The mannual suggest that you should wait 1000 miles before towing. What can happen to your truck if you don't wait the full 1000 miles to tow a trailer. Lets say you start towing at 200 miles? Before I bought my truck I told the dealer I was going to Colorado in a few weeks and I was going to tow my 4000lb. trailer. He did not say anything about driving 1000 miles before towing.