2010 GMC YUKON HYBRID engine

Section 1 In Brief
Initial Drive Information. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Four-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Hybrid Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Hybrid Safety Information . . . . . . . . . . . . . . . . . . . . . . 1-3
Fuel Economy Gage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Automatic Engine Start/Stop Feature . . . . . . . . . . . . 1-4
Regenerative Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Performance and Maintenance . . . . . . . . . . . . . . . . . . . .1-6
Tire Sealant and Compressor Kit . . . . . . . . . . . . . . . . 1-6
1-1

Initial Drive Information
Transmission
Range Selection Mode
The Range Selection Mode switch is located on the
shift lever. To enable the Range Selection feature,
move the column shift lever to the M (Manual) position.The current range will appear next to the M. This is the
highest attainable range with all lower gears accessible.
As an example, when 3 (Third) gear is selected, 1 (First)
through 3 (Third) gears are available.
Press the plus/minus buttons, located on the steering
column shift lever, to select the desired range of
gears for current driving conditions. See Automatic
Transmission Operation in the owner manual.
Cruise control can be used while the vehicle is in
Range Selection Mode.
Four-Wheel Drive
If the vehicle has four-wheel drive, you can send
the engine's driving power to all four wheels for
extra traction. Read the following before using
four-wheel drive.
1-2

Automatic Transfer Case
The transfer case knob is located to the left of the
instrument panel cluster. You can choose among
five driving settings:
2
m(Two-Wheel Drive High):This setting is used for
driving in most street and highway situations.
AUTO (Automatic Four-Wheel Drive) : This setting is
ideal for use when road surface traction conditions are
variable.
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. 4
n(Four-Wheel Drive Low) :
This setting delivers
extra torque. 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.
N (Neutral) : Shift the vehicle's transfer case to
N (Neutral) only when towing the vehicle. See
Recreational Vehicle Towing or Towing Your Vehicle
in the index of the Owner Manual.
See Four-Wheel Drive on page 3‑10.
Hybrid Features
Hybrid Safety Information
This vehicle has a standard 12-volt battery and a
high-voltage hybrid battery. Only a trained service
technician with the proper knowledge and tools should
inspect, test, or replace the hybrid battery. See your
dealer/retailer if the hybrid battery needs service.
The 12-volt battery cables, in the engine compartment,
are clearly labeled. In emergency situations, first
responders can cut those cables to disable the
high-voltage hybrid battery system.
1-3

Fuel Economy Gage
United StatesCanada
This gage shows when the vehicle is operating at a fuel
efficient point.
By modifying driving behavior to increase the economy
time during driving, fuel mileage will be improved.
See Fuel Economy Gage on page 4‑5.
Automatic Engine Start/Stop Feature
Start the engine as you would any other engine.
See“Starting the Engine” in the owner manual for more
information on starting. The hybrid system provides
very quiet engine starting. If pulling a trailer with trailer
brakes, see Towing a Trailer
on page 5‑8for more
information.
Auto Stop
The vehicle has an Auto Stop feature. After a
successful engine start, the engine may turn off and
operate in the Auto Stop mode.
Keep your foot firmly on the brake pedal until you are
ready for the vehicle to move.
Engine OFF and AUTO STOP modes are indicated on
the tachometer display. When the tachometer needle
indicates OFF, the engine is not running and will remain
off until the ignition key is placed in the START position
or a remote vehicle start is performed. When the
tachometer needle indicates AUTO STOP, the hybrid
system is on, the engine is not running, but may Auto
Start at any time without notice. See Tachometer
on
page 4‑4for more information.
1-4

A chime will sound if the driver door is opened while in
Auto Stop as a reminder that the ignition switch is not in
the LOCK/OFF position. Always turn the ignition switch
to LOCK/OFF and remove the key from the ignition
switch when exiting the vehicle.
Auto Start
The vehicle also has an Auto Start feature. The engine
will remain off while in Auto Stop mode until vehicle
conditions require the engine to run. The near-instant
starting of the engine from Auto Stop mode is called
Auto Start.
EV Mode
The vehicle also has an EV mode which uses only
the electric motor to move the vehicle. With light
acceleration, the vehicle will drive in EV mode.
EV mode is unavailable when the vehicle is out of fuel.
See Starting the Vehicle in the Two‐Mode Hybrid
supplement to the owner manual.
Regenerative Braking
Regenerative braking enables the electric drive motor
to operate as a generator when coasting or braking.
Energy from the moving vehicle recharges the hybrid
battery.
The hydraulic disc brakes work with the regenerative
braking to insure effective braking.
The braking system is computer controlled and blends
the regenerative braking with the conventional hydraulic
disc brakes to meet any requirements for deceleration.
Because the controller applies the hydraulic brakes
through its high pressure accumulator, you may
occasionally hear the motor driven pump when it
recharges the system. This is normal. In the event of a
controller problem, the brake pedal may be harder to
push and the stopping distance may be longer.
See Regenerative Braking, Warning Lights, Gages, and
Indicators and Driver Information Center (DIC) in the
owner manual.
1-5

Section 3 Features and Controls
Storage Areas. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Power Outlet Alternating Current . . . . . . . . . . . . . . . . 3-2
Starting and Operating Your Vehicle . . . . . . . . . . . . . .3-3
Starting the Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Automatic Transmission Operation . . . . . . . . . . . . . . 3-6 Four-Wheel Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Shifting Into Park . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Engine Coolant Heater . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Regenerative Braking . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Running the Vehicle While Parked . . . . . . . . . . . . . 3-18
3-1

Starting and Operating Your
Vehicle
Starting the Vehicle
{WARNING:
Exiting the vehicle, without first shifting into
P (Park), may cause the vehicle to move, and you
or others can be seriously injured. Because the
vehicle has the Automatic Engine Start/Stop
feature, the vehicle’s engine might seem to be
shut off when you come to a complete stop.(Continued)
WARNING: (Continued)
However, once the brake pedal is released,
the vehicle can move. The vehicle’s engine can
also restart at any time.
Shift to P (Park) and turn the ignition to
LOCK/OFF, before exiting the vehicle.
Start the engine as you would any other engine.
See “Starting the Engine” in the owner manual for
more information on starting. If pulling a trailer with
trailer brakes, see Towing a Trailer
on page 5‑8for more information.
3-3

Auto Stop
The vehicle has an Auto Stop feature. After a
successful engine start, the engine may turn off and
operate in the Auto Stop mode. Some of the vehicle
conditions that allow the engine to stop running and
enter the Auto Stop mode are:
.Ignition switch is in the ON/RUN position.
.The hood is closed.
.The gear selector is in P (Park), R (Reverse),
N (Neutral) or D (Drive).
.The hybrid battery is at an acceptable state of
charge.
.The hybrid battery voltage, temperature or power
limits are not exceeded. In very hot conditions,
Auto Stop may be unavailable until the hybrid
battery has cooled.
.The engine is at operating temperature.
.The vehicle may enter Auto Stop after a remote
vehicle start.
If you are on an incline, the hybrid drive motor can help
keep the vehicle from rolling backwards, even if the
engine is in Auto Stop. With your foot off the brake and the vehicle on level
ground, the hybrid drive motor may cause the vehicle
to roll slowly forward, even when the engine is in
Auto Stop.
Keep your foot firmly on the brake pedal until you are
ready for the vehicle to move.
Engine OFF and AUTO STOP modes are indicated on
the tachometer display. When the tachometer needle
indicates OFF, the engine is not running and will remain
off until the ignition key is placed in the START position
or a remote vehicle start is performed. When the
tachometer needle indicates AUTO STOP, the hybrid
system is on, the engine is not running, but may Auto
Start at any time without notice. See
Tachometer
on
page 4‑4for more information.
A chime will sound if the driver door is opened while in
Auto Stop as a reminder that the ignition switch is not in
the LOCK/OFF position. Always turn the ignition switch
to LOCK/OFF and remove the key from the ignition
switch when exiting the vehicle.
3-4