emergency towing GMC SIERRA 1500 2017 Owners Manual

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Driving and Operating 283
system warning light will flash and a
chime will sound warning you that
the parking brake is still on.
If you are towing a trailer and are
parking on a hill, seeDriving
Characteristics and Towing
Tips 0304.
Brake Assist
The Brake Assist feature is
designed to assist the driver in
stopping or decreasing vehicle
speed in emergency driving
conditions. This feature uses the
stability system hydraulic brake
control module to supplement the
power brake system under
conditions where the driver has
quickly and forcefully applied the
brake pedal in an attempt to quickly
stop or slow down the vehicle. The
stability system hydraulic brake
control module increases brake
pressure at each corner of the
vehicle until the ABS activates.
Minor brake pedal pulsation or
pedal movement during this time is
normal and the driver should
continue to apply the brake pedal as the driving situation dictates. The
Brake Assist feature will
automatically disengage when the
brake pedal is released or brake
pedal pressure is quickly
decreased.
Hill Start Assist (HSA)
This vehicle has a Hill Start Assist
(HSA) feature, which may be useful
when the vehicle is stopped on a
grade. This feature is designed to
prevent the vehicle from rolling,
either forward or rearward, during
vehicle drive off. After you
completely stop and hold the vehicle
in a complete standstill on a grade,
HSA will automatically activate.
During the transition period between
when you release the brake pedal
and start to accelerate to drive off
on a grade, HSA holds the braking
pressure for a maximum of
two seconds to ensure that there is
no rolling. The brakes will
automatically release when the
accelerator pedal is applied within
the two-second window. If the
vehicle is equipped with the
Integrated Trailer Brake Control(ITBC) system, HSA may also apply
the trailer brakes. It will not activate
if the vehicle is in a drive gear and
facing downhill or if the vehicle is
facing uphill and in R (Reverse).
There may be situations on minor
hills (less than 5% grade) with a
loaded vehicle or while pulling a
trailer where HSA may activate.
If you release the brake pedal and
then reapply the brake pedal while
HSA is activated, the brake pedal
typically feels firmer with less pedal
travel.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
362 Vehicle Care
Overheated Engine
Protection
Operating Mode
If an overheated engine condition
exists and the ENGINE POWER IS
REDUCED message displays, an
overheat protection mode which
alternates firing groups of cylinders
helps to prevent engine damage. In
this mode, a loss in power and
engine performance will be noticed.
This operating mode allows the
vehicle to be driven to a safe place
in an emergency. Driving extended
distances and/or towing a trailer in
the overheat protection mode
should be avoided.
Caution
After driving in the overheated
engine protection operating
mode, the engine oil will be
severely degraded. Any repairs
performed before the engine is
cool may cause engine damage.
Allow the engine to cool before(Continued)
Caution (Continued)
attempting any repair. Repair the
cause of coolant loss, change the
oil, and reset the oil life system.
SeeEngine Oil 0348.
Engine Fan
If the 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 an increase in fan
noise may be heard. 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. This fan noise may also be heard
when starting the engine. It will go
away as the fan clutch partially
disengages.
If the vehicle has electric cooling
fan(s), the fans may be heard
spinning at low speed during most
everyday driving. The fans may turn
off if no cooling is required. Under
heavy vehicle loading, trailer towing,
high outside temperatures,
or operation of the air conditioning
system, the fans may change to
high speed and an increase in fan
noise may be heard. 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.
The electric engine cooling fans
may run after the engine has been
turned. off. This is normal and no
service is required.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
462 Customer Information
.Lock-Out Service: Service to
unlock the vehicle if you are
locked out. A remote unlock may
be available if you have
OnStar
®. For security reasons,
the driver must present
identification before this service
is given.
. Emergency Tow from a Public
Road or Highway: Tow to the
nearest GMC dealer for warranty
service, or if the vehicle was in a
crash and cannot be driven.
Assistance is not given when the
vehicle is stuck in the sand,
mud, or snow.
. Flat Tire Change: Service to
change a flat tire with the spare
tire. The spare tire, if equipped,
must be in good condition and
properly inflated. It is the owner's
responsibility for the repair or
replacement of the tire if it is not
covered by the warranty.
. Battery Jump Start: Service to
jump start a dead battery.
. Trip Interruption Benefits and
Assistance: If your trip is
interrupted due to a warranty event, incidental expenses may
be reimbursed within the
Powertrain warranty period.
Items considered are reasonable
and customary hotel, meals,
rental car, or a vehicle being
delivered back to the customer,
up to 805 km (500 mi).
Services Not Included in
Roadside Assistance
.
Impound towing caused by
violation of any laws.
. Legal fines.
. Mounting, dismounting,
or changing of snow tires,
chains, or other traction devices.
Service is not provided if a vehicle
is in an area that is not accessible
to the service vehicle or is not a
regularly traveled or maintained
public road, which includes ice and
winter roads. Off-road use is not
covered.
Services Specific to
Canadian-Purchased Vehicles
. Fuel Delivery: Reimbursement
is up to 7 liters. Diesel fuel
delivery may be restricted.
Propane and other fuels are not
provided through this service.
. Lock-Out Service: Vehicle
registration is required.
. Trip Interruption Benefits and
Assistance: Must be over
150 kilometers from where your
trip was started to qualify.
Pre-authorization, original
detailed receipts, and a copy of
the repair orders are required.
Once authorization has been
received, the Roadside
Assistance advisor will help to
make arrangements and explain
how to receive payment.
. Alternative Service: If
assistance cannot be provided
right away, the Roadside
Assistance advisor may give
permission to get local
emergency road service. You will
receive payment, up to $100,
after sending the original receipt

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
Customer Information 465
Aftermarket collision parts are also
available. These are made by
companies other than GM and may
not have been tested for the vehicle.
As a result, these parts may fit
poorly, exhibit premature durability/
corrosion problems, and may not
perform properly in subsequent
collisions. Aftermarket parts are not
covered by the GM New Vehicle
Limited Warranty, and any vehicle
failure related to such parts is not
covered by that warranty.
Repair Facility
GM also recommends that you
choose a collision repair facility that
meets your needs before you ever
need collision repairs. Your dealer
may have a collision repair center
with GM-trained technicians and
state-of-the-art equipment, or be
able to recommend a collision repair
center that has GM-trained
technicians and comparable
equipment.
Insuring the Vehicle
Protect your investment in the GM
vehicle with comprehensive and
collision insurance coverage. There
are significant differences in the
quality of coverage afforded by
various insurance policy terms.
Many insurance policies provide
reduced protection to the GM
vehicle by limiting compensation for
damage repairs through the use of
aftermarket collision parts. Some
insurance companies will not
specify aftermarket collision parts.
When purchasing insurance, we
recommend that you ensure that the
vehicle will be repaired with GM
original equipment collision parts.
If such insurance coverage is not
available from your current
insurance carrier, consider switching
to another insurance carrier.
If the vehicle is leased, the leasing
company may require you to have
insurance that ensures repairs with
Genuine GM Original Equipment
Manufacturer (OEM) parts or
Genuine Manufacturer replacementparts. Read the lease carefully, as
you may be charged at the end of
the lease for poor quality repairs.
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 see
Roadside Assistance
Program
0461.
Gather the following information:
. Driver name, address, and
telephone number.
. Driver license number.
. Owner name, address, and
telephone number.
. Vehicle license plate number.

GMC Sierra/Sierra Denali Owner Manual (GMNA-Localizing-U.S./Canada/
Mexico-9955992) - 2017 - crc - 5/3/16
484 Index
D
Damage Repair, Collision . . . . . . . 464
Danger, Warning, and Caution . . . . 3
Data CollectionInfotainment System . . . . . . . . . . 470
OnStar . . . . . . . . . . . . . . . . . . . . . . . 470
Data Recorders, Event . . . . . . . . . 469
Daytime Running Lamps (DRL) . . . . . . . . . . . . . . . . . . 169
Defensive Driving . . . . . . . . . . . . . . . 239
Delayed Locking . . . . . . . . . . . . . . . . . 35
Diagnostics
OnStar
®. . . . . . . . . . . . . . . . . . . . . . 475
Distracted Driving . . . . . . . . . . . . . . . 238
Dome Lamps . . . . . . . . . . . . . . . . . . . 173
Door
Ajar Light . . . . . . . . . . . . . . . . . . . . . 141
Ajar Messages . . . . . . . . . . . . . . . 146
Delayed Locking . . . . . . . . . . . . . . . . 35
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Power Locks . . . . . . . . . . . . . . . . . . . . 35
Drive Belt Routing, Engine . . . . . . 456
Driver Assistance Systems . . . . . 290
Driver Information Center (DIC) . . . . . . . . . . . . . . . . . . 141
Driving Assistance Systems . . . . . . . . . . 293 Driving (cont'd)
Characteristics and
Towing Tips . . . . . . . . . . . . . . . . . 304
Defensive . . . . . . . . . . . . . . . . . . . . . 239
Drunk . . . . . . . . . . . . . . . . . . . . . . . . . 239
For Better Fuel Economy . . . . . . . 26
Hill and Mountain Roads . . . . . . 247
If the Vehicle is Stuck . . . . . . . . . 249
Loss of Control . . . . . . . . . . . . . . . 241
Off-Road . . . . . . . . . . . . . . . . . . . . . 242
Off-Road Recovery . . . . . . . . . . . 241
Vehicle Load Limits . . . . . . . . . . . 250
Wet Roads . . . . . . . . . . . . . . . . . . . 246
Winter . . . . . . . . . . . . . . . . . . . . . . . . 248
Dual Automatic Climate Control System . . . . . . . . . . . . . . . . 231
E
E85 or FlexFuel . . . . . . . . . . . . . . . . 301
Electrical Equipment,Add-On . . . . . . . . . . . . . . . . . . . . . . . 334
Electrical System Engine Compartment FuseBlock . . . . . . . . . . . . . . . . . . . . . . . . 376
Fuses . . . . . . . . . . . . . . . . . . . . . . . . 376
Instrument Panel Fuse Block . . . . . . . . . . . . . . . . . . . 379, 381
Overload . . . . . . . . . . . . . . . . . . . . . 376 Emergency
OnStar
®. . . . . . . . . . . . . . . . . . . . . . 472
Engine Air Cleaner/Filter . . . . . . . . . . . . . 355
Check and Service EngineSoon Light . . . . . . . . . . . . . . . . . . 133
Compartment Overview . . . . . . . 343
Coolant . . . . . . . . . . . . . . . . . . . . . . . 357
Coolant Heater . . . . . . . . . . . . . . . 262
Coolant Temperature Gauge . . . . . . . . . . . . . . . . . . . . . . 127
Coolant Temperature Warning Light . . . . . . . . . . . . . . . 138
Cooling System . . . . . . . . . . . . . . . 356
Cooling System Messages . . . 146
Drive Belt Routing . . . . . . . . . . . . 456
Exhaust . . . . . . . . . . . . . . . . . . . . . . 266
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . 362
Oil Life System . . . . . . . . . . . . . . . 351
Oil Messages . . . . . . . . . . . . . . . . . 147
Oil Pressure Gauge . . . . . . . . . . 126
Oil Pressure Light . . . . . . . . . . . . 139
Overheated Protection Operating Mode . . . . . . . . . . . . . 362
Overheating . . . . . . . . . . . . . . . . . . 360
Power Messages . . . . . . . . . . . . . 147
Running While Parked . . . . . . . . 267
Starting . . . . . . . . . . . . . . . . . . . . . . . 260