Once again, we’re putting the weight aside to focus not on the distance covered by the convoy, but on speed. Diesel Power's Jason Sands took a GMC 2500HD to try and take down the Guinness World Record for the fastest speed towing a trailer. The attempt took place at El Mirage Dry Lake in California on August 23, 2012 when the GMC towing a Carson Kalispell managed to reach 141.998 mph (228.523 kph).