[Ivan Augustine] I recently purchased a 2001 4x4 chev 3/4 truck to pull a 31 ft. Jayco Travel Tr. I hear a knock/thump when I am slowing down to a stop sign before I come to complete stop. I talked to the dealers and they said it is not the truck. I don't hear the knock when I am not towing the trailor. I tow in Drive with the tow/haul mode engaged. I am wondering if any one has had a similar experience. Right now I am thinking if my electronic brake is the problem, I use a vouager brake. What do you think?