Towing a 40’ weekend warrior 4005 flt.

OK I’m getting mixed reviews on towing my trailer. I have a 98 2500 Chevy diesel but I don’t plan on hauling it with that since I’m getting rid of it but I’m considering either another 2500 HD or 3500 Can I use a 3-4 ton pull the trailer safely or should I be looking at a 1 ton truck instead?
I’ve been pulling trailers all my life I also drove transfer trucks so I’m not new to towing.