Blinking Light next to the radio

I have 2003 Cehvy Silverado half ton pickup truck. There is a red light blinking next to the radio under the dash? What kind of light is that. It blinks when the truck is off or driving. Is this is something a tracker inside the vehicle or something related to the air bag or i dont know why that light is there ? Thanks.
mustish1Asked:
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Tiras25Commented:
I think this is an imitation light you talking about to fool thiefs like there is an alarm inside a vehicle.  Here is a link:

http://www.quasarelectronics.com/4008-12v-flashing-led-imitation-car-alarm.htm 

I might be wrong though..


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Michael-BestCommented:
It is most likely the indicator lamp that your cars security system is turned on and working, and thus warn away any theives or vandals.

Otherwise:
Has this just started?
Is every elecrical item working?
Does your OBD2 show any error code?
Is the light coming from an accessory or from a standard part of the car?
By "under the dash" do you mean out of normal view?
A picture may help us to solve this.

Hpe ths hlps.
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