Sometimes a fear of heights can contribute to other fears, like aviophobia. Cognitive behavioral therapy (CBT) is sometimes helpful in treating cases of aviophobia. Aviophobia is a fear of flying.
Re: Increase towing capacity? Postby Z15 Â» Jul 01 2010, 5:59am. With that kind of weight you need to beef up the suspension big time. Air bags are not going to cut it, you need heavier springs, HD shocks, Load range E tires, bigger brakes.
  Answer   The towing capacity for a 2003 Chevy Silverado 1500 is 8400-pounds with Quadrasteer and Quadrasteer increases the towing capacity of Silverado 1500 with t â¦ he Vortec 5300 to 8600 lbs or 10,200 pounds with a weight-distributing hitch and sway control. 23 people found this useful.