . . . . . . . . . . . . 44
Ride Control Systems Enhanced Traction
System (ETS) . . . . . . . . . . . . . . . 242