The gp cannot be the only vehicle that has canbus. I am sure there are tuners out there that are capable of tuning a canbus car.You cannot tune a 2008 model year grand prix. (The GXP has a different computer because it's a V8)
Not to burst your bubble, but it's the only year that nothing can be done with the PCM. 2008 was the first year canbus and they never made a 09+ grand prix so no one decided to try and make them "tune-able".
08 was full CANbus. the 04-07 was a hybrid serial/CANbus system analogous to the old OBD1.5 cars/transitioningThe gp cannot be the only vehicle that has canbus. I am sure there are tuners out there that are capable of tuning a canbus car.
That is totally irrelevant to what I was saying.08 was full CANbus. the 04-07 was a hybrid serial/CANbus system analogous to the old OBD1.5 cars/transitioning