towing GMC YUKON XL 2007 Owner's Guide

Electric Brake Control Wiring
Provisions
These wiring provisions are included with your
vehicle as part of the trailer wiring package. These
provisions are for an electric brake controller. The
instrument panel contains blunt cut wires near the
data link connector for the trailer brake controller.
The harness contains the following wires:
Dark Blue: Brake Signal to Trailer Connector
Red/Black: Battery
Light Blue/White: Brake Switch
White: Ground
It should be installed by your dealer or a qualied
service center.
Power Winches
If you wish to use a power winch on your vehicle,
only use it when your vehicle is stationary or
anchored.
Trailer Recommendations
You must subtract your hitch loads from the Cargo
Weight Rating (CWR) for your vehicle. CWR is
the maximum weight of the load your vehicle can
carry. It doesn’t include the weight of the people
inside. But you can gure about 150 lbs. (68 kg) for
each seat. The total cargo load must not be
more than your vehicle’s CWR.
Weigh your vehicle with the trailer attached, so
that you won’t go over the GVWR or GAWR. If you
are using a weight-distributing hitch, weigh the
vehicle without the spring bars in place.
You’ll get the best performance if you spread out
the weight of your load the right way, and if
you choose the correct hitch and trailer brakes.
For more information, seeTowing a Trailer
on page 405.
422

If No Steam Is Coming From Your
Engine
The ENGINE OVERHEATED STOP ENGINE or
the ENGINE OVERHEATED IDLE ENGINE
message, along with a low coolant condition, can
indicate a serious problem.
If you get an engine overheat warning, but see or
hear no steam, the problem may not be too
serious. Sometimes the engine can get a little too
hot when you:
Climb a long hill on a hot day.
Stop after high-speed driving.
Idle for long periods in traffic.
Tow a trailer. SeeTowing a Trailer on
page 405.If you get the ENGINE OVERHEATED STOP
ENGINE or the ENGINE OVERHEATED IDLE
ENGINE message with no sign of steam, try this
for a minute or so:
1. If you have an air conditioner and it is on,
turn it off.
2. Turn on your heater to full hot at the highest
fan speed and open the windows as
necessary.
3. In heavy traffic, let the engine idle in
NEUTRAL (N) while stopped. If it is safe to
do so, pull off the road, shift to PARK (P)
or NEUTRAL (N) and let the engine idle.
If you no longer have the overheat warning, you
can drive. Just to be safe, drive slower for
about 10 minutes. If the warning does not come
back on, you can drive normally.
If the warning continues, pull over, stop, and park
your vehicle immediately.
453

If there is still no sign of steam and your vehicle is
equipped with an engine-driven cooling fan,
push down the accelerator until the engine speed
is about twice as fast as normal idle speed for
at least ve minutes while you are parked.
If there is still no sign of steam and your vehicle is
equipped with an electric cooling fan, idle the
engine for ve minutes while you are parked.
If you still have the warning, turn off the engine
and get everyone out of the vehicle until it
cools down. Also, see “Overheated Engine
Protection Operating Mode” later in this section.
You may decide not to lift the hood but to get
service help right away.Overheated Engine Protection
Operating Mode
If an overheated engine condition exists and the
REDUCED ENGINE POWER message is
displayed, an overheat protection mode which
alternates ring groups of cylinders helps prevent
engine damage. In this mode, you will notice a
loss in power and engine performance. This
operating mode allows your vehicle to be driven to
a safe place in an emergency. Driving extended
miles (km) and/or towing a trailer in the overheat
protection mode should be avoided.
Notice:After driving in the overheated engine
protection operating mode, to avoid engine
damage, allow the engine to cool before
attempting any repair. The engine oil will be
severely degraded. Repair the cause of coolant
loss, change the oil and reset the oil life
system. SeeEngine Oil on page 438.
454

5. Then replace the pressure cap. Be sure the
pressure cap is hand-tight and fully seated.
6. Verify coolant level after engine is shutoff and
the coolant is cold. If necessary, repeat
coolant ll procedure steps 1 through 6.
Engine Fan Noise
If your vehicle has a clutched engine cooling fan,
when the clutch is engaged, the fan spins
faster to provide more air to cool the engine. In
most everyday driving conditions, the fan is
spinning slower and the clutch is not fully engaged.
This improves fuel economy and reduces fan
noise. Under heavy vehicle loading, trailer towing,
and/or high outside temperatures, the fan speed
increases as the clutch more fully engages, so you
may hear an increase in fan noise. This is
normal and should not be mistaken as the
transmission slipping or making extra shifts. It is
merely the cooling system functioning properly.
The fan will slow down when additional cooling is
not required and the clutch disengages.You may also hear this fan noise when you start
the engine. It will go away as the fan clutch
partially disengages.
If your vehicle has electric cooling fans, you may
hear the fans spinning at low speed during
most everyday driving. The fans may turn off if no
cooling is required. Under heavy vehicle loading,
trailer towing, and/or high outside temperatures, or
if you are operating your air conditioning system,
the fans may change to high speed and you
may hear an increase in fan noise. This is normal
and indicates that the cooling system is
functioning properly. The fans will change to low
speed when additional cooling is no longer
required.
460

(h)Change automatic transmission uid and lter
if the vehicle is mainly driven under one or
more of these conditions:
In heavy city traffic where the outside
temperature regularly reaches 90°F (32°C) or
higher.
In hilly or mountainous terrain.
When doing frequent trailer towing.
Uses such as found in taxi, police, or delivery
service.
(i)Drain, ush, and rell cooling system. This
service can be complex; you should have your
dealer perform this service. See Engine Coolant on
page 449 for what to use. Inspect hoses. Clean
radiator, condenser, pressure cap, and ller neck.
Pressure test the cooling system and pressure cap.
(j)A uid loss in any vehicle system could indicate
a problem. Have the system inspected and
repaired and the uid level checked. Add uid if
needed.
(k)Inspect system. Check all fuel and vapor lines
and hoses for proper hook-up, routing, and
condition. Check that the purge valve works
properly, if equipped. Replace as needed.(l)If you drive regularly under dusty conditions,
inspect the lter at each engine oil change.
(m)Visually inspect belt for fraying, excessive
cracks, or obvious damage. Replace belt if
necessary.
Owner Checks and Services
These owner checks and services should be
performed at the intervals specied to help
ensure the safety, dependability, and emission
control performance of your vehicle. Your
GM Goodwrench
®dealer can assist you with
these checks and services.
Be sure any necessary repairs are completed at
once. Whenever any uids or lubricants are added
to your vehicle, make sure they are the proper
ones, as shown inRecommended Fluids and
Lubricants on page 564.
At Each Fuel Fill
It is important to perform these underhood checks
at each fuel ll.
560

For prompt and efficient assistance when calling,
please provide the following to the Roadside
Assistance Representative:
Your name, home address, and home
telephone number.
Telephone number of your location.
Location of the vehicle.
Model, year, color, and license plate number
of the vehicle.
Odometer reading, Vehicle Identication
Number (VIN) and delivery date of the vehicle.
Description of the problem.
While we hope you never have the occasion to
use our service, it is added security while traveling
for you and your family. Remember, we are
only a phone call away. U.S. customers call
GMC Roadside Assistance:1-800-462-8782, text
telephone (TTY) users, call1-888-889-2438.
Canadian customers call1-800-268-6800.GMC and General Motors of Canada Limited
reserve the right to limit services or reimbursement
to an owner or driver when, in their sole
discretion, the claims become excessive in
frequency or type of occurrence.
Roadside Assistance is not part of or included in
the coverage provided by the New Vehicle Limited
Warranty. GMC and General Motors of Canada
reserve the right to make any changes or
discontinue the Roadside Assistance program at
any time without notication.
Towing and Road Service Exclusions
Specically excluded from Roadside Assistance
coverage are towing or services for vehicles
operated on a non-public roadway or highway,
nes, impound towing caused by a violation
of local, Municipal, State, Provincial, or Federal
law, and mounting, dismounting or changing
of snow tires, chains, or other traction devices.
580

If your vehicle cannot be driven, know where
the towing service will be taking it. Get a
card from the tow truck operator or write down
the driver’s name, the service’s name, and
the phone number.
Remove any valuables from your vehicle
before it is towed away. Make sure this
includes your insurance information and
registration if you keep these items in your
vehicle.
Gather the important information you will need
from the other driver. Things like name,
address, phone number, driver’s license
number, vehicle license plate, vehicle make,
model and model year, Vehicle Identication
Number (VIN), insurance company and
policy number, and a general description of
the damage to the other vehicle.
If possible, call your insurance company from
the scene of the accident. They will walk you
through the information they will need. If
they ask for a police report, phone or go to
the police department headquarters the
next day and you can get a copy of the report
for a nominal fee. In some states with “no
fault” insurance laws, a report may not
be necessary. This is especially true if there
are no injuries and both vehicles are driveable.
Choose a reputable collision repair facility
for your vehicle. Whether you select a
GM dealer or a private collision repair facility
to x the damage, make sure you are
comfortable with them. Remember, you will
have to feel comfortable with their work
for a long time.
Once you have an estimate, read it carefully
and make sure you understand what work
will be performed on your vehicle. If you have
a question, ask for an explanation. Reputable
shops welcome this opportunity.
587

Power (cont.)
Steering Fluid........................................... 461
Windows................................................... 131
Pretensioners, Safety Belt.............................. 60
Programmable Automatic Door Locks........... 121
Q
Questions and Answers About Safety Belts....... 42
R
Radios......................................................... 274
Care of Your CD and DVD Player............. 337
Care of Your CDs and DVDs.................... 336
Navigation/Radio System,
see Navigation Manual.......................... 321
Radio with CD.......................................... 278
Radio with CD and DVD........................... 295
Rear Seat Audio....................................... 332
Setting the Time................................276, 277
Theft-Deterrent.......................................... 334
Understanding Reception.......................... 335
Rainsense™ II Wipers.................................. 193
Reading Lamps............................................ 204Rear Air Conditioning and Heating System...... 220
Rear Air Conditioning and Heating System
and Electronic Climate Controls................ 222
Rear Axle..................................................... 472
Locking..................................................... 347
Rear Door Security Locks............................ 122
Rear Heated Seats........................................ 19
Rear Safety Belt Comfort Guides................... 56
Rear Seat Armrest....................................... 176
Rear Seat Audio (RSA)................................ 332
Rear Seat Entertainment System.................. 321
Rear Seat Passengers, Safety Belts............... 54
Rear Side Window Antenna.......................... 337
Rear Storage Area....................................... 176
Rear Windshield Washer/Wiper.................... 195
Rearview Mirror, Automatic Dimming with
Compass and Temperature Display........... 160
Rearview Mirror, Automatic Dimming with
OnStar
®, Compass and Temperature
Display..................................................... 157
Reclining Seatbacks....................................... 15
Recommended Fluids and Lubricants........... 564
Recovery Hooks........................................... 389
Recreational Vehicle Towing......................... 401
Remote Keyless Entry System..................... 112
603

Stuck in Sand, Mud, Ice, or Snow................ 388
Sun Visors................................................... 132
Sunroof........................................................ 181
T
Tachometer.................................................. 226
Taillamps
Turn Signal, Stoplamps and
Back-up Lamps..................................... 478
Theft-Deterrent, Radio.................................. 334
Theft-Deterrent Systems............................... 132
Content Theft-Deterrent............................. 132
PASS-Key
®III+......................................... 134
PASS-Key®III+ Operation......................... 134
Third Row Seat.............................................. 33
Throttle, Adjustable....................................... 140
Tilt Wheel..................................................... 189
Tire
Pressure Light.......................................... 235
Tires............................................................ 482
Aluminum or Chrome-Plated Wheels,
Cleaning................................................ 534
Buying New Tires...................................... 500
Chains...................................................... 506Tires (cont.)
Changing a Flat Tire................................. 508
Cleaning................................................... 535
Different Size............................................ 502
If a Tire Goes Flat.................................... 507
Ination - Tire Pressure............................. 490
Inspection and Rotation............................ 497
Installing the Spare Tire............................ 513
Pressure Monitor System.......................... 492
Removing the Flat Tire............................. 513
Removing the Spare Tire and Tools.......... 509
Secondary Latch System.......................... 519
Spare Tire................................................. 526
Storing a Flat or Spare Tire and Tools...... 522
Tire Sidewall Labeling............................... 484
Tire Terminology and Denitions................ 487
Uniform Tire Quality Grading..................... 502
Wheel Alignment and Tire Balance............ 504
Wheel Replacement.................................. 504
When It Is Time for New Tires.................. 499
Tow/Haul Mode............................................ 145
Tow/Haul Mode Light.................................... 242
Towing
Recreational Vehicle.................................. 401
Towing a Trailer........................................ 405
Your Vehicle.............................................. 400
606