I purchased my '06 with 12086 miles on it 3 weeks ago tomorrow in Stealth (Thunder) gray.. Even though its only been driven a about 500 miles (on vacation and back) I am nothing more than pleased all PCM's updates had been done, no rear diff leak or whine, I did have the creaky drivers seat fixed
100k warranty.. even though the years will be up before the miles i'm sure. GM even honored the NAVDisc updates. My car wasn't purchased until 6/27/07 in Mt. Pleasant SC -- not sure what happened but it ended up at a dealership in Columbia, and I had it transferred here... I paid 39k for it -- Still even smells new on the inside..