What Is The Type and Size of the Little Red Bulb on my 2006 Delco Radio?

Hello pushrod, Thanks for your fast reply! Yes I know the light blinks when the truck is off and lock. But the bulb is burnt out in the radio. I was hoping to find out what type and size of the bulb, so I can fix it and get it working again. Would you know what type of bulb I need to replace it with?

It's an led built into the stereo .. Try reprogramming stereo to activate security feature .. See owners manual.

Hey Pushrod, I found the replacement LED. Replace it and now working properly. Thanks for help..