2021 GMC ACADIA side mirror

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-14608671) - 2021 - CRC - 10/26/20
252 Driving and Operating
Radio Frequency Information
SeeRadio Frequency Statement 0371.
Lane Keep Assist (LKA)
If equipped, LKA may help avoid crashes due
to unintentional lane departures. This
system uses a camera to detect lane
markings between 60 km/h (37 mph) and
180 km/h (112 mph). It may assist by gently
turning the steering wheel if the vehicle
approaches a detected lane marking. It may
also provide a Lane Departure Warning
(LDW) alert if the vehicle crosses a detected
lane marking. LKA can be overridden by
turning the steering wheel. This system is
not intended to keep the vehicle centered in
the lane. LKA will not assist and alert if the
turn signal is active in the direction of lane
departure, or if it detects that you are
accelerating, braking or actively steering.
{Warning
The LKA system does not continuously
steer the vehicle. It may not keep the
vehicle in the lane or give a Lane
Departure Warning (LDW) alert, even if a
lane marking is detected.
(Continued)
Warning (Continued)
The LKA and LDW systems may not:
.Provide an alert or enough steering
assist to avoid a lane departure or
crash.
.Detect lane markings under poor
weather or visibility conditions. This
can occur if the windshield or
headlamps are blocked by dirt, snow,
or ice; if they are not in proper
condition; or if the sun shines directly
into the camera.
.Detect road edges.
.Detect lanes on winding or hilly roads.
If LKA only detects lane markings on one
side of the road, it will only assist or
provide an LDW alert when approaching
the lane on the side where it has
detected a lane marking. Even with LKA
and LDW, you must steer the vehicle.
Always keep your attention on the road
and maintain proper vehicle position
within the lane, or vehicle damage,
injury, or death could occur. Always keep
the windshield, headlamps, and camera (Continued)
Warning (Continued)
sensors clean and in good repair. Do not
use LKA in bad weather conditions or on
roads with unclear lane markings, such as
construction zones.
{Warning
Using LKA while towing a trailer or on
slippery roads could cause loss of control
of the vehicle and a crash. Turn the
system off.
How the System Works
LKA uses a camera sensor installed on the
windshield ahead of the rearview mirror to
detect lane markings. It may provide brief
steering assist if it detects an unintended
lane departure. It may further provide an
audible alert that a lane marking has been
crossed.
To turn LKA on and off, press
Aon the
center console. If equipped, the indicator
light on the button comes on when LKA is
on and turns off when LKA is disabled.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-14608671) - 2021 - CRC - 10/26/20
Driving and Operating 253
Ais green if LKA is ready to assist. LKA
may assist by gently turning the steering
wheel if the vehicle approaches a detected
lane marking.
Ais amber when
assisting. It may also provide a Lane
Departure Warning (LDW) alert by flashing
Aamber if the vehicle crosses a
detected lane marking. Additionally, there
may be three beeps on the right or left,
depending on the lane departure direction.
Take Steering
The LKA system does not continuously steer
the vehicle. If LKA does not detect active
driver steering, an alert and chime may be
provided. Steer the vehicle to dismiss. LKA
may become temporarily unavailable after
repeated take steering alerts.
When the System Does Not Seem to
Work Properly
The system performance may be
affected by:
.Close vehicles ahead.
.Sudden lighting changes, such as when
driving through tunnels.
.Banked roads.
.Roads with poor lane markings, such as
two-lane roads. If the LKA system is not functioning
properly when lane markings are clearly
visible, cleaning the windshield may help.
A camera blocked message may display if
the camera is blocked. Some driver
assistance systems may have reduced
performance or not work at all. An LKA or
LDW unavailable message may display if the
systems are temporarily unavailable. This
message could be due to a blocked camera.
The LKA system does not need service. Clean
the outside of the windshield behind the
rearview mirror.
LKA assistance and/or LDW alerts may occur
due to tar marks, shadows, cracks in the
road, temporary or construction lane
markings, or other road imperfections. This
is normal system operation; the vehicle does
not need service. Turn LKA off if these
conditions continue.
Fuel
Top Tier Fuel
GM recommends the use of TOP TIER
Detergent Gasoline to keep the engine clean,
reduce engine deposits, and maintain
optimal vehicle performance. Look for the
TOP TIER Logo or see www.toptiergas.com
for a list of TOP TIER Detergent Gasoline
marketers and applicable countries.
Recommended Fuel
Use regular unleaded gasoline meeting
ASTM specification D4814 with a posted
octane rating of 87
—(R+M)/2 —or higher.
Do not use gasoline with a posted octane
rating of less than 87, as this may cause
engine knock and will lower fuel economy.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-14608671) - 2021 - CRC - 10/26/20
Driving and Operating 257
When towing a trailer:
.Become familiar with and follow all state
and local laws that apply to trailer
towing. These requirements vary from
state to state.
.State laws may require the use of
extended side view mirrors. Even if not
required, you should install extended side
view mirrors if your visibility is limited or
restricted while towing.
.Do not tow a trailer during the first
800 km (500 mi) of vehicle use to prevent
damage to the engine, axle, or other
parts.
.It is recommended to perform the first oil
change before heavy towing.
.During the first 800 km (500 mi) of trailer
towing, do not drive over 80 km/h
(50 mph) and do not make starts at full
throttle.
.Vehicles can tow in D (Drive). Tow/Haul
Mode is recommended for heavier trailers.
SeeTow/Haul Mode 0224. If the
transmission downshifts too often, a
lower gear may be selected using Manual
Mode. See Manual Mode 0223. If equipped, the following driver assistance
features should be turned off when towing
a trailer:
.Adaptive Cruise Control (ACC)
.Super Cruise Control
.Lane Keep Assist (LKA)
.Park Assist
.Automatic Parking Assist (APA)
.Reverse Automatic Braking (RAB)
If equipped, the following driver assistance
features should be turned to alert or off
when towing a trailer:
.Automatic Emergency Braking (AEB)
.Intelligent Brake Assist (IBA)
.Front Pedestrian Braking (FPB)
If equipped with Lane Change Alert (LCA),
the LCA detection zones that extend back
from the side of the vehicle do not move
further back when a trailer is towed. Use
caution while changing lanes when towing a
trailer.
If equipped with Rear Cross Traffic Alert
(RCTA), use caution while backing up when
towing a trailer, as the RCTA detection zones
that extend out from the back of the vehicle
do not move further back when a trailer is
towed.
{Warning
To prevent serious injury or death from
carbon monoxide (CO), when towing a
trailer:
.Do not drive with the liftgate, trunk/
hatch, or rear-most window open.
.Fully open the air outlets on or under
the instrument panel.
.Adjust the climate control system to a
setting that brings in only outside air.
See “Climate Control Systems” in the
Index.
For more information about carbon
monoxide, see Engine Exhaust 0219.
Towing a trailer requires experience. The
combination of the vehicle and trailer is
longer and not as responsive as the vehicle
itself. Get used to the handling and braking
of the combination by driving on a level
road surface before driving on public roads.
The trailer structure, the tires, and the
brakes must be all be rated to carry the
intended cargo. Inadequate trailer
equipment can cause the combination to
operate in an unexpected or unsafe manner.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-14608671) - 2021 - CRC - 10/26/20
388 Index
Infants and Young Children, Restraints . . . . 66
InformationPublication Ordering . . . . . . . . . . . . . . . . . . . . 371
Infotainment System . . . . . . . . . . . . . . . . . . . . 374
Instrument Cluster . . . . . . . . . . . . . . . . . . . 97, 100
Instrument Panel Overview . . . . . . . . . . . . . . . . 4
Interior Rearview Mirrors . . . . . . . . . . . . . . . . . 28
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 1, 138
J
Jump Starting - North America . . . . . . . . . . . 332
K
Keyless Entry Remote (RKE) System . . . . . . . . . . . . . . . . . . . . 7
Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
L
Labeling, Tire Sidewall . . . . . . . . . . . . . . . . . . . 302
Lamps Courtesy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Daytime Running (DRL) . . . . . . . . . . . . . . . . 133
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Exterior Controls . . . . . . . . . . . . . . . . . . . . . . . . 131
Exterior Lamps Off Reminder . . . . . . . . . . 132
Exterior Lighting Battery Saver . . . . . . . . . 137
Malfunction Indicator (CheckEngine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 Lamps (cont'd)
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Lane Change Alert (LCA) . . . . . . . . . . . . . . . . . 250
Lane Keep Assist (LKA) . . . . . . . . . . . . . . . . . . . 252
Lane Keep Assist Light . . . . . . . . . . . . . . . . . . . .110
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 50
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 78
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
LED Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
Illumination Control . . . . . . . . . . . . . . . . . . . 135
LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 292
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . 105
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Brake System Warning . . . . . . . . . . . . . . . . 108
Charging System . . . . . . . . . . . . . . . . . . . . . . 107
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Electric Parking Brake . . . . . . . . . . . . . . . . . . 109 Lights (cont'd)
Engine Coolant Temperature
Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 113
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Front Fog Lamp . . . . . . . . . . . . . . . . . . . . . . . . . 114
Gear Shifting . . . . . . . . . . . . . . . . . . . . . . . . . . 110
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . . 114
High/Low Beam Changer . . . . . . . . . . . . . . 132
Hill Descent Control . . . . . . . . . . . . . . . . . . . 110
Lane Keep Assist . . . . . . . . . . . . . . . . . . . . . . . 110
Low Fuel Warning . . . . . . . . . . . . . . . . . . . . . . 114
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . 105
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Service Electric Parking Brake . . . . . . . . . . 109
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . 110
Traction Control System (TCS)/StabiliTrak . . . . . . . . . . . . . . . . . . . . . . 112
Traction Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 17
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . 17
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-14608671) - 2021 - CRC - 10/26/20
Index 391
Replacement PartsAirbags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 355
Replacing Airbag System . . . . . . . . . . . . . . . . . . 64
Replacing LATCH System Parts after a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Replacing Seat Belt System Parts after
a Crash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Reporting Safety Defects Canadian Government . . . . . . . . . . . . . . . . . 372
General Motors . . . . . . . . . . . . . . . . . . . . . . . . 372
U.S. Government . . . . . . . . . . . . . . . . . . . . . . . . 371
Restraints Where to Put . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Retained Accessory Power (RAP) . . . . . . . . . . 217
Reverse Tilt Mirrors . . . . . . . . . . . . . . . . . . . . . . . 28
Roads Driving, Wet . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Roadside Assistance Program . . . . . . . . . . . . 366
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Roof Rack System . . . . . . . . . . . . . . . . . . . . . . . . . 88
Rotation, Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Routing, Engine Drive Belt . . . . . . . . . . . . . . . 362
Running the Vehicle While Parked . . . . . . . 220S
Safety Defects Reporting Canadian Government . . . . . . . . . . . . . . . . . 372
General Motors . . . . . . . . . . . . . . . . . . . . . . . . 372
U.S. Government . . . . . . . . . . . . . . . . . . . . . . . . 371
Safety Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Safety System Check . . . . . . . . . . . . . . . . . . . . . .53
Satellite Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Scheduling Appointments . . . . . . . . . . . . . . . . 368
Sealant Kit, Tire . . . . . . . . . . . . . . . . . . . . . . . . . . 320
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Extender . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
How to Wear Seat Belts Properly . . . . . . . 48
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . 50
Reminders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Replacing after a Crash . . . . . . . . . . . . . . . . . 53
Use During Pregnancy . . . . . . . . . . . . . . . . . . 52
Seats
Adjustment, Front . . . . . . . . . . . . . . . . . . . . . . 37
Head Restraints . . . . . . . . . . . . . . . . . . . . . . . . . 35
Heated and Ventilated Front . . . . . . . . . . . . 41
Heated, Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Lumbar Adjustment, Front . . . . . . . . . . . . . . 38
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Power Adjustment, Front . . . . . . . . . . . . . . . 37
Rear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Reclining Seatbacks . . . . . . . . . . . . . . . . . . . . . 38 Seats (cont'd)
Third Row Seat . . . . . . . . . . . . . . . . . . . . . . . . . 46
Securing Child Restraints . . . . . . . . . . . . . . 78, 80
Security Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 376
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Vehicle Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198 Accessories and Modifications . . . . . . . . . 268
Doing Your Own Work . . . . . . . . . . . . . . . . . 269
Maintenance Records . . . . . . . . . . . . . . . . . . 357
Maintenance, General Information . . . . . 345
Parts Identification . . . . . . . . . . . . . . . . . . . . . 358
Scheduling Appointments . . . . . . . . . . . . . . 368
Service Electric Parking Brake Light . . . . . . 109
Services
Special Application . . . . . . . . . . . . . . . . . . . . . 351
Servicing System . . . . . . . . . . . . . . . . . . . . . . . . 162
Servicing the Airbag . . . . . . . . . . . . . . . . . . . . . . 63
Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Out of Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Side Blind Zone Alert (SBZA) . . . . . . . . . . . . . 250
Signals, Turn and Lane-Change . . . . . . . . . . . .134
Software Updates . . . . . . . . . . . . . . . . . . . . . . . . 144