Hey there, hi there, ho there... I'm a newby to the group, and I'm looking forward to learning about tuning. I love that there is a free option, and plan on messing around with my 2001 Corvette convertible. I also have a 2004 GMC Envoy XL with the 4.2l I6, that I would love to be able to tune, but from what I can tell that is not an option using TurnerPro at this time ����.