Does anyone have a mild towing tune they would share with me. I am pulling an enclosed car trailer. Total weight about 7000 lbs. More concerned with fuel economy over power. A friend with a shop is helping me with this but they don't have diesel experience so this would be a big help. Truck is all stock 2006 2500HD Allison 6spd. stock tires and wheels. Any help is greatly appreciated. my email address is