2019 GMC YUKON XL lumbar

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
Seats and Restraints 65
Seats and
Restraints
Head Restraints
Head Restraints . . . . . . . . . . . . . . . 66
Front Seats
Center Seat . . . . . . . . . . . . . . . . . . . . 67
Power Seat Adjustment . . . . . . . . 67
Lumbar Adjustment . . . . . . . . . . . . 68
Reclining Seatbacks . . . . . . . . . . . 69
Memory Seats . . . . . . . . . . . . . . . . . 69
Heated and Ventilated FrontSeats . . . . . . . . . . . . . . . . . . . . . . . . . 72
Rear Seats
Rear Seats . . . . . . . . . . . . . . . . . . . . 74
Heated Rear Seats (IfEquipped) . . . . . . . . . . . . . . . . . . . . 74
Second Row Seats . . . . . . . . . . . . 75
Third Row Seats . . . . . . . . . . . . . . . 79
Seat Belts
Seat Belts . . . . . . . . . . . . . . . . . . . . . 81
How to Wear Seat Belts Properly . . . . . . . . . . . . . . . . . . . . . . 82
Lap-Shoulder Belt . . . . . . . . . . . . . 84
Seat Belt Use During Pregnancy . . . . . . . . . . . . . . . . . . . . 88 Lap Belt . . . . . . . . . . . . . . . . . . . . . . . 89
Seat Belt Extender . . . . . . . . . . . . . 90
Safety System Check . . . . . . . . . . 90
Seat Belt Care . . . . . . . . . . . . . . . . . 90
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . 91
Airbag System
Airbag System . . . . . . . . . . . . . . . . . 91
Where Are the Airbags? . . . . . . . 93
When Should an AirbagInflate? . . . . . . . . . . . . . . . . . . . . . . . 95
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . 96
How Does an Airbag Restrain? . . . . . . . . . . . . . . . . . . . . . 96
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . 97
Passenger Sensing System . . . 98
Servicing the Airbag-Equipped Vehicle . . . . . . . . . . . . . . . . . . . . . . 102
Adding Equipment to the Airbag-Equipped Vehicle . . . . 103
Airbag System Check . . . . . . . . 104
Replacing Airbag System Parts after a Crash . . . . . . . . . . . . . . . . 104
Child Restraints
Older Children . . . . . . . . . . . . . . . . 104
Infants and Young Children . . . 106
Child Restraint Systems . . . . . . 108 Where to Put the Restraint . . . . 110
Lower Anchors and Tethers for
Children (LATCH System) . . . 111
Replacing LATCH System Parts After a Crash . . . . . . . . . 120
Securing Child Restraints (With the Seat Belt in the
Rear Seat) . . . . . . . . . . . . . . . . . . 120
Securing Child Restraints (With the Seat Belt in the Center
Front Seat) . . . . . . . . . . . . . . . . . . 122
Securing Child Restraints (With the Seat Belt in the Front
Passenger Seat) . . . . . . . . . . . . 123

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-12460267) - 2019 - crc - 9/11/18
68 Seats and Restraints
{Warning
The power seats will work with
the ignition off. Children could
operate the power seats and be
injured. Never leave children
alone in the vehicle.
To adjust the seat:
.Move the seat forward or
rearward by sliding the control
forward or rearward. .
Raise or lower the front part of
the seat cushion by moving the
front of the control up or down.
. Raise or lower the seat by
moving the rear of the control up
or down.
To adjust the seatback, see
Reclining Seatbacks 069.
To adjust the lumbar support, see
Lumbar Adjustment 068.
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 0255.
Lumbar Adjustment
To adjust the 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.
. Press and hold the control up to
increase upper lumbar support
and decrease lower lumbar
support.
Press and hold the control down
to increase lower lumbar support
and decrease upper lumbar
support.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
Index 437
IndexA
Accessories andModifications . . . . . . . . . . . . . . . . . . 297
Accessory Power . . . . . . . . . . . . . . . 224
Active Fuel Management . . . . . . . 226
Adaptive Cruise Control . . . . . . . . 248
Add-On Electrical Equipment . . . 294
Additional Information OnStar . . . . . . . . . . . . . . . . . . . . . . . 427
Additional Maintenance
and Care . . . . . . . . . . . . . . . . . . . . . . 401
Adjustable Throttle and Brake Pedal . . . . . . . . . . . . . . . . . . . 216
Adjustments
Lumbar, Front Seats . . . . . . . . . . . . 68
Air Cleaner/Filter, Engine . . . . . . . 309
Air Conditioning . . . . . . . . . . . 191, 195
Air Filter, Passenger Compartment . . . . . . . . . . . . . . . . . 197
Air Vents . . . . . . . . . . . . . . . . . . . . . . . 196
Airbag System Check . . . . . . . . . . . . . . . . . . . . . . . . 104
How Does an AirbagRestrain? . . . . . . . . . . . . . . . . . . . . . 96
Passenger Sensing System . . . . 98
What Makes an Airbag Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 96 Airbag System (cont'd)
What Will You See after an
Airbag Inflates? . . . . . . . . . . . . . . . 97
When Should an Airbag
Inflate? . . . . . . . . . . . . . . . . . . . . . . . . 95
Where Are the Airbags? . . . . . . . . 93
Airbags Adding Equipment to theVehicle . . . . . . . . . . . . . . . . . . . . . . 103
Passenger Status Indicator . . . 152
Readiness Light . . . . . . . . . . . . . . 151
Servicing Airbag-Equipped Vehicles . . . . . . . . . . . . . . . . . . . . . 102
System Check . . . . . . . . . . . . . . . . . . 91
Alarm Vehicle Security . . . . . . . . . . . . . . . . 53
Alert Lane Change . . . . . . . . . . . . . . . . . 264
Side Blind Zone (SBZA) . . . . . . 264
All-Season Tires . . . . . . . . . . . . . . . . 342
All-Terrain Tires . . . . . . . . . . . . . . . . . 343
Antilock Brake System (ABS) . . . 239 Warning Light . . . . . . . . . . . . . . . . . 155
Appearance Care Exterior . . . . . . . . . . . . . . . . . . . . . . . 383
Interior . . . . . . . . . . . . . . . . . . . . . . . . 388
Armrest Storage . . . . . . . . . . . . . . . . 127

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
Index 443
Level ControlAutomatic . . . . . . . . . . . . . . . . . . . . . 245
Liftgate . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Lighting Entry . . . . . . . . . . . . . . . . . . . . . . . . . 188
Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . 188
Illumination Control . . . . . . . . . . . 187
LED . . . . . . . . . . . . . . . . . . . . . . . . . . 326
Lights Airbag Readiness . . . . . . . . . . . . . 151
Antilock Brake System(ABS) Warning . . . . . . . . . . . . . . 155
Brake System Warning . . . . . . . 155
Charging System . . . . . . . . . . . . . 152
Check Engine (Malfunction Indicator) . . . . . . . . . . . . . . . . . . . . 153
Cruise Control . . . . . . . . . . . . . . . . 161
Door Ajar . . . . . . . . . . . . . . . . . . . . . 161
Engine Coolant Temperature Warning . . . . . . . 158
Engine Oil Pressure . . . . . . . . . . 159
Flash-to-Pass . . . . . . . . . . . . . . . . . 184
Four-Wheel-Drive . . . . . . . . . . . . . 156
Front Fog Lamp . . . . . . . . . . . . . . 160
High-Beam On . . . . . . . . . . . . . . . . 160
High/Low Beam Changer . . . . . 183 Lights (cont'd)
Lane Keep Assist . . . . . . . . . . . . . 156
Low Fuel Warning . . . . . . . . . . . . 159
Seat Belt Reminders . . . . . . . . . . 150
Security . . . . . . . . . . . . . . . . . . . . . . 160
StabiliTrak OFF . . . . . . . . . . . . . . . 157
Tire Pressure . . . . . . . . . . . . . . . . . 158
Tow/Haul Mode . . . . . . . . . . . . . . . 156
Traction Control System
(TCS)/StabiliTrak . . . . . . . . . . . . 158
Traction Off . . . . . . . . . . . . . . . . . . . 157
Locking Rear Axle . . . . . . . . . . . . . . 245
Locks Automatic Door . . . . . . . . . . . . . . . . . 45
Delayed Locking . . . . . . . . . . . . . . . . 45
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Lockout Protection . . . . . . . . . . . . . . 46
Power Door . . . . . . . . . . . . . . . . . . . . . 45
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Loss of Control . . . . . . . . . . . . . . . . . 203
Low Fuel Warning Light . . . . . . . . . 159
Low-Profile Tires . . . . . . . . . . . . . . . . 342
Lower Anchors and Tethers for Children (LATCH
System) . . . . . . . . . . . . . . . . . . . . . . . 111
Lumbar Adjustment . . . . . . . . . . . . . . 68 Front Seats . . . . . . . . . . . . . . . . . . . . . 68M
Magnetic Ride Control . . . . . . . . . . 244
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . 407
Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . 401
Maintenance Schedule . . . . . . . . . 395 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . 404
Transfer Case . . . . . . . . . . . . . . . . 234
Malfunction Indicator Lamp . . . . . 153
Manual Mode . . . . . . . . . . . . . . . . . . . 231
Memory Features . . . . . . . . . . . . . . . . 12
Memory Seats . . . . . . . . . . . . . . . . . . . 69
Messages Engine Power . . . . . . . . . . . . . . . . 168
Vehicle . . . . . . . . . . . . . . . . . . . . . . . 168
Vehicle Speed . . . . . . . . . . . . . . . . 169
Mirror
Child-View . . . . . . . . . . . . . . . . . . . . . . 60
Mirrors Automatic Dimming . . . . . . . . . . . . . 58
Automatic DimmingRearview . . . . . . . . . . . . . . . . . . . . . . 60
Blind Spot . . . . . . . . . . . . . . . . . . . . . . 58
Convex . . . . . . . . . . . . . . . . . . . . . . . . . 56
Folding . . . . . . . . . . . . . . . . . . . . . . . . . 57
Heated . . . . . . . . . . . . . . . . . . . . . . . . . 58

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-12460267) - 2019 - crc - 9/11/18
Index 445
R
Radio Frequency Statement . . . . 421
Reading Lamps . . . . . . . . . . . . . . . . . 187
Rear Axle . . . . . . . . . . . . . . . . . . . . . . . 320Locking . . . . . . . . . . . . . . . . . . . . . . . 245
Rear Climate Control System . . . 195
Rear Seats . . . . . . . . . . . . . . . . . . . . . . 74 Heated . . . . . . . . . . . . . . . . . . . . . . . . . 74
Rear Storage . . . . . . . . . . . . . . . . . . . 127
Rear Vision Camera (RVC) . . . . . 256
Rear Window Washer/Wiper . . . . 135
Rearview Mirrors . . . . . . . . . . . . . . . . 60 Automatic Dimming . . . . . . . . . . . . . 60
Reclining Seatbacks . . . . . . . . . . . . . 69
Recommended
Fuel . . . . . . . . . . . . . . . . . . . . . . . . . . 269
Recommended Fluids and Lubricants . . . . . . . . . . . . . . . . . . . . . 404
Records
Maintenance . . . . . . . . . . . . . . . . . . 407
Recreational Vehicle Towing . . . . 378
Reimbursement Program, GM Mobility . . . . . . . . . . . . . . . . . . . 415
Remote Keyless Entry
(RKE) System . . . . . . . . . . 33, 34, 41
Remote Vehicle Start . . . . . . . . . . . . 43
Replacement Glass . . . . . . . . . . . . . . . . . . . . . . . . . 324 Replacement Parts
Airbags . . . . . . . . . . . . . . . . . . . . . . . 104
Maintenance . . . . . . . . . . . . . . . . . . 406
Replacing Airbag System . . . . . . . 104
Replacing LATCH System Parts after a Crash . . . . . . . . . . . . 120
Replacing Seat Belt System
Parts after a Crash . . . . . . . . . . . . . 91
Reporting Safety Defects Canadian Government . . . . . . . . 422
General Motors . . . . . . . . . . . . . . . 422
U.S. Government . . . . . . . . . . . . . 421
Restraints Where to Put . . . . . . . . . . . . . . . . . .110
Retained Accessory Power (RAP) . . . . . . . . . . . . . . . . . . 224
Reverse Tilt Mirrors . . . . . . . . . . . . . . 59
Ride Control Systems Magnetic . . . . . . . . . . . . . . . . . . . . . 244
Roads Driving, Wet . . . . . . . . . . . . . . . . . . 208
Roadside Assistance Program . . . . . . . . . . . . . . . . . . . . . . . 415
Roof Sunroof . . . . . . . . . . . . . . . . . . . . . . . . . 63
Roof Rack System . . . . . . . . . . . . . . 129
Rotation, Tires . . . . . . . . . . . . . . . . . . 355 Routing, Engine Drive Belt . . . . . . 410
Running the Vehicle While
Parked . . . . . . . . . . . . . . . . . . . . . . . . 228
S
Safety Defects ReportingCanadian Government . . . . . . . . 422
General Motors . . . . . . . . . . . . . . . 422
U.S. Government . . . . . . . . . . . . . 421
Safety Locks . . . . . . . . . . . . . . . . . . . . . 46
Safety System Check . . . . . . . . . . . . 90
Scheduling Appointments . . . . . . . 417
Seat Belts . . . . . . . . . . . . . . . . . . . . . . . 81 Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Extender . . . . . . . . . . . . . . . . . . . . . . . . 90
How to Wear Seat BeltsProperly . . . . . . . . . . . . . . . . . . . . . . . 82
Lap Belt . . . . . . . . . . . . . . . . . . . . . . . . 89
Lap-Shoulder Belt . . . . . . . . . . . . . . 84
Reminders . . . . . . . . . . . . . . . . . . . . 150
Replacing after a Crash . . . . . . . . 91
Use During Pregnancy . . . . . . . . . . 88
Seats Center Seat . . . . . . . . . . . . . . . . . . . . 67
Head Restraints . . . . . . . . . . . . . . . . 66
Heated and Ventilated Front . . . . 72
Heated, Rear . . . . . . . . . . . . . . . . . . . 74
Lumbar Adjustment, Front . . . . . . 68