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D (START): This is the position that starts the engine.
When the engine starts, release the key. The ignition
switch returns to ON/RUN for driving.
A warning tone will sound when the driver door is
opened, the ignition is in ACC/ACCESSORY or LOCK/
OFF and the key is in the ignition.
Retained Accessory Power (RAP)
The following vehicle accessories can be used for up to
10 minutes after the engine is turned off:
.
Audio System
.
Power Windows
.
OnStar
®
System (if equipped)
.
Sunroof (if equipped)
These features work when the key is in ON/RUN or
ACC/ACCESSORY. Once the key is turned from ON/
RUN to LOCK/OFF, the windows and sunroof continue
to work up to 10 minutes until any door is opened. The
radio continues to work for up to 10 minutes or until the
driver door is opened.
Starting the Engine
If the vehicle has the DURAMAX
®
Diesel engine, see
the DURAMAX
®
Diesel manual for more information.
If the vehicle is a Two-mode Hybrid, see the Two-mode
Hybrid manual for more information.
Notice: Do not try to shift to P (Park) if the vehicle is
moving. If you do, you could damage the
transmission. Shift to P (Park) only when the vehicle
is stopped.
Move the shift lever to P (Park) or N (Neutral). The
engine will not start in any other position. To restart the
engine when the vehicle is already moving, use
N (Neutral) only.
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