2020 BUICK ENCLAVE trailer

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
Driving and Operating 239Trailer Weight Ratings When towing a trailer, the weight of
the loaded vehicle and trailer must
be within the weight ratings for the
vehicle.
.
GCWR: Gross Combined Weight
Rating
.
GVWR: Gross Vehicle Weight
Rating
.
Maximum Trailer Weight Rating
.
Maximum Trailer Tongue Weight
The only way to be sure the weight
is not exceeding any of these
ratings is to weigh the tow vehicle
and trailer combination, fully loaded
for the trip, getting individual
weights for each of these items.
{ Warning
You and others could be seriously
injured or killed if the trailer is too
heavy or the trailer brakes are
inadequate for the load. The
(Continued) Warning (Continued) vehicle may be damaged, and the
repairs would not be covered by
the vehicle warranty.
Only tow a trailer if all the steps in
this section have been followed.
Ask your dealer for advice and
information about towing a trailer.
Gross Combined Weight
Rating (GCWR) GCWR is the total allowable weight
of the completely loaded vehicle
and trailer including any fuel,
passengers, cargo, equipment, and
accessories. Do not exceed the
GCWR for your vehicle. The GCWR
for the vehicle is on the Tow Rating
Chart following. Gross Vehicle Weight
Rating (GVWR) For information about the vehicle's
maximum load capacity, see Vehicle
Load Limits 0 177 . When calculating
the GVWR with a trailer attached,
the trailer tongue weight must be
included as part of the weight the
vehicle is carrying.
Maximum Trailer Weight
Rating The maximum trailer weight rating is
calculated assuming the tow vehicle
has a driver, a front seat passenger,
and all required trailering
equipment. Weight of additional
optional equipment, passengers,
and cargo in the tow vehicle must
be subtracted from the trailer weight
rating.
Use the tow rating chart to
determine how much the trailer can
weigh, based on the vehicle model,
powertrain and trailering options.

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
240 Driving and Operating Vehicle Maximum Trailer Weight *GCWR
Front-Wheel Drive 680 kg (1,500 lb) 3 050 kg (6,725 lb)
Front-Wheel Drive, V92 Trailer Towing Package 2 268 kg (5,000 lb) 4 650 kg (10,250 lb)
All-Wheel Drive 680 kg (1,500 lb) 3 200 kg (7,055 lb)
All-Wheel Drive, V92 Trailer Towing Package 2 268 kg (5,000 lb) 4 750 kg (10,470 lb)
*The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and
trailer including any passengers, cargo, equipment, and conversions. The GCWR for the vehicle should not be
exceeded.
Maximum Trailer Tongue
Weight Rating The Maximum Trailer Tongue
Weight Rating is the allowable
trailer tongue weight that the vehicle
can support. Do not exceed a
maximum trailer tongue weight of
500 lbs. The trailer tongue weight
contributes to the Gross Vehicle
Weight (GVW). GVW includes the
CURB WEIGHT of your vehicle, any
passengers, cargo, equipment and
the trailer tongue weight. Vehicle
options, passengers, cargo, and
equipment reduce the maximum allowable tongue weight the vehicle
can carry, which also reduces the
maximum allowable trailer weight.
Trailer Load Balance The correct trailer load balance
must be maintained to ensure trailer
stability. Incorrect load balance is a
leading cause of trailer sway.
The trailer tongue weight (1) should
be 10 – 15% of the loaded trailer
weight (2). Some specific trailer
types, such as boat trailers, fall

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
Driving and Operating 241outside of this range. Always refer
to the trailer owner ’ s manual for the
recommended trailer tongue weight
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
tongue to see if the weights are
proper. If the trailer tongue weight is
too high or too low, adjustments
might be made by moving some
items around in the trailer.
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 than
half 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.
Never attach rental hitches or other
bumper-type hitches. Only use
frame-mounted hitches that do not
attach to the bumper.
Hitch Cover
To remove hitch cover, if equipped: 1. Remove the two fasteners on
the lower tabs.
2. Pull the lower edge of the
cover to about a 45 degree
angle.
3. Pull the cover downward to
disengage the upper
attachments.
To reinstall hitch cover:
1. Hold cover at a 45 degree
angle to the vehicle and push
the upper tabs into the slots in
the bumper.
2. Push the bottom of the cover
forward until the lower tabs line
up with the lower slots.
3. Snap the hitch cover into place
by pushing the upper corners
forward.
4. Reinstall the two fasteners on
the lower tabs.
Consider using mechanical sway
controls with any trailer. Ask a
trailering professional about sway
controls or refer to the trailer
manufacturer's recommendations
and instructions.

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
242 Driving and Operating Weight-Distributing Hitch
Adjustment A weight-distributing hitch may be
useful with some trailers.
1. Front of Vehicle
2. Body to Ground Distance
When using a weight-distributing
hitch, measure the front fender
height above the front axle
distance (2) before and after
connecting the trailer. Adjust the
spring bars until the front fender
height distance (2) is approximately
half way between the first and
second measurements. Tires .
Do not tow a trailer while using a
compact spare tire on the
vehicle.
.
Tires must be properly inflated to
support loads while towing a
trailer. See Tires 0 281 for
instructions on proper tire
inflation.
Safety Chains Always attach chains between the
vehicle and the trailer, and attach
the chains to the holes on the trailer
hitch platform. Instructions about
safety chains may be provided by
the hitch manufacturer or by the
trailer manufacturer.
Cross the safety chains under the
tongue of the trailer to help prevent
the tongue from contacting the road
if it becomes separated from the
hitch. Always leave just enough
slack so the combination can turn.
Never allow safety chains to drag on
the ground. Trailer Brakes Loaded trailers over 450 kg
(1,000 lb) must be equipped with
brake systems and with brakes for
each axle. Trailer braking equipment
conforming to Canadian Standards
Association (CSA) requirement
CAN3-D313, or its equivalent, is
recommended.
State or local regulations may
require trailers to have their own
braking system if the loaded weight
of the trailer exceeds certain
minimums that can vary from state
to state.
Read and follow the instructions for
the trailer brakes so they are
installed, adjusted, and maintained
properly.
Never attempt to tap into your
vehicle's hydraulic brake system.
If you do, both the vehicle anti-lock
brakes and the trailer brakes may
not function, which could result in a
crash.

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
Driving and Operating 243Trailer Wiring The trailer wiring harness (if
equipped), with a 7-pin connector is
located at the rear of the vehicle,
and it is tied to the vehicle's frame.
If the vehicle is not equipped with a
7-pin trailer connector, the body
harness has provisions to connect a
trailer harness and a 7-pin trailer
connector which is available through
your dealer.
Use only a round, seven-wire
connector with flat blade terminals
meeting SAE J2863 specifications
for proper electrical connectivity. The seven-wire harness contains
the following trailer circuits:
1 Stop/Turn
Signal Left Yellow/Blue
2 Tail/Parking
Lamps Gray/Brown
3 Reverse Lamps White/
Green
4 Battery Feed Red/Green
5 Stop/Turn Signal
Right Green/
Brown
6 Electric Trailer
Brake* Blue
7 Ground Black
* Circuit powered by electric trailer
brake control wiring provisions.
Electric Trailer Brake Control
Wiring Provisions
Wiring provisions for an aftermarket
electric trailer brake controller are
included with the vehicle as part of
the trailer wiring package. The
harness contains the following
circuits: Electric Trailer
Brakes Blue
Battery Feed Red/Green or
Red/Blue
Brake Apply
Signal White/Blue
Ground Black
Refer to the aftermarket electric
trailer brake controller owner's
manual to determine wire color
coding of the electric trailer brake
controller. The wire colors on the
brake controller may be different
from the vehicle. The electric trailer
brake controller should be installed
by your dealer or a qualified service
center.
If equipped, there are four blunt cut
wires inside the front driver side
instrument panel. It will be
necessary to have a technician
connect the 12-volt power to the
engine compartment fuse block.

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
244 Driving and Operating Trailer Lamps Always check all trailer lamps are
working at the beginning of each
trip, and periodically on longer trips.
Turn Signals When Towing a
Trailer When properly connected, the trailer
turn signals will illuminate to indicate
the vehicle is turning, changing
lanes, or stopping. When towing a
trailer, the arrows on the instrument
cluster will illuminate even if the
trailer is not properly connected or
the bulbs are burned out.
Tow/Haul Mode For instructions on how to enter
Tow/Haul mode, see Driver Mode
Control 0 202 .
Tow/Haul assists when pulling a
heavy trailer or a large or heavy
load. See Tow/Haul Mode 0 196 .
Tow/Haul Mode is designed to be
most effective when the vehicle and
trailer combined weight is at least
75% of the vehicle's Gross Combined Weight Rating (GCWR).
See “ Weight of the Trailer ” under
Trailer Towing 0 238 .
Tow/Haul Mode is most useful when
pulling a heavy trailer or a large or
heavy load:
.
through rolling terrain
.
in stop-and-go traffic
.
in busy parking lots
Operating the vehicle in Tow/Haul
Mode when lightly loaded or not
towing will not cause damage;
however, it is not recommended and
may result in unpleasant engine and
transmission driving characteristics
and reduced fuel economy.
Trailer Sway
Control (TSC) Vehicles with StabiliTrak/Electronic
Stability Control (ESC) have a
Trailer Sway Control (TSC) feature.
Trailer sway is unintended
side-to-side motion of a trailer while
towing. If the vehicle is towing a
trailer and the TSC detects that
sway is increasing, the vehicle brakes are selectively applied at
each wheel, to help reduce
excessive trailer sway. If equipped
with the Integrated Trailer Brake
Control (ITBC) system, and the
trailer has an electric brake system,
StabiliTrak/ESC may also apply the
trailer brakes.
If TSC is enabled, the Traction
Control System (TCS)/StabiliTrak/
ESC warning light will flash on the
instrument cluster. Reduce vehicle
speed by gradually removing your
foot from the accelerator. If trailer
sway continues, StabiliTrak/ESC
can reduce engine torque to help
slow the vehicle. TSC will not
function if StabiliTrak/ESC is turned
off. See Traction Control/Electronic
Stability Control 0 200 .

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
Driving and Operating 245
{ WarningTrailer sway can result in a crash
and in serious injury or death,
even if the vehicle is equipped
with TSC.
If the trailer begins to sway,
reduce vehicle speed by
gradually removing your foot from
the accelerator. Then pull over to
check the trailer and vehicle to
help correct possible causes,
including an improperly or
overloaded trailer, unrestrained
cargo, improper trailer hitch
configuration, or improperly
inflated or incorrect vehicle or
trailer tires. See Towing
Equipment 0 241 for trailer ratings
and hitch setup
recommendations. Trailer Tires Special Trailer (ST) tires differ from
vehicle tires. Trailer tires are
designed with stiff sidewalls to help
prevent sway and to support heavy
loads. These features can make it
difficult to determine if the trailer tire
pressures are low only based on a
visual inspection.
Always check all trailer tire
pressures before each trip when the
tires are cool. Low trailer tire
pressure is a leading cause of trailer
tire blow-outs.
Trailer tires deteriorate over time.
The trailer tire sidewall will show the
week and year the tire was
manufactured. Many trailer tire
manufacturers recommend
replacing tires more than six
years old. Overloading is another leading
cause of trailer tire blow-outs. Never
load your trailer with more weight
than the tires are designed to
support. The load rating is located
on the trailer tire sidewall.
Always know the maximum speed
rating for the trailer tires before
driving. This may be significantly
lower than the vehicle tire speed
rating. The speed rating may be on
the trailer tire sidewall. If the speed
rating is not shown, the default
trailer tire speed rating is 105 km/h
(65 mph).

Buick Enclave Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
13527524) - 2020 - CRC - 4/10/19
Vehicle Care 275Fuses Usage
F2 Starter 1
F3 DC DC
transformer 1
F4 –
F5 DC DC
transformer 2
F6 –
F7 –
F8 –
F9 Vacuum pump
F10 Front wiper
F11 –
F12 –
F13 Starter 2
F14 –
F15 Rear wiper
F16 –
F17 –
F18 –
F19 – Fuses Usage
F20 –
F21 –
F22 Electronic brake
control module
F23 Parking/Trailer
lamps
F24 Right trailer
stoplamp/Turnlamp
F25 Steering
column lock
F26 –
F27 Left trailer
stoplamp/Turnlamp
F28 –
F29 –
F30 Washer pump
F31 –
F32 Left low-beam
headlamp
F33 Front fog lamps
F34 Horn
F35 – Fuses Usage
F36 –
F37 Right low-beam
headlamp
F38 Automatic
headlamp leveling
motor
F39 Transmission
control module
F40 Left rear bus
electrical center/
Ignition
F41 Instrument cluster
F42 Heating,
ventilation, and air
conditioning
F43 Head-up display
F44 Communication
gateway module/
Run/Crank
F45 –
F46 –
F47 –
F48 –