GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9159268) - 2016 - crc - 7/31/15
Driving and Operating 239
Safety Chains
Always attach chains between the
vehicle and the trailer. 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 rig can turn. Never allow safety
chains to drag on the ground.
Trailer Brakes
A loaded trailer that weighs more
than 450 kg (1,000 lb) needs to have
its own brake system that is
adequate for the weight of the
trailer. Be sure to read and follow
the instructions for the trailer brakes
so they are installed, adjusted, and
maintained properly.
Because the vehicle has antilock
brakes, do not try to tap into the
vehicle's hydraulic brake system.
If you do, both brake systems will
not work well, or at all.
Trailer Wiring Harness
Basic Trailer Wiring
The trailer wiring harness, with a
seven-pin connector, is located at
the rear of the vehicle and is tied to
the vehicle's frame. The harness
connector can be plugged into a
seven-pin universal heavy-duty
trailer connector available through
your dealer.
The seven-wire harness contains
the following trailer circuits:
.Yellow: Left Stop/Turn Signal
. Dark Green: Right Stop/Turn
Signal
. Brown: Taillamps
. Black: Ground
. Light Green: Back-up Lamps
. Red/Black: Battery Feed
. Dark Blue: Trailer Brake*
*The fuse for this circuit is installed
in the underhood electrical center,
but the wires are not connected.
They should be connected by your
dealer or a qualified service center. If the back-up lamp circuit is not
functional, contact your dealer.
If a remote (non-vehicle) battery is
being charged, press the Tow/Haul
mode switch located on the center
console near the climate controls.
This will boost the vehicle system
voltage and properly charge the
battery. If the trailer is too light for
Tow/Haul mode, turn on the
headlamps (non-HID only) as a
second way to boost the vehicle
system and charge the battery.
Electric Trailer Brake Control
Wiring Provisions
These wiring provisions for an
electric trailer brake controller are
included with the vehicle as part of
the trailer wiring package. The
instrument panel contains blunt cut
wires above the parking brake
assembly for the electric trailer
brake controller. The harness
contains the following wires:
.
Red/Black: Power Supply
. White: Brake Switch Signal
. Gray: Illumination
GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9159268) - 2016 - crc - 7/31/15
274 Vehicle Care
FusesUsage
OBS
DET/URS Rear Park Assist/
Side Blind Zone
Alert/Forward
Collision Alert/
Universal Remote
System
PDM Power Mirrors, Liftgate Release
PWR MODE Power Mode
PWR MIR Power Mirrors RDO Radio
REAR WPR Rear Wiper
RT TRN SIG Passenger Side Turn Signal
STR WHL ILLUM Steering Wheel
Illumination
USB CHRG USB Charging
Relay Side Relays Usage
LT/
PWR/SEAT Driver Side Power
Seat Relay
RT/
PWR/SEAT Passenger Side
Power Seat Relay
PWR/WNDW Power Windows Relay
PWR/
COLUMN Power Steering
Column Relay
L/GATE Liftgate Relay
LCK Power Lock Relay
REAR/WSW Rear Window Washer Relay
UNLCK Power Unlock Relay
DRL/
LO BEAM Daytime Running
Lamps Relay/
Low-Beam
Headlamps Relay
LT/UNLCK Driver Side Unlock Relay
DRL/
LO BEAM Daytime Running
Lamps Relay (If
Equipped)
GMC Acadia/Acadia Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9159268) - 2016 - crc - 7/31/15
370 Index
Transmission (cont'd)Fluid, Automatic . . . . . . . . . . . . . . 249
Messages . . . . . . . . . . . . . . . . . . . . 138
Transportation Program,
Courtesy . . . . . . . . . . . . . . . . . . . . . . 342
Turn and Lane-Change Signals . . . . . . . . . . . . . . . . . . . . . . . . 152
U
Uniform Tire Quality Grading . . . 291
Universal Remote System . . . . . . 146Operation . . . . . . . . . . . . . . . . . . . . . 149
Programming . . . . . . . . . . . . . . . . . 146
Using This Manual . . . . . . . . . . . . . . . . 2
V
Vehicle
Alarm System . . . . . . . . . . . . . . . . . . 38
Canadian Owners . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . 195
Identification Number (VIN) . . . 333
Load Limits . . . . . . . . . . . . . . . . . . . 200
Messages . . . . . . . . . . . . . . . . . . . . 131
Personalization . . . . . . . . . . . . . . . 140
Reminder Messages . . . . . . . . . . 139
Remote Start . . . . . . . . . . . . . . . . . . . 31
Security . . . . . . . . . . . . . . . . . . . . . . . . 38
Speed Messages . . . . . . . . . . . . . 139 Vehicle (cont'd)
Towing . . . . . . . . . . . . . . . . . . . . . . . . 307
Vehicle Ahead Indicator . . . . . . . . 120
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . . . 282
Vehicle Data Recording and Privacy . . . . . . . . . . . . . . . . . . . . . . . . 347
Ventilation, Air . . . . . . . . . . . . . . . . . . 191
Visors . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Voltage Devices and Wiring . . . . 265
Voltmeter Gauge . . . . . . . . . . . . . . . 114
W
Warning Brake System Light . . . . . . . . . . . .118
Caution and Danger . . . . . . . . . . . . . 2
Lane Departure (LDW) . . . . . . . 228
Warning Lights, Gauges, and Indicators . . . . . . . . . . . . . . . . . . . . . 110
Warnings Hazard Flashers . . . . . . . . . . . . . . 152
Washer Fluid . . . . . . . . . . . . . . . . . . . 257 Messages . . . . . . . . . . . . . . . . . . . . 139
Wheels
Alignment and Tire Balance . . 293
Different Size . . . . . . . . . . . . . . . . . 291
Replacement . . . . . . . . . . . . . . . . . 293
When It Is Time for New
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . 289 Where to Put the Restraint . . . . . . 84
Windows . . . . . . . . . . . . . . . . . . . . . . . . 43
Power . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Windshield Replacement . . . . . . . . . . . . . . . . . 263
Wiper/Washer . . . . . . . . . . . . . . . . 105
Winter
Driving . . . . . . . . . . . . . . . . . . . . . . . . 198
Winter Tires . . . . . . . . . . . . . . . . . . . . 276
Wiper Blade Replacement . . . . . . 262
Wipers Rear Washer . . . . . . . . . . . . . . . . . 106
Wiring, High Voltage Devices . . . 265
