2015 GMC SIERRA 1500 seat adjustment

Black plate (4,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-4 Seats and Restraints
Power Seat Adjustment
To adjust a power seat, if equipped:
.Move the seat forward or
rearward by sliding the control
forward or rearward.
.If equipped, raise or lower the
front part of the seat cushion by
moving the front of the control
up or down.
.If equipped, raise or lower the
seat by moving the rear of the
control up or down.To adjust the seatback, see
Reclining Seatbacks on page 3-5.
To adjust the lumbar support, see
Lumbar Adjustment on page 3-4.
Some vehicles are equipped with a
feature that activates a vibrating
pulse alert in the driver seat to help
the driver avoid crashes. See
Driver
Assistance Systems on page 9-56.
Lumbar Adjustment
Manual Lumbar
If equipped, move the lever up or
down repeatedly to increase or
decrease lumbar support.
Power Lumbar
To adjust the power lumbar support,
if equipped:
.Press and hold the control
forward to increase or rearward
to decrease upper and lower
lumbar support at the same time.

Black plate (16,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-16 Seats and Restraints
To unlatch the belt, push the button
on the buckle. The belt should
return to its stowed position.
Before a door is closed, be sure the
safety belt is out of the way. If a
door is slammed against a safety
belt, damage can occur to both the
safety belt and the vehicle.
Shoulder Belt Height Adjuster
The vehicle has a shoulder belt
height adjuster for the driver and
front outboard passenger.Adjust the height so the shoulder
portion of the belt is on the shoulder
and not falling off of it. The belt
should be close to, but not
contacting, the neck. Improper
shoulder belt height adjustment
could reduce the effectiveness of
the safety belt in a crash. See
How
to Wear Safety Belts Properly on
page 3-13.Push down on the release button to
move the height adjuster to the
desired position.
Move the adjuster up by pushing up
on the shoulder belt guide. After the adjuster is set to the
desired position, try to move it down
without pushing the release button
to make sure it has locked into
position.
Safety Belt Pretensioners
This vehicle has safety belt
pretensioners for front outboard
occupants. Although the safety belt
pretensioners cannot be seen, they
are part of the safety belt assembly.
They can help tighten the safety
belts during the early stages of a
moderate to severe frontal, near
frontal, or rear crash if the threshold
conditions for pretensioner
activation are met. And, if your
vehicle has side impact airbags,
safety belt pretensioners can help
tighten the safety belts in a side
crash. If the vehicle has rollover
roof-rail airbags, safety belt
pretensioners can help tighten the
safety belts in a rollover event.
Pretensioners work only once. If the
pretensioners activate in a crash,
they will need to be replaced, and

Black plate (18,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
3-18 Seats and Restraints
4. Be sure that the belt is nottwisted and it lies flat. The
elastic cord must be under the
belt and the guide on top.
5. The elastic cord on the comfort guide is adjustable. Make it
longer or shorter by squeezing
both ends of the plastic adjuster
and pulling on the elastic cord or
the guide.
6. Adjust the guide so the shoulder portion of the belt is on the
shoulder and not falling off of it.
The belt should be close to, but
not contacting, the neck. Improper comfort guide
adjustment could reduce the
effectiveness of the safety belt in
a crash.
{Warning
A safety belt that is not properly
worn may not provide the
protection needed in a crash. The
person wearing the belt could be
seriously injured. The shoulder
belt should go over the shoulder
and across the chest. These parts
of the body are best able to take
belt restraining forces.
7. Buckle and position the safety
belt as described previously in
this section. Make sure that the
shoulder belt crosses the
shoulder.
To remove and store the comfort
guide, squeeze the belt edges
together so that the safety belt can
be removed from the guide. Unhook
the guide from the loop on the seat.
Store the guide in a convenient
place like the glove box for the next
time it is needed.

Black plate (24,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
9-24 Driving and Operating
Caution (Continued)
broken in. Hard stops with
new linings can mean
premature wear and earlier
replacement. Follow this
breaking-in guideline every
time you get new brake
linings.
.Do not tow a trailer during
break-in. SeeTrailer Towing
on page 9-72 for the trailer
towing capabilities of the
vehicle and more information.
Following break-in, engine speed
and load can be gradually
increased.
Adjustable Throttle and
Brake Pedal
If equipped, the position of the
throttle and brake pedals can be
changed. No adjustment to the pedals can be
made when the vehicle is in
R (Reverse) or while using cruise
control.
The switch used to adjust the
pedals is on the center stack, below
the climate controls.
Lift the switch up to move the
pedals closer to your body. Press
the switch down to move the
pedals away.
Before you start driving, fully press
the brake pedal to confirm the
adjustment is right for you. While
driving, make only small
adjustments.
The vehicle may have a memory
function, which lets pedal settings
be saved and recalled. See
Memory
Seats on page 3-6.
Ignition Positions
The ignition switch has four different
positions.

Black plate (1,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
INDEX i-1
A
Accessories andModifications . . . . . . . . . . . . . . . . . 10-3
Accessory Power . . . . . . . . . . . . . . 9-28
Active Fuel Management
®. . . . . 9-31
Add-On Electrical Equipment . . . . . . . . . . . . . . . . . . . 9-97
Adding a Snow Plow or Similar Equipment . . . . . . . . . . . . 9-97
Additional Information OnStar
®. . . . . . . . . . . . . . . . . . . . . . 14-6
Additional Maintenance and Care . . . . . . . . . . . . . . . . . . . . . 11-9
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . . . . 9-24
Adjustments
Lumbar, Front Seats . . . . . . . . . . . 3-4
Air Cleaner/Filter, Engine . . . . . 10-17
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 8-9
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 8-8 Airbag System
Check . . . . . . . . . . . . . . . . . . . . . . . . 3-36
How Does an Airbag
Restrain? . . . . . . . . . . . . . . . . . . . 3-27
Passenger Sensing System . . . . . . . . . . . . . . . . . . . . . . 3-30
What Makes an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . 3-26
What Will You See after an Airbag Inflates? . . . . . . . . . . . . . 3-27
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . 3-25
Where Are the Airbags? . . . . . . 3-23
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . 3-35
Light On-Off . . . . . . . . . . . . . . . . . . 5-18
On-Off Light . . . . . . . . . . . . . . . . . . 5-18
On-Off Switch . . . . . . . . . . . . . . . . 3-28
Passenger Status Indicator . . . 5-20
Readiness Light . . . . . . . . . . . . . . 5-18
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . 3-35
System Check . . . . . . . . . . . . . . . . 3-21
Alarm
Vehicle Security . . . . . . . . . . . . . . 2-11 All-Season Tires . . . . . . . . . . . . . . 10-51
All-Terrain Tires . . . . . . . . . . . . . . . 10-52
AM-FM Radio . . . . . . . . . . . . . . . . . . . 7-8
Antenna
Multi-band . . . . . . . . . . . . . . . . . . . . 7-11
Antilock Brake System (ABS) . . . . . . . . . . . . . . . . 9-47
Warning Light . . . . . . . . . . . . . . . . . 5-25
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . 10-98
Interior . . . . . . . . . . . . . . . . . . . . . 10-103
Assistance Program, Roadside . . . . . . . . . . . . . . . . . . . . . 13-5
Assistance Systems for Driving . . . . . . . . . . . . . . . . . . . . . . . 9-59
Assistance Systems for
Parking and Backing . . . . . . . . . 9-56
Audio Bluetooth . . . . . . . . . . . . . . . . . . . . . 7-21
Audio Players . . . . . . . . . . . . . . . . . 7-15 CD . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-15
Audio System Fixed Mast Antenna . . . . . . . . . . 7-11
Radio Reception . . . . . . . . . . . . . . 7-11
Theft-Deterrent Feature . . . . . . . . 7-2

Black plate (5,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
INDEX i-5
F
FanEngine . . . . . . . . . . . . . . . . . . . . . . 10-25
Fast Idle System . . . . . . . . . . . . . . . 9-27
Features Memory . . . . . . . . . . . . . . . . . . . . . . . 1-10
Filter,
Engine Air Cleaner . . . . . . . . . 10-17
Flash-to-Pass . . . . . . . . . . . . . . . . . . . 6-3
Flashers, Hazard Warning . . . . . . 6-4
Flat Tire . . . . . . . . . . . . . . . . . . . . . . 10-75 Changing . . . . . . . . . . . . . . . . . . . 10-77
FlexFuel E85 . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-66
Floor Console Storage . . . . . . . . . . 4-4
Floor Mats . . . . . . . . . . . . . . . . . . .10-106
Fluid Automatic Transmission . . . . 10-14
Brakes . . . . . . . . . . . . . . . . . . . . . . 10-29
Four-Wheel DriveTransfer Case . . . . . . . . . . . . . . . 9-38
Power Steering . . . . . . . . . . . . . 10-26
Washer . . . . . . . . . . . . . . . . . . . . . 10-27
Fog Lamps Bulb Replacement . . . . . . 6-5, 10-38
Folding Mirrors . . . . . . . . . . . . . . . . 2-15 Forward Collision Alert
(FCA) System . . . . . . . . . . . . . . . . 9-59
Four-Wheel Drive . . . . . . . 9-38, 10-31
Four-Wheel-Drive Light . . . . . . . . 5-25
Frequency Statement Radio . . . . . . . . . . . . . . . . . . . . . . . 13-12
Front Axle . . . . . . . . . . . . . . . . . . . . 10-32
Front Fog Lamp
Light . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29
Front Seats Adjustment . . . . . . . . . . . . . . . . . . . . 3-3
Heated and Cooled . . . . . . . . . . . . 3-8
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-64 Additives . . . . . . . . . . . . . . . . . . . . . 9-65
Economy Driving . . . . . . . . . . . . . 1-29
Filling a Portable FuelContainer . . . . . . . . . . . . . . . . . . . 9-68
Filling the Tank . . . . . . . . . . . . . . . 9-67
Foreign Countries . . . . . . . . . . . . 9-65
Gauge . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Low Fuel Warning Light . . . . . . . 5-28
Management, Active . . . . . . . . . . 9-31
Requirements, California . . . . . 9-65
System Messages . . . . . . . . . . . . 5-38
Full-Size Spare Tire . . . . . . . . . . 10-87 Fuses . . . . . . . . . . . . . . . . . . . . . . . . 10-41
Engine Compartment
Fuse Block . . . . . . . . . . . . . . . . 10-42
Instrument Panel Fuse Block . . . . . . . . . 10-46, 10-48
G
Garage Door Opener . . . . . . . . . . 5-52Programming . . . . . . . . . . . . . . . . . 5-52
Gauges Engine CoolantTemperature . . . . . . . . . . . . . . . . 5-16
Engine Oil Pressure . . . . . . . . . . 5-15
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 5-14
Odometer . . . . . . . . . . . . . . . . . . . . . 5-13
Speedometer . . . . . . . . . . . . . . . . . 5-13
Tachometer . . . . . . . . . . . . . . . . . . . 5-13
Trip Odometer . . . . . . . . . . . . . . . . 5-13
Voltmeter . . . . . . . . . . . . . . . . . . . . . 5-16
Warning Lights and
Indicators . . . . . . . . . . . . . . . . . . . . 5-9
General Information Service and Maintenance . . . . . 11-1
Towing . . . . . . . . . . . . . . . . . . . . . . . . 9-69
Vehicle Care . . . . . . . . . . . . . . . . . . 10-2

Black plate (7,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
INDEX i-7
L
Labeling, Tire Sidewall . . . . . . . . 10-53
LampsAuxiliary RoofMounted Lamp . . . . . . . . . . . . . . . 6-5
Cargo . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Daytime Running (DRL) . . . . . . . 6-3
Dome . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Exterior Controls . . . . . . . . . . . . . . . 6-1
Exterior Lamps Off Reminder . . . . . . . . . . . . . . . . . . . . 6-2
License Plate . . . . . . . . . . . . . . . 10-40
Malfunction Indicator . . . . . . . . . 5-22
Messages . . . . . . . . . . . . . . . . . . . . 5-39
On Reminder . . . . . . . . . . . . . . . . . 5-29
Reading . . . . . . . . . . . . . . . . . . . . . . . 6-7
Taillamps . . . . . . . . . . . . . . . . . . . 10-39
Lane Departure Warning (LDW) . . . . . . . . . . . . . . . 9-62
Lane Departure Warning
Light . . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . 3-19
Lap-Shoulder Belt . . . . . . . . . . . . . 3-14
LATCH System Replacing Parts after a
Crash . . . . . . . . . . . . . . . . . . . . . . . 3-57 LATCH, Lower Anchors and
Tethers for Children . . . . . . . . . . 3-45
LED Lighting . . . . . . . . . . . . . . . . . . 10-37
Light Hill Decent Control . . . . . . . . . . . 5-26
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Illumination Control . . . . . . . . . . . . 6-6
LED . . . . . . . . . . . . . . . . . . . . . . . . 10-37
Lights
Airbag On-Off . . . . . . . . . . . . . . . . . 5-18
Airbag Readiness . . . . . . . . . . . . . 5-18
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . 5-25
Brake System Warning . . . . . . . 5-24
Charging System . . . . . . . . . . . . . 5-21
Cruise Control . . . . . . . . . . . . . . . . 5-29
Flash-to-Pass . . . . . . . . . . . . . . . . . . 6-3
Four-Wheel-Drive . . . . . . . . . . . . . 5-25
Front Fog Lamp . . . . . . . . . . . . . . 5-29
High-Beam On . . . . . . . . . . . . . . . . 5-29
High/Low Beam Changer . . . . . . 6-2
Lane Departure Warning . . . . . . 5-26
Low Fuel Warning . . . . . . . . . . . . 5-28
Safety Belt Reminders . . . . . . . . 5-17 Lights (cont'd)
Security . . . . . . . . . . . . . . . . . . . . . . 5-28
StabiliTrak®OFF . . . . . . . . . . . . . 5-27
Tire Pressure . . . . . . . . . . . . . . . . . 5-28
Tow/Haul Mode . . . . . . . . . . . . . . . 5-26
Traction Control System
(TCS)/StabiliTrak
®. . . . . . . . . . 5-27
Traction Off . . . . . . . . . . . . . . . . . . . 5-26
Locking Rear Axle . . . . . . . . . . . . . 9-52
Locks
Automatic Door . . . . . . . . . . . . . . . . 2-8
Delayed Locking . . . . . . . . . . . . . . . 2-8
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Lockout Protection . . . . . . . . . . . . . 2-9
Power Door . . . . . . . . . . . . . . . . . . . . 2-8
Safety . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Loss of Control . . . . . . . . . . . . . . . . . 9-5
Low Fuel Warning Light . . . . . . . . 5-28
Low-Profile Tires . . . . . . . . . . . . . . 10-52
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . 3-45
Lumbar Adjustment . . . . . . . . . . . . . 3-4
Front Seats . . . . . . . . . . . . . . . . . . . . 3-4

Black plate (9,1)GMC Sierra Owner Manual (GMNA Localizing-U.S/Canada/Mexico-
7299746) - 2015 - crc - 11/11/13
INDEX i-9
OnStar . . . . . . . . . . . . . . . . . . . . . . . 13-15
OnStar®
System, In Brief . . . . . . . . . . . . . . 1-30
OnStar®Additional
Information . . . . . . . . . . . . . . . . . . . 14-6
OnStar
®Connections . . . . . . . . . . 14-4
OnStar®Emergency . . . . . . . . . . . 14-2
OnStar®Navigation . . . . . . . . . . . . 14-3
OnStar®Overview . . . . . . . . . . . . . 14-1
OnStar®Security . . . . . . . . . . . . . . 14-3
OnStar®Vehicle
Diagnostics . . . . . . . . . . . . . . . . . . 14-6
Operating Mode Overheated EngineProtection . . . . . . . . . . . . . . . . . 10-25
Ordering
Service Publications . . . . . . . . .13-11
Outlets Power . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Overheated Engine Protection
Operating Mode . . . . . . . . . . . . . 10-25
Overheating, Engine . . . . . . . . . . 10-23
Overview, Infotainment System . . . . . . . . . . . . . . . . . . . . . . . . 7-2
P
Pandora Internet Radio . . . . . . . . 7-12
Park
Shifting Into . . . . . . . . . . . . . . . . . . . 9-29
Shifting Out of . . . . . . . . . . . . . . . . 9-31
Parking Brake . . . . . . . . . . . . . . . . . . . . . . . . . 9-48
Brake and P (Park)
Mechanism Check . . . . . . . . 10-36
Over Things That Burn . . . . . . . 9-31
Parking or Backing
Assistance Systems . . . . . . . . . . 9-56
Passenger Airbag Status Indicator . . . . . . . . . . . . . . . . . . . . . 5-20
Passenger Compartment Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Passenger Sensing System . . . 3-30
Perchlorate Materials Requirements, California . . . . . 10-3
Personalization
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 5-45
Phone Bluetooth . . . . . . . . 7-29, 7-31, 7-35, 7-40, 7-44Pickup Conversion to
Chassis Cab . . . . . . . . . . . . . . . . 9-101
Port USB . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18
Power Door Locks . . . . . . . . . . . . . . . . . . . . 2-8
Mirrors . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Outlets . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Protection, Battery . . . . . . . . . . . . . 6-9
Retained Accessory (RAP) . . . 9-28
Seat Adjustment . . . . . . . . . . . . . . . 3-4
Steering Fluid . . . . . . . . . . . . . . . 10-26
Windows . . . . . . . . . . . . . . . . . . . . . 2-18
Pregnancy, Using Safety Belts . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
Privacy
Vehicle Data Recording . . . . . 13-14
Program Courtesy Transportation . . . . . . 13-7
Proposition 65 Warning, California . . . . . . . . . . . . . . . . . . . . . 10-2