I'm selling my handheld Diablo Predator GM tuning unit..... Here is some info from their website: The U7194 Predator Handheld tuner is designed to add power to the LS2 family of vehicles including 2010-2011 Camaro, 2008-2009 G8/GT/GXP, 06-10 Corvette C6/Z06 and 07-10 GM trucks/ SUVs. Tunes add 15-20 Rear wheel horse power and ft/lbs TQ. This tuner allows for massive adjustability- enough to calibrate for most aftermarket bolt ons right out of the box! User can check air fuel ratio, monitor and log high speed engine data and view the information on their PC with the new DiabloSport GM data logger! This tuner also features internet updates and the ability to check and clear diagnostic trouble codes! I'm selling for $200 FTF, i used it over a few months and on long hauls gained upwards of 3-4mpg on the highway, but the nice increase in midrange power delivery made my avalanche feel much more fun to drive.