DJ Dannis in the house 
Check out DJ Dannis he tows an atv with his and its not a lightweight race atv
I know this thread is a month old, but I just stumbled across it... Thanks for the pointer speedwrench. Let me just say that I am very picky about my GTO and would say no if I knew anything would cause or be causing damage. Before I bought the hitch, I even bought used rear tail lights with the wiring harnesses, along with the replacement black plastic that must be trimmed underneath by the hitch, so that I can restore to stock again. This is my ONLY mod. Deciding to get a trailer hitch was like deciding to have a baby
. So I did some tests with a vacuum guage and did comparisons of the readings with and without a trailer. The results were a minimal 2-4 inches of vacuum lost. Not a big deal. As you can see in my display pic, I do occasionally tow my (roughly) 670 pound atv. Works great! Took the setup 740 miles with no probs up to northern Wis. Then later this summer towed the same setup over 1200 miles to northern Minnesota. (Both are round trips). I have not noticed ANY strain on the vehicle. The first long pull I rigged up the vacuum guage again so that I could train myself when to downshift since I have an M6. Knowing when to downshift is the most important part! Plus I was able to monitor how hard the engine was pulling. Got over 23 MPG at about 70MPH with the A/C on the second trip. I also pull a popup camper here and there... done about 150 miles with that setup at 16-18 MPG. I don't like to pull the popup alot, that is close to too much for me, despite it's lightweight. Check out my other thread for more details and pics:
http://www.gtoforum.com/showthread.php?t=8645&highlight=trailer
If you need any more help or ?s answered, I'll be happy to pitch in. :cool
Good luck :cheers
Dan
