Disclaimer: Do not load this much in your Titan, ever. I do not endorse this and only offer these photos as example of what NOT to do.
So, I did load 2400 in the Titan, and I have the Roadmaster Active Suspension. The load is 12 bags of sand, 12 bags of topsoil, and 24 bags of mulch. That was about 1920 pounds based on each bag's weight, then if you add myself, my daughter, gas, and random gear it was around 2400 lbs total.
The Roadmaster Active Suspension bills itself as adding "50% to your payload capacity". That's marketing BS, and honestly I am surprised you can say that in an ad, and even with that I was a bit over the payload + 50% of the payload.
The truck sat much lower, but still had room to spare. I did not bottom out, and it handled fine. Could I tell it was back there? Yes, but it wasn't too bad to be honest. I thought it would feel much different.
Again, don't exceed the payload on your truck's sticker.