Quadzilla has finally done it! The Gas Tuner has been updated to include 2006 versions of the GM Truck product line. This programmer still has all the great features as before, such as corrections for tire size and gear ratio, the ability to read and erase diagnostic codes, and a function to remove the top end speed limiter. It also continues to work on the entire GM, Chevy, Cadillac, and Hummer H2 lines. For any V6 or V8 engine 01 to 06, the Quadzilla downloader makes the vehicle come alive. You can actually feel the engine respond to the new program and not just the transmission alone. Whether you are driving a Suburban, Tahoe, Sierra, Escalade, or an H2, you can get the full benefits of the Quadzilla Gas Tuner.