The 50 State Triple Dog Gauge Tuner for Diesel has been groundbreaking for Bully Dog in the tuning industry. This 50 State GT Diesel has several features to match your needs. For example, the sleek display unit can be set to display several different engine parameters and performance monitors. Bully Dog's easy to apply internet updates will mean that you can keep tuned to the latest updates implemented by our overachieving engineering department. Diesel owners, the GT Diesel is your chance to tune your ride to one of the latest and greatest tuners on the market.