I recently purchased a 2004 Silverado,5.3L V8 1500 4x4 Extended Cab Short bed truck. The owner's manual says that you must have at least
500 miles on the truck before towing anything, and then, after that, for the first 500 miles that you tow anything, you must keep the speed at 50mph or less. What is the reasoning for keeping the speed at 50 or less?Gig