I recently bought a 2004 Silverado 2500HD crew cab with the 6.0 gas In it. I has a regency badge on the side behind the back window where the trim model would be. It also has a 6” pro comp lift on 35s with 20” alloy ion rims on it along with a true dual exhaust with “regency” engraved on the tips. It has a sprayed bed liner and that’s about all that stands out. I’ve heard of regency and know that they are Texas based and they usually have an interior package and a banner across the window. (Which mine doesn’t). I’ve also only seen it with 1/2 ton trucks and single cabs, I’ve never seen a 3/4 ton I guess. Was just wondering if anyone here has any more info about them?