Well having read many threads on the problem with timing chains on early 2.2 JTS breras I'm now having second thoughts on this 06 which I'm supposed to go and see on Saturday especially so when I've just read someone had to change there's at 16k, one person had 20k on the clock and some had 30k on the clock. I have however mailed my indy garage for a price on what they would charge for changing the timing chain and sprockets if I were to buy the car.There isn't a timing chain change interval. It isn't a service item.
Replace if the diagnostics indicate that it's 'stretched', if not, leave well alone.
Nothing like the cam belts of old.
Clutch seems very robust.