| Easy to use. Just plug tuner into your vehicle's diagnostic port. Answer some yes or no and A/B questions. Unplug and you're ready for power (65-125 Horsepower and 100-200 ft. lbs Torque), raising top speed limiter, adjusting changes in tire height and even the ability to read and clear diagnostic codes. *For 2004.5 and newer Duramax LLY engines. To see if you have an LLY engine, check the 8th digit of your VIN for the number 2. |