K3500 no lights at all

[454cid]

Update. It was as simple as flipping a switch. The Blackout kills every single light in the truck.

The "Blackout"? Do you have something aftermarket installed?

Edit: Nevermind, I see now it's an ex-military truck.

 

[stutaeng]

2000 K3500 m1028? I guess it is a CUCV II, as the CUCV was based on the square body 1980s GM trucks and they stopped making them in the late 1980s?
I've never seen a M1028 GMT400, but does look like they made them until 2000: https://publicinsta.com/hashtag/cucv2

Sounds like a sweet set-up. Please post some photos.