I have a 2008 pontiac g8 gt the transmission is a 6l80 the app will not read trans temp I would also like to see the air fuel ratio but it won't give me that either the only reason I paid for the app was to get those and it won't read them
i just did a quick check
the G8 doesn't seem to have wide band sensor , they seem to have the old narrow band o2 ... so you will not get AFR