Cadillac 2005 SRX Owner's Manual page 192

To program the vehicle to a different mode, use the
following procedure:
1. Enter the personalization portion of the SETUP
menu following the instructions listed previously.
2. Scroll to LIGHTS FLASH AT UNLOCK to highlight it.
3. Press the TUNE/SEL knob to switch back and forth
between on and off.
When the mode is turned on, a check mark will
appear next to the feature name.
The mode you selected is now set. You can either exit
the programming mode by following the instructions
later in this section or program the next feature available
on your vehicle.
Lights Flash at Lock
This feature allows the exterior lamps to flash once
when the remote keyless entry transmitter is used to
lock the vehicle. All doors must be closed for this feature
to work, and the lamps will not flash if the parking
lamps or headlamps are on.
Programmable Modes
Mode 1: ON
Mode 2: OFF
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Before your vehicle was shipped from the factory, it was
programmed to Mode 1. The mode to which the
vehicle was programmed may have been changed since
it left the factory.
To program the vehicle to a different mode, use the
following procedure:
1. Enter the personalization portion of the SETUP
menu following the instructions listed previously.
2. Scroll to LIGHTS FLASH AT LOCK to highlight it.
3. Press the TUNE/SEL knob to switch back and forth
between on and off.
When the mode is turned on, a check mark will
appear next to the feature name.
You can select this feature by itself, or you can combine
it with Horn Sounds At Lock so that both the lights
flash and the horn chirps when you lock your vehicle.
The mode you selected is now set. You can either
exit the programming mode by following the instructions
later in this section or program the next feature
available on your vehicle.