UPS driver fed up with trucks that don't have A/C - WWSB Summer is around the corner, but already temperatures are beginning to rise. One group not happy about that is UPS drivers, since most of their trucks don't have A/C. "No one in the delivery industry uses A/C in those trucks because the doors are open all day long and the air moving in and out so it will make AC very ineffective," said Dan McMackin a UPS representative. And he says there are things the driver can do to stay cool. "Training is really key to avoiding a situation like that. The first step is hydration, the second step is focus on wellness in your every day life, so diet does add additional factors to the heat."