[highfigh]

A DiabLew tune is the best thing I've ever done to my truck. Makes the truck come alive and drive the way it should have from the factory. it's not going to give you a bunch more power but it greatly improves the driveability and the way the transmission shifts.

GM had to meet EPA/CARB/CAFE standards, you don't. That's the reason many vehicles are dogs when they leave the factory.