They haven't replaced anything yet. They tried to "resusitate" the Triptunes module but that didn't work so they have ordered a new Triptunes module. The Shaker 500 (with factory Sirius) was working fine until a few days after the Triptunes Advanced install...so I think the dealership is on the right track. In the meantime, though, I'm tooling around with a dead radio with a clock function.
I'll give it another week before I prod the dealership into simply restoring my radio function while I wait for a working Triptunes module. [Hey, that "free" six month Sirius subscription is ticking away!]

 

I bought my '07 GT in Aug of 06. I drive a LOT (already have 45k miles on it). At 38k miles, the CD player broke (some of the teeth on a gear broke). I couldn't play any CD's and it wouldn't eject the ones in the 6-CD unit. No extended warranty. So I had to go to an aftermarket DVD, Nav, Bluetooth. I liked the look of the Shaker, but the new unit is MUCH better.

 

My radio is working again. The problem was a shorted wire in the Triptunes wiring harness. The dealership replaced the Triptunes module and the harness. The repair was covered under the parts warranty.