2007 GMC YUKON XL automatic transmission

Automatic Release Fold and Tumble
Feature
The transmission must be in PARK (P) for this
feature to work.
Folding and Tumbling the Seat(s)
{CAUTION:
Automatically folding and tumbling the
seat, when someone is sitting in the seat,
could cause injury to the person sitting
there. Always make sure there is no one
sitting in the seat before pressing the
automatic seat release button.
To fold and tumble the seat, do the following:
1. Make sure that there is nothing under,
in front of, or on the seat.
Notice:Folding a rear seat with the safety
belts still fastened may cause damage to the
seat or the safety belts. Always unbuckle
the safety belts and return them to their normal
stowed position before folding a rear seat.2. From the front
seats, press one of
the automatic
seat release buttons
located on the
overhead console.
When accessing the third row seats, if your
vehicle has them, from the outside of the
vehicle, press the button on the panel behind
either rear door.
One press of the button automatically folds the
seatback at and tumbles the seat forward.
There will be a slight delay between the folding
of the seatback and the tumbling of the seat.Overhead Console
Buttons shown, Panel
Button similar
24

Automatic Release Fold and Tumble
Feature
The transmission must be in PARK (P) for this
feature to work.
Folding and Tumbling the Seat(s)
{CAUTION:
Automatically folding and tumbling the
seat, when someone is sitting in the seat,
could cause injury to the person sitting
there. Always make sure there is no one
sitting in the seat before pressing the
automatic seat release button.
To fold and tumble the seat, do the following:
1. Make sure that there is nothing under,
in front of, or on the seat.
Notice:Folding a rear seat with the safety
belts still fastened may cause damage to the
seat or the safety belts. Always unbuckle
the safety belts and return them to their normal
stowed position before folding a rear seat.2. From the front
seats, press one of
the automatic
seat release buttons
located on the
overhead console.
When accessing the third row seats, if your
vehicle has them, from the outside of the
vehicle, press the button on the panel behind
either rear door.
One press of the button automatically folds the
seatback at and tumbles the seat forward.
There will be a slight delay between the folding
of the seatback and the tumbling of the seat.Overhead Console
Buttons shown
31

Keys.............................................................111
Remote Keyless Entry System.....................112
Remote Keyless Entry System Operation......113
Doors and Locks.........................................120
Door Locks................................................120
Power Door Locks......................................121
Delayed Locking.........................................121
Programmable Automatic Door Locks.........121
Rear Door Security Locks..........................122
Lockout Protection......................................122
Liftgate/Liftglass..........................................123
Power Liftgate............................................125
Power Running Boards...............................129
Windows......................................................130
Power Windows.........................................131
Sun Visors.................................................132
Theft-Deterrent Systems..............................132
Content Theft-Deterrent..............................132
PASS-Key
®III+..........................................134
PASS-Key®III+ Operation..........................134
Starting and Operating Your Vehicle..........136
New Vehicle Break-In.................................136
Ignition Positions........................................137Retained Accessory Power (RAP)..............138
Starting the Engine.....................................138
Adjustable Throttle and Brake Pedal...........140
Engine Coolant Heater...............................140
Displacement on Demand™ (DoD™)..........141
Automatic Transmission Operation..............142
Tow/Haul Mode..........................................145
Four-Wheel Drive.......................................146
Parking Brake............................................151
Shifting Into Park (P)..................................152
Shifting Out of Park (P)..............................154
Parking Over Things That Burn..................154
Engine Exhaust..........................................155
Running the Engine While Parked..............156
Mirrors..........................................................157
Automatic Dimming Rearview Mirror with
OnStar
®, Compass and Temperature
Display....................................................157
Automatic Dimming Rearview Mirror with
Compass and Temperature Display.........160
Outside Manual Mirrors..............................163
Outside Trailer-Tow Mirrors........................163
Outside Power Mirrors................................164
Section 2 Features and Controls
109

Automatic Transmission Operation
There are several different positions for the
shift lever.
Your vehicle has an automatic transmission with
an electronic shift position indicator within the
instrument panel cluster. This display will show the
position anytime the shift lever is moved out of
PARK (P).
PARK (P):This position locks your rear wheels. It
is the best position to use when you start your
engine because your vehicle cannot move easily.{CAUTION:
It is dangerous to get out of your vehicle
if the shift lever is not fully in PARK (P)
with the parking brake rmly set. Your
vehicle can roll.
Do not leave your vehicle when the engine
is running unless you have to. If you have
left the engine running, the vehicle can
move suddenly. You or others could be
injured. To be sure your vehicle will not
move, even when you are on fairly level
ground, always set your parking brake
and move the shift lever to PARK (P).
SeeShifting Into Park (P) on page 152.If
you are pulling a trailer, seeTowing a
Trailer on page 405.
142

Notice:Spinning the tires or holding the
vehicle in one place on a hill using only
the accelerator pedal may damage the
transmission. If you are stuck, do not spin
the tires. When stopping on a hill, use
the brakes to hold the vehicle in place.
When temperatures are very cold, the Hydra-Matic
Automatic Transmission’s gear shifting may be
delayed providing more stable shifts until the
engine warms up. Shifts may be more noticeable
with a cold transmission. This difference in
shifting is normal.
The transmission torque converter clutch operation
is restricted during cold operation. When the
startup transmission temperature is approximately
64°F (18° C) your torque converter clutch will
temporarily not operate. Once the transmission
temperature rises above 68° F (20° C), normal
operation will resume.Tow/Haul Mode
Your vehicle has a Tow/Haul mode. The selector
button is located on the end of the column
shift lever. You can use this feature to assist when
towing or hauling a heavy load or if there is a
need to charge a battery installed in a trailer.
SeeTowing a Trailer on page 405for more
information.
145

You can choose among four driving settings:
2
m(Two-Wheel Drive High):This setting is
used for driving in most street and highway
situations. Your front axle is not engaged in
two-wheel drive. This setting also provides the
best fuel economy.
AUTO (Automatic Four-Wheel Drive):This
setting is ideal for use when road surface traction
conditions are variable. When driving your
vehicle in AUTO, the front axle is engaged, but
the vehicle’s power is sent only to the rear wheels.
When the vehicle senses a loss of traction, the
system will automatically engage four-wheel drive.
Driving in this mode results in slightly lower fuel
economy than Two-Wheel Drive High.
4
m(Four-Wheel Drive High):Use the
four-wheel high position when you need extra
traction, such as on snowy or icy roads or in most
off-road situations. This setting also engages
your front axle to help drive your vehicle. This is
the best setting to use when plowing snow.
4
n(Four-Wheel Drive Low):This setting also
engages your front axle and delivers extra
torque. You may never need this setting.It sends maximum power to all four wheels.
You might choose Four-Wheel Drive Low if you
are driving off-road in deep sand, deep mud, deep
snow, and while climbing or descending steep
hills. StabiliTrak
®will not engage in this mode.
SeeStabiliTrak®System on page 348for
more information.
{CAUTION:
Shifting the transfer case to NEUTRAL
can cause your vehicle to roll even if the
transmission is in PARK (P). You or
someone else could be seriously injured.
Be sure to set the parking brake before
placing the transfer case in NEUTRAL.
SeeParking Brake on page 151.
NEUTRAL (N):Shift the vehicle’s transfer case
to NEUTRAL only when towing your vehicle.
SeeRecreational Vehicle Towing on page 401or
Towing Your Vehicle on page 400for more
information.
147

Indicator lights in the button will come on to show
which setting you are in. The indicator lights
will come on briey when you turn on the ignition
and one will stay on. If the lights do not come
on, you should take your vehicle to your dealer for
service. An indicator light will ash while shifting
the transfer case. It will remain on when the shift is
complete. If for some reason the transfer case
cannot make a requested shift, it will return to the
last chosen setting.
If the SERVICE 4 WHEEL DRIVE message stays
on, you should take your vehicle to your dealer
for service. See “SERVICE 4 WHEEL DRIVE
message” underDIC Warnings and Messages on
page 254.
Shifting Into Four-Wheel Drive High or
AUTO (Automatic Four-Wheel Drive)
Turn the knob to the Four-Wheel High or AUTO
position. This can be done at any speed,
except when shifting from Four-Wheel Drive Low,
and the indicator light will ash while shifting. It
will remain on when the shift is completed.
Shifting Into Two-Wheel Drive High
Turn the knob to the Two-Wheel High position.
This can be done at any speed, except when
shifting from Four-Wheel Drive Low.
Shifting Into Four-Wheel Drive Low
To shift to the Four-Wheel Drive Low position, the
ignition must be in RUN and the vehicle must
be stopped or moving less than 3 mph (5 km/h)
with the transmission in NEUTRAL (N). The
preferred method for shifting into four-wheel low
is to have your vehicle moving 1 to 2 mph
(1.6 to 3.2 km/h). Turn the knob to the Four-Wheel
Drive Low position. You must wait for the
Four-Wheel Drive Low indicator light to stop
ashing and remain on before shifting your
transmission in gear.
Notice:Shifting the transmission into gear
before the Four-Wheel Low indicator light has
stopped ashing could damage the transfer
case. To help avoid damaging your vehicle,
always wait for the Four-Wheel Low indicator
light to stop ashing before shifting the
transmission into gear.
148

Shifting Out of Park (P)
Automatic Transmission
Your vehicle has an automatic transmission shift
lock control system which locks the shift lever
in PARK (P) when the ignition is in the LOCK
position. You have to fully apply your regular
brakes before you can shift from PARK (P) when
the ignition is in RUN. SeeAutomatic Transmission
Operation on page 142.
If you cannot shift out of PARK (P), ease pressure
on the shift lever and push the shift lever all the
way up into PARK (P) as you maintain brake
application. Then, move the shift lever into
the gear desired.
Parking Over Things That Burn
{CAUTION:
Things that can burn could touch hot
exhaust parts under your vehicle and
ignite. Do not park over papers, leaves,
dry grass, or other things that can burn.
154