fold seats GMC YUKON 2021 User Guide

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Seats and Restraints 51
5. Stow the mini-latch in the holder in theheadliner.
6. Stow the seat belt in the beltstowage clip.
Repeat the steps to fold the other
seatback, if desired.
Power Seatback Folding (If Equipped)
The vehicle must be in P (Park) for this
feature to work.
1. Second Row Power Seat Fold and Tumble Switches
2. Third Row Power Seat Fold and Raise Switches
1. Press and hold the switch (2) on the sidetrim of the cargo area to fold the third
row seatback.
The left switch folds the left seatback,
and the right switch folds the right
seatback.
2. Repeat the steps for the other seatback, if desired.
The switches (1) can be used to fold or fold
and tumble the second row seats from the
cargo area. See Second Row Seats 046. Returning the Third Row Seatback to the
Upright Position
1. Second Row Power Seat Fold and
Tumble Switches
2. Third Row Power Seat Fold and Raise Switches
To return the third row seatback to the
upright position:

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
52 Seats and Restraints
1. Ensure the seat belt is in the beltstowage clip.
2. Open the liftgate to access the controls for the seat.
3. Press and hold the switch (2) on the side trim of the cargo area to raise the third
row seatback.
The left switch raises the left seatback,
and the right switch raises the right
seatback.
{Warning
A seat belt that is improperly routed, not
properly attached, or twisted will not
provide the protection needed in a crash.
(Continued)
Warning (Continued)
The person wearing the belt could be
seriously injured. After raising the rear
seatback, always check to be sure that
the seat belts are properly routed and
attached, and are not twisted.
4. Reconnect the center seat belt mini-latch to the mini-buckle. Do not let it twist.
5. Pull on the seat belt to be sure the mini-latch is secure.
6. Repeat the steps for the other seatback, if desired.
Manual Seatback Folding (If Equipped)
1. Pull up on the lever to release theseatback.
2. Push the seatback forward to lay flat.
3. Repeat for the other seatback, if necessary.
Returning the Third Row Seatback to the
Upright Position
1. Ensure the seat belt is in the belt stowage clip.
2. From the rear of the vehicle, raise the seatback to the upright position using
the pull strap on the back of the third
row seat, or lift the seatback and push it
into place from inside the vehicle.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
Seats and Restraints 53
{Warning
If either seatback is not locked, it could
move forward in a sudden stop or crash.
That could cause injury to the person
sitting there. Always push and pull on
the seatbacks to be sure they are locked.
3. Push and pull on the seatback to make sure it is locked in place.
{Warning
A seat belt that is improperly routed, not
properly attached, or twisted will not
provide the protection needed in a crash.
The person wearing the belt could be
seriously injured. After raising the rear
seatback, always check to be sure that
the seat belts are properly routed and
attached, and are not twisted.
4. Reconnect the center seat belt mini-latch to the mini-buckle. Do not let it twist.
5. Pull on the seat belt to be sure the mini-latch is secure. Folding the Third Row Seats from the
Overhead Console
To fold the seats from the overhead console,
if equipped:
The vehicle must be in P (Park) for this
feature to work.
1. Press and hold the switch to fold the third row seatback.
The left switch folds the left seatback,
and the right switch folds the right
seatback.
2. Repeat the steps for the other seatback, if desired.
3. Press and hold the switch to return the seatback to the seating position. If the red light on the switch is
illuminated, the third row seatback is not
in the seating position.
There are additional switches which can be
used to fold the third row seatbacks from
the cargo area. See Third Row Seats050.
Seat Belts
This section describes how to use seat belts
properly, and some things not to do.
{Warning
Do not let anyone ride where a seat belt
cannot be worn properly. In a crash,
if you or your passenger(s) are not
wearing seat belts, injuries can be much
worse than if you are wearing seat belts.
You can be seriously injured or killed by
hitting things inside the vehicle harder or
by being ejected from the vehicle. In
addition, anyone who is not buckled up
can strike other passengers in the vehicle.
It is extremely dangerous to ride in a
cargo area, inside or outside of a vehicle.
In a collision, passengers riding in these
areas are more likely to be seriously
(Continued)

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
56 Seats and Restraints
Never wear the shoulder belt under both
arms or behind your back.
Always use the correct buckle for your
seating position.
Never route the lap or shoulder belt over an
armrest.
{Warning
The seat belt can be pinched if it is
routed under plastic trim on the seat,
such as trim around the rear seatback
folding handle or side airbag. In a crash,
pinched seat belts might not be able to
provide adequate protection. Never allow
seat belts to be routed under plastic trim
pieces.
Lap-Shoulder Belt
All seating positions in the vehicle have a
lap-shoulder belt.If you are using a rear seating position with
a detachable seat belt and the seat belt is
not attached, see
Third Row Seats050 for
instructions on reconnecting the seat belt to
the mini-buckle.
The following instructions explain how to
wear a lap-shoulder belt properly.
1. Adjust the seat, if the seat is adjustable, so you can sit up straight. To see how,
see “Seats” in the Index.
2. Pick up the latch plate and pull the belt
across you. Do not let it get twisted.

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
82 Seats and Restraints
{Warning
Children can be seriously injured or
strangled if a shoulder belt is wrapped
around their neck. The shoulder belt can
tighten but cannot be loosened if it is
locked. The shoulder belt locks when it is
pulled all the way out of the retractor.
It unlocks when the shoulder belt is
allowed to go all the way back into the
retractor, but it cannot do this if it is
wrapped around a child’s neck. If the
shoulder belt is locked and tightened
around a child’s neck, the only way to
loosen the belt is to cut it.
Buckle any unused seat belts behind the
child restraint so children cannot reach
them. Pull the shoulder belt all the way
out of the retractor to set the lock, and
tighten the belt behind the child restraint
after the child restraint has been
installed.
Caution
Do not let the LATCH attachments rub
against the vehicle’s seat belts. This may
damage these parts. If necessary, move
buckled seat belts to avoid rubbing the
LATCH attachments.
Do not fold the rear seatback when the
seat is occupied. Do not fold the empty
rear seat with a seat belt buckled. This
could damage the seat belt or the seat.
Unbuckle and return the seat belt to its
stowed position, before folding the seat.
The vehicle is equipped with a front center
airbag in the inboard side of the driver seat.
Even with a front center airbag, a child
restraint can be installed in any second row
seating position.
If you need to secure more than one child
restraint in the rear seat, see Where to Put
the Restraint 076.
1. Attach and tighten the lower attachments to the lower anchors. If the
child restraint does not have lower
attachments or the desired seating
position does not have lower anchors,
secure the child restraint with the seat
belt and top tether when recommended by the child restraint manufacturer. Refer
to your child restraint manufacturer
instructions and the instructions in this
manual.
1.1. Find the lower anchors for the
desired seating position.
1.2. Put the child restraint on the seat.
1.3. Attach and tighten the lower attachments on the child restraint
to the lower anchors.
2. If the child restraint manufacturer recommends that the top tether be
attached, attach and tighten the top
tether to the top tether anchor. Refer to
the child restraint instructions and the
following steps:
2.1. Find the top tether anchor.
2.2. Route, attach, and tighten the top tether according to your child
restraint instructions and the
following instructions:

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./
Canada/Mexico-13690468) - 2021 - crc - 8/14/20
226 Driving and Operating
Warning (Continued)
.Never stack heavier things, like
suitcases, inside the vehicle so
that some of them are above the
tops of the seats.
.Do not leave an unsecured child
restraint in the vehicle.
.When you carry something inside
the vehicle, secure it whenever
you can.
.Do not leave a seat folded down
unless you need to.
There is also important loading
information for off-road driving in this
manual. See “Loading Your Vehicle for
Off-Road Driving” underOff-Road
Driving 0216.
Starting and Operating
New Vehicle Break-In
Caution
The vehicle does not need an elaborate
break-in. But it will perform better in the
long run if you follow these guidelines:
.Keep the vehicle speed at 88 km/h
(55 mph) or less for the first 805 km
(500 mi).
.Do not drive at any one constant
speed, fast or slow, for the first
805 km (500 mi). Do not make
full-throttle starts. Avoid downshifting
to brake or slow the vehicle.
.Avoid making hard stops for the first
322 km (200 mi) or so. During this
time the new brake linings are not yet
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.
(Continued)
Caution (Continued)
.Do not tow a trailer during break-in.
See Trailer Towing 0284 for the
trailer towing capabilities of the
vehicle and more information.
Following break-in, engine speed and load
can be gradually increased.
Ignition Positions
Vehicles equipped with Keyless Access have
pushbutton starting.
The Remote Key must be in the vehicle for
the system to operate. If the pushbutton
start is not working, the vehicle may be
near a strong radio antenna signal causing

GMC Yukon/Yukon XL/Denali Owner Manual (GMNA-Localizing-U.S./Cana-
da/Mexico-13690468) - 2021 - crc - 8/14/20
424 Index
Lights (cont'd)Service Electric Parking Brake . . . . . . . . . . . 113
Tire Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Traction Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
Lock Steering Column . . . . . . . . . . . . . . . . . . . . . . . . 27
Locking Rear Axle . . . . . . . . . . . . . . . . . . . . . . . . 248
Locks
Automatic Door . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Delayed Locking . . . . . . . . . . . . . . . . . . . . . . . . . 17
Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Lockout Protection . . . . . . . . . . . . . . . . . . . . . . . 17
Power Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Loss of Control . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Low Fuel Warning Light . . . . . . . . . . . . . . . . . . 118
Low-Profile Tires . . . . . . . . . . . . . . . . . . . . . . . . . 340
Lower Anchors and Tethers for Children (LATCH System) . . . . . . . . . . . . . . . . .77
Lumbar Adjustment . . . . . . . . . . . . . . . . . . . . . . . 40 Front Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
M
Magnetic Ride Control . . . . . . . . . . . . . . . . . . . 247
MaintenanceRecords . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 395 Maintenance and Care
Additional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 390
Maintenance Schedule . . . . . . . . . . . . . . . . . . . 384 Recommended Fluids andLubricants . . . . . . . . . . . . . . . . . . . . . . . . . . . . 392
Transfer Case . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Malfunction Indicator Lamp . . . . . . . . . . . . . . . 111
Manual Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 235
Map Data Updates . . . . . . . . . . . . . . . . . . . . . . . . 175
Maps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Media
Avoiding Untrusted Devices . . . . . . . . . . . . . 151
Memory Seats . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Messages Engine Power . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Vehicle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Mirror Rear Camera . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Mirrors Automatic Dimming . . . . . . . . . . . . . . . . . . . . 30
Automatic Dimming Rearview . . . . . . . . . . 30
Convex . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Folding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Heated . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Manual Rearview . . . . . . . . . . . . . . . . . . . . . . . 30
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Tilt in Reverse . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Mirrors, Interior Rearview . . . . . . . . . . . . . . . . . 30
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Driver Control . . . . . . . . . . . . . . . . . . . . . . . . . 245
Monitor System, Tire Pressure . . . . . . . . . . . 346
Multi-band Antenna . . . . . . . . . . . . . . . . . . . . . . 151
N
Navigation Connected Services . . . . . . . . . . . . . . . . . . . . 415
Destination . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Using the System . . . . . . . . . . . . . . . . . . . . . . 164
Navigation Symbols . . . . . . . . . . . . . . . . . . . . . 167
Net, Convenience . . . . . . . . . . . . . . . . . . . . . . . . . 93
New Vehicle Break-In . . . . . . . . . . . . . . . . . . . . 226
O
Odometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Trip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Off-Road . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216 Driving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Oil
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Engine Oil Life System . . . . . . . . . . . . . . . . . 316
Engine Oil Pressure Gauge . . . . . . . . . . . . . 107
Pressure Light . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Older Children, Restraints . . . . . . . . . . . . . . . . . . 71
Online Owner Center . . . . . . . . . . . . . . . . . . . . 401
OnStar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409