Suburban 1500 with 6000lbs

I have a 99 Burb K1500, 5.7, 4x4 with 373 gears. I'm also towing just under 6K. It's just me and the wife so I'm ok with payload. Add people to the other seats and it starts to get heavy. It tows fine. On the highway, the engine works to pull the unit through the air, on the back roads under 45 mph, it's very comfortable. Get a good hitch, make sure the trailer brakes are working fully and have fun. I have towed heavier with this rig, and it's alot more work. So yes it's doable as I do it routinely, but it must be set up right to be comfortable.