Hummer 2008 H2 Owner's Manual page 91

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(Remote Start): Press and release the lock button
and then press and hold the remote start button to
start the vehicle.
To start the vehicle using the remote start feature:
1. Aim the transmitter at the vehicle.
2. Press and release the transmitter's lock button,
then immediately press and hold the transmitter's
remote start button until the turn signal lights flash.
If you cannot see the vehicle's lights, press
and hold the remote start button for at least
four seconds. The vehicle's doors will lock.
Pressing the remote start button again after the
vehicle has started will turn off the ignition.
When the vehicle starts, the parking lamps will turn
on and remain on while the vehicle is running.
3. If it is the first remote start since the vehicle has
been driven, repeat these steps, while the engine
is still running, to extend the engine running time
by 10 minutes. Remote start can be extended
one time.
After entering the vehicle during a remote start, insert
and turn the key to ON/RUN to drive the vehicle.
If the vehicle is left running it will automatically
shut off after 10 minutes unless a time extension
has been done.
To manually shut off a remote start:
•
Aim the RKE transmitter at the vehicle and press
the remote start button until the parking lamps
turn off.
•
Turn on the hazard warning flashers.
•
Turn the ignition switch on and then off.
The vehicle can be remote started two separate times
between driving sequences. The engine will run for
10 minutes after each remote start.
Or, you can extend the engine run time by another
10 minutes within the first 10 minute remote start time
frame, and before the engine stops.
For example, if the lock button and then the remote
start buttons are pressed again after the vehicle
has been running for five minutes, 10 minutes are
added, allowing the engine to run for 15 minutes.
The additional ten minutes are considered a
second remote vehicle start.
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