Interesting. I realize this is an old thread, but many of them are.
I just bought a 2010 G6 GT sedan. It has the 3.5 and a 4 speed auto without tap shift. It has white backlighting on the instruments and radio display. All of the other backlighting is red. The DIC is totally contained in the instrument cluster. NOTHING in the radio. The radio is the CD with USB and aux input. 8 speakers. Steering wheel controls for the radio and the DIC functions. It is, without question, the best factory audio system I've ever owned. It has the premium package and (I think) touring package, but does not have the sport package.
So... What is the difference between a 2009.5 and a 2010?
And were there any 2010 convertibles?
There are few, if any significant differences. 2010 MY was a winddown production order to fill fleet orders. Because of the retooling for 2009.5, GM didn't plan on any major changes to begin with.
* Some 2010 MY Speedometers Are Updated (But all
2009.5 & 2010 have DIC integrated) -> All that changed was a reduction in MPH as the speedometer went way beyond what the car could do
* FlexFuel badges (if applicable) are green, not yellow (consistent with other GM 2010 MY vehicles)
* TAPShift and other stuff minor stuff became "we don't care, production's ending and the order has to be filled" out-of-spec stuff. Some cars got StabiliTrak that weren't RPO'ed, same with Bluetooth and other stuff. Nobody got the wrong transmission or anything epic, however.
All G6 GXP and Convertible production (AFAIK
) was halted to focus on fleet orders for 2010 MY after the Chapter 11 declaration. If there are 2010-titled units, they were either test cars, or special one-offs.
And there are plenty of one-offs, from the G6 GXP with a non-GXP (but 2009.5-updated) grille, to unique colors, etc.
There is no "touring package" - just sport and premium. But in 2010 MY, like I said, that stuff became a bit more slapstick... fleet buyers weren't as concerned and wouldn't even have the cars in 36 months anyways. You may have gotten Monsoon as a freebie, for example.