2016 GMC SIERRA brake light

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
380 Vehicle Care
Caution (Continued)
freezing occurs, which could
damage the tank if it is
completely full.
Brakes
Disc brake pads have built-in wear
indicators that make a high-pitched
warning sound when the brake pads
are worn and new pads are needed.
The sound can come and go or be
heard all the time the vehicle is
moving, except when applying the
brake pedal firmly.
{Warning
The brake wear warning sound
means that soon the brakes will
not work well. That could lead to
a crash. When the brake wear
warning sound is heard, have the
vehicle serviced.
Caution
Continuing to drive with worn-out
brake pads could result in costly
brake repair.
Some driving conditions or climates
can cause a brake squeal when the
brakes are first applied or lightly
applied. This does not mean
something is wrong with the brakes.
Properly torqued wheel nuts are
necessary to help prevent brake
pulsation. When tires are rotated,
inspect brake pads for wear and
evenly tighten wheel nuts in the
proper sequence to torque
specifications in Capacities and
Specifications 0468.
Brake linings should always be
replaced as complete axle sets.
Brake Pedal Travel
See your dealer if the brake pedal
does not return to normal height,
or if there is a rapid increase in
pedal travel. This could be a sign
that brake service may be required.
Replacing Brake System Parts
Always replace brake system parts
with new, approved replacement
parts. If this is not done, the brakes
may not work properly. The braking
performance expected can change
in many other ways if the wrong
replacement brake parts are
installed or parts are improperly
installed.
Brake Fluid
The brake master cylinder reservoir
is filled with DOT 3 brake fluid. See
Engine Compartment Overview
0 358 for the location of the
reservoir.

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Vehicle Care 381
There are only two reasons why the
brake fluid level in the reservoir may
go down:
.Normal brake lining wear. When
new linings are installed, the
fluid level goes back up.
. A fluid leak in the brake
hydraulic system. Have the
brake hydraulic system fixed.
With a leak, the brakes will not
work well.
Always clean the brake fluid
reservoir cap and the area around
the cap before removing it.
Do not top off the brake fluid.
Adding fluid does not correct a leak.
If fluid is added when the linings are
worn, there will be too much fluid
when new brake linings are
installed. Add or remove fluid, as
necessary, only when work is done
on the brake hydraulic system.{Warning
If too much brake fluid is added, it
can spill on the engine and burn,
if the engine is hot enough. You
or others could be burned, and
the vehicle could be damaged.
Add brake fluid only when work is
done on the brake hydraulic
system.
When the brake fluid falls to a low
level, the brake warning light comes
on. See Brake System Warning
Light 0142.
Brake fluid absorbs water over time.
Replace brake fluid at the specified
intervals to prevent increased
stopping distance. See Maintenance
Schedule 0454.
Checking Brake Fluid
Check brake fluid by looking at the
brake fluid reservoir. See Engine
Compartment Overview 0358.
The fluid level should be above
MIN. If it is not, have the brake
hydraulic system checked to see if
there is a leak.
After work is done on the brake
hydraulic system, make sure the
level is above MIN but not over the
MAX mark.
What to Add
Use only GM approved DOT 3
brake fluid from a clean, sealed
container. See Recommended
Fluids and Lubricants 0463.

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Vehicle Care 417
treadwear indicators. SeeTire
Inspection 0414 andTire Rotation
0 414 for additional information.
The rubber in tires ages over time.
This also applies to the spare tire,
if the vehicle has one, even if it is
never used. Multiple factors
including temperatures, loading
conditions, and inflation pressure
maintenance affect how fast aging
takes place. GM recommends that
tires, including the spare if
equipped, be replaced after six
years, regardless of tread wear. The
tire manufacture date is the last four
digits of the DOT Tire Identification
Number (TIN) which is molded into
one side of the tire sidewall. The
first two digits represent the week
(01-52) and the last two digits, the
year. For example, the third week of
the year 2010 would have a
four-digit DOT date of 0310.
Vehicle Storage
Tires age when stored normally
mounted on a parked vehicle. Park
a vehicle that will be stored for at
least a month in a cool, dry, clean
area away from direct sunlight to slow aging. This area should be free
of grease, gasoline, or other
substances that can deteriorate
rubber.
Parking for an extended period can
cause flat spots on the tires that
may result in vibrations while
driving. When storing a vehicle for
at least a month, remove the tires or
raise the vehicle to reduce the
weight from the tires.
Buying New Tires
GM has developed and matched
specific tires for the vehicle. The
original equipment tires installed
were designed to meet General
Motors Tire Performance Criteria
Specification (TPC Spec)
system rating. When
replacement tires are needed,
GM strongly recommends
buying tires with the same TPC
Spec rating.
GM's exclusive TPC Spec
system considers over a dozen
critical specifications that impact
the overall performance of the
vehicle, including brake system
performance, ride and handling,
traction control, and tire
pressure monitoring
performance. GM's TPC Spec
number is molded onto the tire's
sidewall near the tire size. If the
tires have an all-season tread
design, the TPC Spec number
will be followed by MS for mud
and snow. See
Tire Sidewall
Labeling 0401 for additional
information.
GM recommends replacing worn
tires in complete sets of four (six
for dual rear wheels). Uniform
tread depth on all tires will help
to maintain the performance of
the vehicle. Braking and
handling performance may be
adversely affected if all the tires
are not replaced at the same
time. If proper rotation and
maintenance have been done,
all four tires (six for dual rear
wheels) should wear out at
about the same time.

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Vehicle Care 419
Spec rated tires are installed.
SeeTire Pressure Monitor
System 0409.
The Tire and Loading
Information label indicates the
original equipment tires on the
vehicle. See Vehicle Load Limits
0 269 for the label location and
more information about the Tire
and Loading Information label.
Different Size Tires and
Wheels
If wheels or tires are installed that
are a different size than the original
equipment wheels and tires, vehicle
performance, including its braking,
ride and handling characteristics,
stability, and resistance to rollover
may be affected. If the vehicle has
electronic systems such as antilock
brakes, rollover airbags, roll bars,
traction control, electronic stability
control, or All-Wheel Drive, the
performance of these systems can
also be affected.
{Warning
If different sized wheels are used,
there may not be an acceptable
level of performance and safety if
tires not recommended for those
wheels are selected. This
increases the chance of a crash
and serious injury. Only use GM
specific wheel and tire systems
developed for the vehicle, and
have them properly installed by a
GM certified technician.
See Buying New Tires 0417 and
Accessories and
Modifications 0356.
Uniform Tire Quality
Grading
The following information relates
to the system developed by the
United States National Highway
Traffic Safety Administration
(NHTSA), which grades tires by
treadwear, traction, and
temperature performance. This applies only to vehicles sold in
the United States. The grades
are molded on the sidewalls of
most passenger car tires. The
Uniform Tire Quality Grading
(UTQG) system does not apply
to deep tread, winter tires,
compact spare tires, tires with
nominal rim diameters of
10 to 12 inches (25 to 30 cm),
or to some limited-production
tires.
While the tires available on
General Motors passenger cars
and light trucks may vary with
respect to these grades, they
must also conform to federal
safety requirements and
additional General Motors Tire
Performance Criteria (TPC)
standards.

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Vehicle Care 421
Wheel Alignment and Tire
Balance
The tires and wheels were aligned
and balanced at the factory to
provide the longest tire life and best
overall performance. Adjustments to
wheel alignment and tire balancing
are not necessary on a regular
basis. Consider an alignment check
if there is unusual tire wear or the
vehicle is significantly pulling to one
side or the other. Some slight pull to
the left or right, depending on the
crown of the road and/or other road
surface variations such as troughs
or ruts, is normal. If the vehicle is
vibrating when driving on a smooth
road, the tires and wheels may need
to be rebalanced. See your dealer
for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent,
cracked, or badly rusted or
corroded. If wheel nuts keep coming
loose, the wheel, wheel bolts and
wheel nuts should be replaced.
If the wheel leaks air, replace it.Some aluminum wheels can be
repaired. See your dealer if any of
these conditions exist.
Your dealer will know the kind of
wheel that is needed.
Each new wheel should have the
same load-carrying capacity,
diameter, width, offset and be
mounted the same way as the one it
replaces.
Replace wheels, wheel bolts, wheel
nuts, or Tire Pressure Monitor
System (TPMS) sensors with new
GM original equipment parts.
{Warning
Using the wrong replacement
wheels, wheel bolts, or wheel
nuts can be dangerous. It could
affect the braking and handling of
the vehicle. Tires can lose air,
and cause loss of control, causing
a crash. Always use the correct
wheel, wheel bolts, and wheel
nuts for replacement.
Caution
The wrong wheel can also cause
problems with bearing life, brake
cooling, speedometer or
odometer calibration, headlamp
aim, bumper height, vehicle
ground clearance, and tire or tire
chain clearance to the body and
chassis.
Whenever a wheel, wheel bolt,
or wheel nut is replaced on a dual
wheel setup, check the wheel nut
torque after 160,1 600, and
10 000 km (100,1,000, and
6,000 mi) of driving. For proper
torque, see “Wheel Nut Torque”
under Capacities and
Specifications 0468.
See If a Tire Goes Flat 0423 for
more information.

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Service and Maintenance 461
.To avoid break-down or failure to
start the vehicle, maintain a
battery with full cranking power.
. Trained dealer technicians have
the diagnostic equipment to test
the battery and ensure that the
connections and cables are
corrosion-free.
Belts
. Belts may need replacing if they
squeak or show signs of
cracking or splitting.
. Trained dealer technicians have
access to tools and equipment
to inspect the belts and
recommend adjustment or
replacement when necessary.
Brakes
Brakes stop the vehicle and are
crucial to safe driving.
. Signs of brake wear may include
chirping, grinding, or squealing
noises, or difficulty stopping. .
Trained dealer technicians have
access to tools and equipment
to inspect the brakes and
recommend quality parts
engineered for the vehicle.
Fluids
Proper fluid levels and approved
fluids protect the vehicle’s systems
and components. See
Recommended Fluids and
Lubricants 0463 for GM approved
fluids.
. Engine oil and windshield
washer fluid levels should be
checked at every fuel fill.
. Instrument cluster lights may
come on to indicate that fluids
may be low and need to be
filled.
Hoses
Hoses transport fluids and should
be regularly inspected to ensure
that there are no cracks or leaks.
With a multi-point inspection, your
dealer can inspect the hoses and
advise if replacement is needed. Lamps
Properly working headlamps,
taillamps, and brake lamps are
important to see and be seen on
the road.
.
Signs that the headlamps need
attention include dimming, failure
to light, cracking, or damage.
The brake lamps need to be
checked periodically to ensure
that they light when braking.
. With a multi-point inspection,
your dealer can check the lamps
and note any concerns.
Shocks and Struts
Shocks and struts help aid in control
for a smoother ride.
. Signs of wear may include
steering wheel vibration, bounce/
sway while braking, longer
stopping distance, or uneven
tire wear.
. As part of the multi-point
inspection, trained dealer
technicians can visually inspect
the shocks and struts for signs

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
496 Index
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 356
Accessory Power . . . . . . . . . . . . . . . 281
Active Fuel Management
®. . . . . . 285
Add-On Electrical Equipment . . . 349
Adding a Snow Plow or Similar Equipment . . . . . . . . . . . . . 349
Additional Information OnStar
®. . . . . . . . . . . . . . . . . . . . . . 490
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . . 460
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . . . . . 277
Adjustments Lumbar, Front Seats . . . . . . . . . . . . 58
Agreements Trademarks and License . . . . . 240
Air Cleaner/Filter, Engine . . . . . . . 370
Air Filter, Passenger
Compartment . . . . . . . . . . . . . . . . . 254
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 253
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . . . 86
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . . . 77
Passenger Sensing System . . . . 80 Airbag System (cont'd)
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 77
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 77
When Should an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 75
Where Are the Airbags? . . . . . . . . 74
Airbags
Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . . . 85
Light On-Off . . . . . . . . . . . . . . . . . . 138
On-Off Light . . . . . . . . . . . . . . . . . . 138
On-Off Switch . . . . . . . . . . . . . . . . . . 78
Passenger Status Indicator . . . 139
Readiness Light . . . . . . . . . . . . . . 137
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . . . 85
System Check . . . . . . . . . . . . . . . . . . 72
Alarm Vehicle Security . . . . . . . . . . . . . . . . 42
All-Season Tires . . . . . . . . . . . . . . . . 400
All-Terrain Tires . . . . . . . . . . . . . . . . . 401
AM-FM Radio . . . . . . . . . . . . . . 193, 195
Antenna Fixed Mast . . . . . . . . . . . . . . . . . . . 199
Multi-band . . . . . . . . . . . . . . . . . . . . 199
Antilock Brake System (ABS) . . . 300

GMC Sierra Owner Manual (GMNA-Localizing-U.S./Canada/Mexico-
9234758) - 2016 - crc - 11/9/15
Index 497
Antilock Brake System(ABS) (cont'd)
Warning Light . . . . . . . . . . . . . . . . . 143
Appearance Care
Exterior . . . . . . . . . . . . . . . . . . . . . . . 444
Interior . . . . . . . . . . . . . . . . . . . . . . . . 449
Apple CarPlay and Android Auto . . . . . . . . . . . . . . . . . . 232
Assistance Program,
Roadside . . . . . . . . . . . . . . . . . . . . . . 476
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . . 312
Assistance Systems for
Parking and Backing . . . . . . . . . . 309
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . 210
Theft-Deterrent Feature . . . . . . . 185
Audio Players
CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Automatic Dimming Mirrors . . . . . . . . . . . . . . . . 48
Door Locks . . . . . . . . . . . . . . . . . . . . . 39
Headlamp System . . . . . . . . . . . . 177
Transmission . . . . . . . . . . . . . . . . . 286
Transmission Fluid . . . . . . 367, 370
Automatic Transmission Manual Mode . . . . . . . . . . . . . . . . . 289 Automatic Transmission (cont'd)
Shift Lock Control Function
Check . . . . . . . . . . . . . . . . . . . . . . . 386
Auxiliary
Roof Mounted Lamp . . . . . . . . . . 180
Auxiliary Jack . . . . . . . . . . . . . . . . . . . 209
Axle, Front . . . . . . . . . . . . . . . . . . . . . . 383
Axle, Rear . . . . . . . . . . . . . . . . . . . . . . 384
B
Battery Load Management . . . . . . . . . . . . 182
Power Protection . . . . . . . . . . . . . 183
Voltage and ChargingMessages . . . . . . . . . . . . . . . . . . . 153
Battery - North America . . . . 382, 434
Blade Replacement, Wiper . . . . . 387
Blind Spot Mirrors . . . . . . . . . . . . . . . 48
Bluetooth Overview . . . . . . . . 218, 219, 223, 228
Bluetooth Audio . . . . . . . . . . . . . . . . 210
Brake
Pedal and AdjustableThrottle . . . . . . . . . . . . . . . . . . . . . . 277
System Warning Light . . . . . . . . 142
Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . 380 Antilock . . . . . . . . . . . . . . . . . . . . . . . 300
Assist . . . . . . . . . . . . . . . . . . . . . . . . . 302 Brakes (cont'd)
Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . 380
Parking . . . . . . . . . . . . . . . . . . . . . . . 301
System Messages . . . . . . . . . . . . 154
Braking . . . . . . . . . . . . . . . . . . . . . . . . . 258
Break-In, New Vehicle . . . . . . . . . . 277
Bulb Replacement . . . . . . . . . . . . . . 391 Center High-MountedStoplamp (CHMSL) and
Cargo Lamp . . . . . . . . . . . . . . . . . 390
Halogen Bulbs . . . . . . . . . . . . . . . . 388
Headlamp Aiming . . . . . . . . . . . . . 388
Headlamps . . . . . . . . . . . . . . . . . . . 388
High Intensity Discharge (HID) Lighting . . . . . . . . . . . . . . . 388
Taillamps, Turn Signal, Stoplamps, and Back-up
Lamps . . . . . . . . . . . . . . . . . . . . . . 389
Buying New Tires . . . . . . . . . . . . . . . 417
C
Calibration . . . . . . . . . . . . . . . . . . . . . . 125
California Fuel Requirements . . . . . . . . . . . 318