So our PCMs are rather dumb then? Why can't we buy these "Bully Dog" devices that are supposed to be the cat's meow for diesel engines?? Why do our gas engines need a $1,000.00 piece of equipment, and THEN have to pay for everytime we want to tune the engine? Why don't we get something as simple as device that gives us a Stock setting, a power setting, and a milegae setting??? I realize on a diesel they just change the point the wastegate opens up to give more power, but still??