2019 GMC ACADIA exhaust

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
228 Driving and Operating
4. Move the shift lever to thedesired position.
If you still are unable to shift out of
P (Park): 1. Fully release the shift lever button.
2. While holding down the brake pedal, press the shift lever
button again.
3. Move the shift lever to the desired position.
If you still cannot move the shift
lever from P (Park), see your dealer.
Parking over Things
That Burn
{Warning
Things that can burn could touch
hot exhaust parts under the
vehicle and ignite. Do not park
over papers, leaves, dry grass,
or other things that can burn.
Active Fuel Management
This vehicle's engine may be
equipped with Active Fuel
Management, which allows the
engine to operate on either all of its
cylinders, or in reduced cylinder
operation, depending on the driving
conditions.
When less power is required, such
as cruising at a constant vehicle
speed, the system will operate in
reduced cylinder operation mode,
allowing the vehicle to achieve
better fuel economy. When greater
power demands are required, such
as accelerating from a stop,
passing, or merging onto a freeway,
the system will maintain full-cylinder
operation.
If the vehicle has an Active Fuel
Management indicator, see Driver
Information Center (DIC) for more
information on using this display.
Extended Parking
It is best not to park with the vehicle
running. If the vehicle is left running,
be sure it will not move and there is
adequate ventilation.
See Shifting Into Park 0226 and
Engine Exhaust 0229.
If the vehicle is left parked and
running with the RKE transmitter
outside the vehicle, it will continue
to run for up to half an hour.
If the vehicle is left parked and
running with the RKE transmitter
inside the vehicle, it will continue to
run for up to an hour.
The vehicle could turn off sooner if it
is parked on a hill, due to lack of
available fuel.
The timer will reset if the vehicle is
taken out of P (Park) while it is
running.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
Driving and Operating 229
Engine Exhaust
{Warning
Engine exhaust contains carbon
monoxide (CO), which cannot be
seen or smelled. Exposure to CO
can cause unconsciousness and
even death.
Exhaust may enter the vehicle if:. The vehicle idles in areas
with poor ventilation
(parking garages, tunnels,
deep snow that may block
underbody airflow or tail
pipes).
. The exhaust smells or
sounds strange or different.
. The exhaust system leaks
due to corrosion or damage.
. The vehicle exhaust system
has been modified,
damaged, or improperly
repaired.
(Continued)
Warning (Continued)
.There are holes or openings
in the vehicle body from
damage or aftermarket
modifications that are not
completely sealed.
If unusual fumes are detected or
if it is suspected that exhaust is
coming into the vehicle: . Drive it only with the
windows completely down.
. Have the vehicle repaired
immediately.
Never park the vehicle with the
engine running in an enclosed
area such as a garage or a
building that has no fresh air
ventilation.
Running the Vehicle
While Parked
It is better not to park with the
engine running.
If the vehicle is left with the engine
running, follow the proper steps to
be sure the vehicle will not move.
See Shifting Into Park 0226 and
Engine Exhaust 0229.
If parking on a hill and pulling a
trailer, see Driving Characteristics
and Towing Tips 0271.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
Driving and Operating 273
Warning (Continued)
.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 0229.
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.
Before driving, inspect all trailer
hitch parts and attachments, safety
chains, electrical connectors, lamps,
tires, and mirrors. See
Towing
Equipment 0278. If the trailer has
electric brakes, start the
combination moving and then
manually apply the trailer brake
controller to check the trailer brakes
work. During the trip, occasionally
check that the cargo and trailer are
secure and that the lamps and any
trailer brakes are working.
Towing with a Stability Control
System
When towing, the stability control
system might be heard. The system
reacts to vehicle movement caused
by the trailer, which mainly occurs
during cornering. This is normal
when towing heavier trailers.
Following Distance
Stay at least twice as far behind the
vehicle ahead as you would when
driving without a trailer. This can
help to avoid heavy braking and
sudden turns.
Passing
More passing distance is needed
when towing a trailer. The
combination of the vehicle and
trailer will not accelerate as quickly
and is much longer than the vehicle
alone. It is necessary to go much
farther beyond the passed vehicle
before returning to the lane. Pass
on level roadways. Avoid passing
on hills if possible.
Backing Up
Hold the bottom of the steering
wheel with one hand. To move the
trailer to the left, move that hand to
the left. To move the trailer to the
right, move that hand to the right.
Always back up slowly and,
if possible, have someone
guide you.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
278 Driving and Operating
for each trailer. Never exceed the
maximum loads for your vehicle,
hitch and trailer.
After loading the trailer, separately
weigh the trailer and then the trailer
tongue to see if the weights are
appropriate for your vehicle. If the
trailer weight is too high, it may be
possible to transfer some of the
cargo into your vehicle. If the trailer
tongue weight is too high or too low,
it may be possible to rearrange
some of the cargo inside of the
trailer.
Do not exceed the maximum
allowable tongue weight for your
vehicle. Use the shortest hitch
extension available to position the
hitch ball closer to your vehicle. This
will help reduce the effect of the
trailer tongue weight on the trailer
hitch and the rear axle.
If a cargo carrier is used in the
trailer hitch receiver, choose a
carrier that positions the load as
close to the vehicle as possible.
Make sure the total weight,
including the carrier, is no more thanhalf of the maximum allowable
tongue weight for the vehicle or
227 kg (500 lb), whichever is less.
Ask your dealer for trailering
information or assistance.
Towing Equipment
Hitches
Always use the correct hitch
equipment for your vehicle.
Crosswinds, large trucks going by,
and rough roads can affect the
trailer and the hitch.
Proper hitch equipment for your
vehicle helps maintain combination
control. Many trailers can be towed
using a weight-carrying hitch which
has a coupler latched to the hitch
ball, or a tow eye latched to a pintle
hook. Other trailers may require a
weight-distributing hitch that uses
spring bars to distribute the trailer
tongue weight between your vehicle
and trailer axles. See
“Trailer
Tongue Weight” underTrailer
Towing 0275 or weight limits with
various hitch types. Never attach rental hitches or other
bumper-type hitches. Only use
frame-mounted hitches that do not
attach to the bumper.
Always seal any holes in your
vehicle if the trailer hitch removed.
If not sealed, dirt, water, and carbon
monoxide (CO) from the exhaust
may enter your vehicle. See
Engine
Exhaust 0229.
Hitch Cover
To remove hitch cover, if equipped:
1. Remove the two fasteners on the lower tabs.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
Vehicle Care 285
Storing the Tire Sealant andCompressor Kit . . . . . . . . . . . . . 348
Tire Changing . . . . . . . . . . . . . . . . 349
Compact Spare Tire . . . . . . . . . . 355
Jump Starting
Jump Starting - North America . . . . . . . . . . . . . . . . . . . . . 356
Towing the Vehicle
Towing the Vehicle . . . . . . . . . . . 359
Recreational VehicleTowing . . . . . . . . . . . . . . . . . . . . . . 359
Appearance Care
Exterior Care . . . . . . . . . . . . . . . . . 363
Interior Care . . . . . . . . . . . . . . . . . . 368
Floor Mats . . . . . . . . . . . . . . . . . . . . 371
General Information
For service and parts needs, visit
your dealer. You will receive
genuine GM parts and GM-trained
and supported service people.
Genuine GM parts have one of
these marks:
California Proposition
65 Warning
{Warning
Most motor vehicles, including
this one, as well as many of its
service parts and fluids, contain
and/or emit chemicals known to
the State of California to cause
cancer and birth defects or other
reproductive harm. Engine
exhaust, many parts and
systems, many fluids, and some
component wear by-products
contain and/or emit these
chemicals. For more information
go to www.P65Warnings.ca.gov/
passenger-vehicle.
See Battery - North America 0304
and Jump Starting - North America
0 356 and the back cover.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
342 Vehicle Care
Warning (Continued)
5. Place wheel blocks,if equipped, on both sides of
the tire at the opposite
corner of the tire being
changed.
This vehicle may come with a jack
and spare tire or a tire sealant and
compressor kit. To use the jacking
equipment to change a spare tire
safely, follow the instructions below.
Then see Tire Changing 0349. To
use the tire sealant and compressor
kit, see Tire Sealant and
Compressor Kit 0342.
When the vehicle has a flat tire (2),
use the following example as a
guide to assist you in the placement
of wheel blocks (1), if equipped.
1. Wheel Block (If Equipped)
2. Flat Tire
The following information explains
how to repair or change a tire.
Tire Sealant and
Compressor Kit
{Warning
Idling a vehicle in an enclosed
area with poor ventilation is
dangerous. Engine exhaust may
enter the vehicle. Engine exhaust
contains carbon monoxide (CO)
which cannot be seen or smelled.
It can cause unconsciousness (Continued)
Warning (Continued)
and even death. Never run the
engine in an enclosed area that
has no fresh air ventilation. For
more information, seeEngine
Exhaust 0229.
{Warning
Overinflating a tire could cause
the tire to rupture and you or
others could be injured. Be sure
to read and follow the tire sealant
and compressor kit instructions
and inflate the tire to its
recommended pressure. Do not
exceed the recommended
pressure.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-12146149) - 2019 - crc - 7/30/18
376 Service and Maintenance
parts, or signs of wear at least
once a year. SeeExterior Care
0 363.
. Inspect power steering for
proper attachment, connections,
binding, leaks, cracks,
chafing, etc.
. Visually inspect halfshafts and
drive shafts for excessive wear,
lubricant leaks, and/or damage
including: tube dents or cracks,
constant velocity joint or
universal joint looseness,
cracked or missing boots, loose
or missing boot clamps, center
bearing excessive looseness,
loose or missing fasteners, and
axle seal leaks.
. Check restraint system
components. See Safety System
Check 077.
. Visually inspect fuel system for
damage or leaks.
. Visually inspect exhaust system
and nearby heat shields for
loose or damaged parts. .
Lubricate body components. See
Exterior Care 0363.
. Check starter switch. See Starter
Switch Check 0305.
. Check automatic transmission
shift lock control function. See
Automatic Transmission Shift
Lock Control Function Check
0305.
. Check parking brake and
automatic transmission park
mechanism. See Park Brake and
P (Park) Mechanism Check
0 305.
. Check accelerator pedal for
damage, high effort, or binding.
Replace if needed.
. Visually inspect gas strut for
signs of wear, cracks, or other
damage. Check the hold open
ability of the strut. If the hold
open ability is low, service the
gas strut. See Gas Strut(s)
0 307. .
Check tire sealant expiration
date, if equipped. See Tire
Sealant and Compressor Kit
0 342.
. Inspect sunroof track and seal,
if equipped. See Sunroof053.

GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/-
Mexico-12146149) - 2019 - crc - 7/30/18
Index 417
Appearance Care (cont'd)Interior . . . . . . . . . . . . . . . . . . . . . . . . 368
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . 193
Armrest Storage . . . . . . . . . . . . . . . . 112
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . . 394
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . . 257
Assistance Systems for Parking and Backing . . . . . . . . . . 253
Audio Theft-Deterrent Feature . . . . . . . 174
Auto Stop
Stop/Start System . . . . . . . . . . . . 224
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . 50
Door Locks . . . . . . . . . . . . . . . . . . . . . 39
Forward Braking . . . . . . . . . . . . . . 259
Headlamp System . . . . . . . . . . . . 167
Transmission . . . . . . . . . . . . . . . . . 230
Transmission Fluid . . . . . . . . . . . 294
Automatic Transmission
Manual Mode . . . . . . . . . . . . . . . . . 232
Shift Lock Control FunctionCheck . . . . . . . . . . . . . . . . . . . . . . . 305
Auxiliary Devices . . . . . . . . . . . . . . . . . . . . . . . 187B
Battery
Exterior Lighting BatterySaver . . . . . . . . . . . . . . . . . . . . . . . 172
Load Management . . . . . . . . . . . . 171
Power Protection . . . . . . . . . . . . . 171
Battery - North America . . . . 304, 356
Blade Replacement, Wiper . . . . . 306
Bluetooth Overview . . . . . . . . . . . . . . . . 188, 189
Brake Parking, Electric . . . . . . . . . . . . . . 234
System Warning Light . . . . . . . . 138
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 302
Antilock . . . . . . . . . . . . . . . . . . . . . . . 233
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 235
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 303
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 207 Automatic Forward . . . . . . . . . . . 259
Braking System Front Pedestrian (FPB) . . . . . . . 261
Break-In, New Vehicle . . . . . . . . . . 221
Bulb Replacement Halogen Bulbs . . . . . . . . . . . . . . . . 309
Headlamp Aiming . . . . . . . . . . . . . 308
Headlamps . . . . . . . . . . . . . . . . . . . 309
License Plate Lamps . . . . . . . . . 309
Buying New Tires . . . . . . . . . . . . . . . 335
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 122
California
Perchlorate MaterialsRequirements . . . . . . . . . . . . . . . 286
California Proposition
65 Warning . . . . . . . . . .285, 304, 356, Back Cover
Canadian Vehicle Owners . . . . . . . . 2
Capacities and
Specifications . . . . . . . . . . . . . . . . . 387
Carbon Monoxide Engine Exhaust . . . . . . . . . . . . . . . 229
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . 41
Winter Driving . . . . . . . . . . . . . . . . 215
Cargo Cover . . . . . . . . . . . . . . . . . . . . . . . . . .113
Management System . . . . . . . . . .114
Tie-Downs . . . . . . . . . . . . . . . . . . . . .113
Caution, Danger, and Warning . . . . 2
Center Console Storage . . . . . . . . 112
Chains, Tire . . . . . . . . . . . . . . . . . . . . 340
Charging System Light . . . . . . . . . 136
Check Engine Light (MalfunctionIndicator) . . . . . . . . . . . . . . . . . . . . 136