What Strobes Can I Have On My Truck Is My Chevy Silverado Firefighter Edition Factory Or Aftermarket?

Is my Chevy Silverado Firefighter edition factory or aftermarket? - what strobes can i have on my truck

I recently bought a 2005 Chevy Silverado. I did not at first, but the Z71 emblem on the rear quarter panels Issue firefighter said. In the car, there are two switches, where a change is as a rule, if you can disable the passenger airbag. A switch to turn the flash lights in the headlights. I do not know what the other switches. It seems as if a siren can be activated when you connect this book. I want to know if a Chevy Silverado Z71 Firefighter Edition or the owner of the buttons and icons installed.