Got home yesterday and the trailer hauled great. The EAZ distribution hitch made it a cinch. No sway, no problems. The best haul speed seemed to be about 60 miles an hour, but I did get up near 75.
It seemed to operate best when NOT using cruise control. I wasn't happy with the engine RMP @ 4500, when pulling a hill in cruise control. Without cruise control, RPM at about 3500-3800 would maintain the same speed up hills. Also the lockout for overdrive also brought the RPMs up about 500 RPMs and redued the fule mileage.
Weight of hitch or trailer wasn't an issue with 2004 Chevy Tahoe. After the first 100 miles, I almost forgot I was towing a trailer, except that I had to stop every 200 miles to fill the gas tank.
If and when I shop for a new tow rig, I'm looking for more horsepower and bigger fuel tanks for sure. Perhaps HD Ford F150 or F250 2 wheel drive.