2021 GMC CANYON tow mode

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
220 Driving and Operating
Warning (Continued)
.Do not move the vehicle if someone is
in the path of the trailer. Some parts
of the trailer might be underwater and
not visible to people who are assisting
in launching the boat.
Disconnect the wiring to the trailer before
backing the trailer into the water to prevent
damage to the electrical circuits on the
trailer. Reconnect the wiring to the trailer
after removing the trailer from the water.
If the trailer has electric brakes that can
function when the trailer is submerged, it
might help to leave the electrical trailer
connector attached to maintain trailer brake
functionality while on the boat ramp.
To back the trailer into the water: 1. If equipped, place the vehicle in four-wheel-drive high.
2. Slowly back down the boat ramp until the boat is floating, but no further than
necessary.
3. Press and hold the brake pedal, but do not shift into P (Park) yet.
4. Have someone place chocks under the front wheels of the vehicle. 5. Gradually release the brake pedal to
allow the chocks to absorb the load of
the trailer.
6. Reapply the brake pedal. Then apply the parking brake and shift into P (Park).
7. Release the brake pedal.
Pulling the Trailer from the Water
To pull the trailer of the water: 1. Press and hold the brake pedals.
2. Start the engine and shift into gear.
3. Release the parking brake.
4. Let up on the brake pedal.
5. Drive slowly until the tires are clear of the chocks.
6. Stop and have someone pick up and store the chocks.
7. Slowly pull the trailer from the water.
8. Once the vehicle and trailer have been driven from the sloped part of the boat
ramp, the vehicle can be shifted from
four-wheel-drive high. Shift into the drive
mode that is appropriate for the road
conditions.
Caution
If the vehicle tires begin to spin and the
vehicle begins to slide toward the water,
remove your foot from the accelerator
pedal and apply the brake pedal. Seek
help to have the vehicle towed up
the ramp.
Maintenance when Trailer Towing
The vehicle needs service more often when
used to tow trailers. See Maintenance
Schedule 0310. It is especially important to
check the automatic transmission fluid,
engine oil, axle lubricant, belts, cooling
system, and brake system before and during
each trip.
Check periodically to see that all nuts and
bolts on the trailer hitch are tight.
Engine Cooling When Trailer Towing
The cooling system may temporarily
overheat during severe operating conditions.
See Engine Overheating 0247.
Trailer Towing
If equipped with a diesel engine, see the
Duramax diesel supplement.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
222 Driving and Operating
3. Add the weight of all passengers.
4. Add the weight of all cargo in thevehicle.
5. Add the weight of hitch hardware such as a draw bar, ball, load equalizer bars,
or sway bars.
6. Add the weight of any accessories or aftermarket equipment added to the
vehicle.
The resulting weight cannot exceed the
GCWR for the vehicle.
The gross combined weight can also be
confirmed by weighing the truck and trailer
on a public scale. The truck and trailer
should be loaded for the trip with
passengers and cargo.
Gross Vehicle Weight Rating (GVWR)
For information about the vehicle's
maximum load capacity, see Vehicle Load
Limits 0180. 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
The maximum trailer weight rating is
calculated assuming the tow vehicle has a
driver, a front seat passenger, and all
required trailering equipment. This value
represents the heaviest trailer the vehicle
can tow, but it may be necessary to reduce the trailer weight to stay within the GCWR,
GVWR, maximum trailer tongue load,
or GAWR-RR for the vehicle.
Use the tow rating chart to determine how
much the trailer can weigh, based on the
vehicle model, powertrain and trailering
options.
Weights listed apply for conventional trailers
unless otherwise noted.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
226 Driving and Operating
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.Trailer Wiring Harness
For vehicles not equipped with heavy-duty
trailering, a harness is secured underneath
the left side of the vehicle, next to the spare
tire. The harness requires the installation of
a trailer connector, which is available
through your dealer. The seven-wire harness
contains the following trailer circuits:
.Yellow: Left stop/turn signal
.Green: Right stop/turn signal
.Brown: Taillamps/parking lamps
.Black: Ground
.Gray: Back-up lamps
.Orange: Battery feed
.Blue: Trailer brake
To help charge a remote (non-vehicle)
battery, press the Tow/Haul Mode button
on the center stack. If the trailer is too light
for Tow/Haul Mode, turn on the headlamps
to help charge the battery.
Trailer Brake Control Wiring Harness
A four-wire harness, without connector, is
secured behind the left side kick panel. The
harness contains the following circuits:
.Red/Green: Battery feed
.Black: Ground
.White/Blue: Brake signal to controller
.Blue: Trailer Brake power to trailer
connector
To remove the left side kick panel, start at
the front of the panel pulling toward the
rear of the vehicle and lift upward to
disengage the integral clips.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
Driving and Operating 227
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, seeTow/Haul Mode 0196.
Tow/Haul assists when pulling a heavy
trailer or a large or heavy load.
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 0220.
Tow/Haul Mode is most useful when towing
a heavy trailer or carrying 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.
Integrated Trailer Brake Control System
The vehicle may have an Integrated Trailer
Brake Control (ITBC) system for use with
electric trailer brakes or most electric over
hydraulic trailer brake systems. These
instructions apply to both types of electric
trailer brakes.
This symbol is on the Trailer Brake Control
Panel on vehicles with an ITBC system. The
power output to the trailer brakes is
proportional to the amount of vehicle
braking. This available power output to the
trailer brakes can be adjusted to a wide
range of trailering situations.
The ITBC system is integrated with the
vehicle’s brake, antilock brake, and
StabiliTrak/Electronic Stability Control (ESC)
systems. In trailering conditions that cause
the vehicle’s antilock brake or StabiliTrak/
ESC systems to activate, power sent to the
trailer's brakes will be automatically
adjusted to minimize trailer wheel lock-up.
This does not imply that the trailer has
StabiliTrak/ESC.
If the vehicle’s brake, anti-lock brake,
or StabiliTrak/ESC systems are not
functioning properly, the ITBC system may
not function fully or at all. Make sure all of
these systems are fully operational to allow
the ITBC system to function properly.
The ITBC system is powered through the
vehicle's electrical system. Turning the
ignition off will also turn off the ITBC
system. The ITBC system is fully functional
only when the ignition is in ON/RUN.
{Warning
Connecting a trailer that has an air brake
system may result in reduced or
complete loss of trailer braking, including
increased stopping distance or trailer
instability which could result in serious
(Continued)

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
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334 Customer Information
If a Crash Occurs
If there has been an injury, call emergency
services for help. Do not leave the scene of
a crash until all matters have been taken
care of. Move the vehicle only if its position
puts you in danger, or you are instructed to
move it by a police officer.
Give only the necessary information to
police and other parties involved in the
crash.
For emergency towing seeRoadside
Assistance Program 0330.
Gather the following information:
.Driver name, address, and telephone
number
.Driver license number
.Owner name, address, and telephone
number
.Vehicle license plate number
.Vehicle make, model, and model year
.Vehicle Identification Number (VIN)
.Insurance company and policy number
.General description of the damage to the
other vehicle Choose a reputable repair facility that uses
quality replacement parts. See
“Collision
Parts” earlier in this section.
If the airbag has inflated, see What Will You
See after an Airbag Inflates? 038.
Managing the Vehicle Damage Repair
Process
In the event that the vehicle requires
damage repairs, GM recommends that you
take an active role in its repair. If you have
a pre-determined repair facility of choice,
take the vehicle there, or have it towed
there. Specify to the facility that any
required replacement collision parts be
original equipment parts, either new
Genuine GM parts or recycled original GM
parts. Remember, recycled parts will not be
covered by the GM vehicle warranty.
Insurance pays the bill for the repair, but
you must live with the repair. Depending on
your policy limits, your insurance company
may initially value the repair using
aftermarket parts. Discuss this with the
repair professional, and insist on Genuine
GM parts. Remember, if the vehicle is
leased, you may be obligated to have the vehicle repaired with Genuine GM parts,
even if your insurance coverage does not
pay the full cost.
If another party's insurance company is
paying for the repairs, you are not obligated
to accept a repair valuation based on that
insurance company's collision policy repair
limits, as you have no contractual limits
with that company. In such cases, you can
have control of the repair and parts choices
as long as the cost stays within reasonable
limits.
Publication Ordering Information
Service Manuals
Service manuals have the diagnosis and
repair information on the engine,
transmission, axle, suspension, brakes,
electrical system, steering system, body, etc.
Customer Literature
Owner’s manuals are written specifically for
owners and are intended to provide basic
operational information about the vehicle.
The owner’s manual includes the
Maintenance Schedule for all models.

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
352 Index
Lamps (cont'd)Malfunction Indicator (Check
Engine) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
On Reminder . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Reading . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Lane Departure Warning (LDW) . . . . . . . . . . . 213
Lane Departure Warning Light . . . . . . . . . . . . 90
Lap-Shoulder Belt . . . . . . . . . . . . . . . . . . . . . . . . . 30
LATCH System Replacing Parts after a Crash . . . . . . . . . . . 64
LATCH, Lower Anchors and Tethers for Children . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Illumination Control . . . . . . . . . . . . . . . . . . . 106
Lights Airbag Readiness . . . . . . . . . . . . . . . . . . . . . . . 86
Antilock Brake System (ABS)Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Brake System Warning . . . . . . . . . . . . . . . . . 89
Charging System . . . . . . . . . . . . . . . . . . . . . . . 87
Check Engine (Malfunction
Indicator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Cruise Control . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Door Ajar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Engine Oil Pressure . . . . . . . . . . . . . . . . . . . . . 92
Flash-to-Pass . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 Lights (cont'd)
Four-Wheel-Drive . . . . . . . . . . . . . . . . . . . . . . . 89
Front Fog Lamp . . . . . . . . . . . . . . . . . . . . . . . . . 93
High-Beam On . . . . . . . . . . . . . . . . . . . . . . . . . . 93
High/Low Beam Changer . . . . . . . . . . . . . . 103
Hill Descent Control . . . . . . . . . . . . . . . . . . . . 90
Lane Departure Warning . . . . . . . . . . . . . . . . 90
Low Fuel Warning . . . . . . . . . . . . . . . . . . 92, 93
Seat Belt Reminders . . . . . . . . . . . . . . . . . . . . 85
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
StabiliTrak OFF . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . 90
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . . . . . . . . . . . 91
Traction Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Limited-Slip Differential . . . . . . . . . . . . . . . . . . 206
Locks Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 12
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . 13
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Low Fuel Warning Light . . . . . . . . . . . . . . 92, 93
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . . . . . . . . 50 Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . . . . .23
Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
M
Maintenance
Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
Maintenance Schedule . . . . . . . . . . . . . . . . . . . 310 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . 319
Transfer Case . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Malfunction Indicator Lamp . . . . . . . . . . . . . . . 87
Manual Mirrors . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Map Data Updates . . . . . . . . . . . . . . . . . . . . . . . . 135
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Media Avoiding Untrusted Devices . . . . . . . . . . . . . 119
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Mirrors Automatic Dimming Rearview . . . . . . . . . . . 17
Blind Spot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

GMC Canyon/Canyon Denali Owner Manual (GMNA-Localizing-U.S./Canada-
14430430) - 2021 - CRC - 9/9/20
356 Index
Tires (cont'd)Buying New Tires . . . . . . . . . . . . . . . . . . . . . . 278
Chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 282
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
Compact Spare . . . . . . . . . . . . . . . . . . . . . . . . 292
Designations . . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Different Size . . . . . . . . . . . . . . . . . . . . . . . . . . 279
Full-Size Spare . . . . . . . . . . . . . . . . . . . . . . . . . 293
If a Tire Goes Flat . . . . . . . . . . . . . . . . . . . . . 282
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 276
Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Pressure Monitor Operation . . . . . . . . . . . 274
Pressure Monitor System . . . . . . . . . . . . . . 273
Rotation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 277
Sidewall Labeling . . . . . . . . . . . . . . . . . . . . . . 267
Terminology and Definitions . . . . . . . . . . . 270
Uniform Tire Quality Grading . . . . . . . . . . 280
Wheel Alignment and Tire Balance . . . . 281
Wheel Replacement . . . . . . . . . . . . . . . . . . . . 281
When It Is Time for New Tires . . . . . . . . . 278
Winter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Top Tier Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Tow/Haul Mode . . . . . . . . . . . . . . . . . . . . . . . . . 196
Tow/Haul Mode Light . . . . . . . . . . . . . . . . . . . . 90
Towing Driving Characteristics . . . . . . . . . . . . . . . . . . 217
Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224 Towing (cont'd)
General Information . . . . . . . . . . . . . . . . . . . 216
Recreational Vehicle . . . . . . . . . . . . . . . . . . . 297
Trailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Trailer Sway Control (TSC) . . . . . . . . . . . . . 230
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Traction
Control System (TCS)/StabiliTrakLight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Limited-Slip Differential . . . . . . . . . . . . . . . . 206
Off Light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Traction Control/Electronic Stability
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Trademarks and License Agreements . . . . . 156
Trailer Sway Control (TSC) . . . . . . . . . . . . . . . . . . . . 230
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Transfer Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Transmission Automatic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Fluid, Automatic . . . . . . . . . . . . . . . . . . . . . . . 243
Transportation Program, Courtesy . . . . . . . 332
Trip Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Truck-Camper Loading Information . . . . . . . .185
Turn and Lane-Change Signals . . . . . . . . . . . 105
Turn Signal Bulb Replacement . . . . . . . . . . . . . . . . . . . . . . 257U
Underseat Storage . . . . . . . . . . . . . . . . . . . . . . . . 74
Uniform Tire Quality Grading . . . . . . . . . . . . 280
UpdatesMap Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
USB Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Using the Navigation System . . . . . . . . . . . . .124
Using the System . . . . . . . . . . . . . . . . . . . . . . . . . 113
Using This Manual . . . . . . . . . . . . . . . . . . . . . . . . . .2
V
Vehicle Alarm System . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Canadian Owners . . . . . . . . . . . . . . . . . . . . . . . . 2
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Identification Number (VIN) . . . . . . . . . . . . 323
Load Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Personalization . . . . . . . . . . . . . . . . . . . . . . . . . 99
Remote Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Speed Messages . . . . . . . . . . . . . . . . . . . . . . . . 99
Towing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Vehicle Ahead Indicator . . . . . . . . . . . . . . . . . . . 90
Vehicle Care Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Vehicle Data Recording and Privacy . . . . . . 336