just wondering if evolution (or anyone else around here) deals with tuning chevy trucks? my grandfather tows boats all around the country with his 05 chevy 2500 (6.0 liter w/ automatic i believe). whats out there in the way of good tunes for this thing? im thinking if he can get better shift points for towing, and improved MPG that would make a big difference in his profits since hes already got over 150,000 miles on the truck in 2 years.