air conditioning GMC YUKON 2009 Get To Know Guide

9
Automatic Climate Controls
(if equipped)
The automatic climate control system
maintains the desired individual temper-
ature for the driver and front seat pas-
senger. The system adjusts the airflow
mode, fan speed, air conditioning and
recirculation functions to reach the set
temperature(s) as quickly as possible.
Automatic Operation
To set the automatic mode:
1. Press the AUTO button.
2. Set the driver’s and front passenger’s
temperature using the + or – temper-
ature buttons.
Manual Operation
To operate the system manually, use the
following controls:
(On/Off):Press this button to turn the
system on or off.
Temperature Control:Press the + or –
temperature button(s) to raise or lower
the temperature setting(s).
(Fan):Press the up or down arrow
to increase or decrease fan speed.
(Mode):Press the up or down but-
ton to change the direction of the airflow
as well as to select the defog mode.
PASS (Passenger Temperature
Control):Press this button to turn off
the passenger temperature setting.
(Recirculation):Press this button
to recirculate inside air through the vehi-
cle. This mode keeps outside air from
entering the vehicle.
(Air Conditioning):Press this but-
ton to turn the air conditioning system
on or off.
AUX or REAR (Rear Climate Control):
Press this button to turn the rear climate
control system on or off.
(Defrost):Press this button to
direct most of the air to the windshield
and some air to the side window outlets.
(Rear Window Defogger):Press
this button to activate the rear window
defogger and the heated outside
rearview mirrors (if equipped). The
defogger and heated mirrors will shut
off automatically or can be turned off
by pressing the button again.
See Section 3 of your Owner Manual.
The rear seat climate control system can
be operated using the front climate con-
trols on the instrument panel or the rear
control panel, which is located near the
2nd-row seats in the headliner or inte-
grated with the Rear Seat Audio (RSA)
controls (if equipped) on the back of the
floor console.
To turn the rear system on or off, press
the AUX or REAR button on the front
control panel. The settings in the rear
will be the same as the driver’s until
they are changed using the rear controls.
Rear Seat Climate Controls
(if equipped)

23
The Oil Life System calculates engine oil
life based on vehicle use and displays
CHANGE ENGINE OIL in the Driver
Information Center (DIC) when it’s nec-
essary to change your engine oil and
filter. The Oil Life System should be reset
to 100% only following an oil change.
Reset the Oil Life System using the DIC:
1. Turn on the ignition.
2. Press the (Vehicle Information)
button until the DIC displays OIL LIFE
REMAINING.
3. Press and hold the (Set/Reset)
button until 100% is displayed.
4. Turn off the ignition.
Reset the Oil Life System without the DIC:
1. Turn on the ignition, with the engine off.
2. Fully press and release the accelera-
tor pedal slowly three times within
five seconds.
3. If the CHANGE ENGINE OIL mes-
sage flashes, the system is reset;
otherwise, repeat the procedure.
4. Turn off the ignition.
See Section 5 of your Owner Manual.
Reset the Engine Oil Life
System
Refueling the Vehicle
To open the fuel door, press the center-
rear edge of the door and it will pop
open slightly. Pull the door to open it
fully.
When closing the fuel door, press the
rear edge of the door until it latches and
is flush with the side of the vehicle.
See Section 5 of your Owner Manual.
Maximizing Fuel Economy
Your driving behavior is a big contributor
to your vehicle’s fuel economy.
Modifying your driving habits will
improve your fuel mileage. Here are
several fuel-saving tips:
• Combine short trips to minimize cold
engine starts, which reduce fuel
economy.
• Avoid quick starts and stops.
Accelerate moderately and drive at a
steady speed.
• Anticipate traffic flow and brake mod-
erately or coast.
• Use the air conditioning and defrost
modes only when necessary.
• Minimize electrical accessory opera-
tion by turning off items such as the
rear defogger and heated seats when
they are not needed.
• Use the remote start feature sparing-
ly. This feature turns the engine on,
consuming fuel at idle.
• Do not warm up the engine by idling.
Even on the coldest days, driving will
help the engine warm up faster.
• Selecting the AUTO feature on 4WD
models will be less economical than
2WD.
• Unload unnecessary cargo to reduce
the amount of weight in the vehicle.
• Regularly check and maintain proper
tire pressure.
• Maintain your vehicle. Regular main-
tenance will keep your vehicle run-
ning cleaner and more efficiently.