There are knowns and unknowns.
Knowns:
- LT, RST and LTZ names/trims are gone. The new "Silverado" trim level replaces all 3 of those. You should be able to configure the Silverado trim to match the equipment levels of those three trims.
Unknowns:
- Custom. No mention of what engines it will have access to. Dual exhaust being standard does seem to confirm a V8 option for the Custom trim though. My "guess" is that Custom will have access to the Turbomax and the 5.7. I could be wrong though. The current Custom trim went 2.7 Turbomax only the last 4-5 years, and only had a single side exit exhaust.
- 40-20-40. I would imagine that is NOT going away. They only focused on showing the new interior on the top trims, Trail Boss, ZR2 and High Country, hence the images shown are just bucket seats up front.
The info should start coming fairly quickly over the next weeks and months. Production is supposed to start up later this year, so when the order guide launches, you'll be able to see the configurations of engines, cabs, seating, etc.