Chevy changed almost everything in the 3/4 and 1 ton line up in 2020. I do not think you would have trouble with the 992 on your truck. You may want to adopt the technique of raising the camper a little higher when backing in though. Lots of youtube videos that illustrate this.
Worst case you need to shim the camper higher by adding plywood in the bed and possibly shim the camper backwards by adding plywood at the front of the bed. Don't forget that the standard trailer plug in your truck has to be adapted to work with Lance (which uses a different plug).
On my 2004 2500 I got the parts to extend the SAT antenna out to the front of my truck hood but never installed it. I might try that again. I'll post if I do that.