I'm a bit confused here, I'm trying to ensure that if I snoop out a Powrtuner it will work with my Grand Prix, and on the list of supported OSID's I see this:
2005 Pontiac Grand Prix V6 3.8 L36 - 12596631
2005 Pontiac Grand Prix V6 3.8 L67 - 12596629
2005 Pontiac Grand Prix V6 3.8 L67 - 12596630
I've got an 05 GP GT and it has the L26 in it, which is just the series III whereas the L36 is the series II, and I thought the switch was made between the 03 and 04 models (besides the small differences in pushrods and such).
And no N/A for 05? If the 05 L26 is supported I'll get you one once I find a Powrtuner at a good price.