I have a 05 SSR with a 6.0L LS2 auto tranny and wanted to know if there is any advantage in modifying the Diablo tune that come with my tuner or the stock tune that is in the unit is best suited for the engine, looking to get as much as I can get out of this engine before I decide to make changes to ...

Today I decided to load the tune again from my Diablo Sport into my 2005 Chevy SSR and went through all the boot up but this time when I tried to upload a tune I got the message Invalid License. The tune in this vehicle does not match the last tune written, if I look at last tune written it says ...