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I mentioned in your other thread to have them check the harmonic balancer for wobble.
As for the Nav firmware update you can do it yourself. Follow THIS thread. I did it and it was simple. The dealer would need to have the disc's handy to do it and if they do you can go ahead and let them do it.
According to my sources the active handling and the roof panel separation are the only two.
Evan, Chevrolet Customer Service
Evan:
I resolved the active handling issue on my wifes 05 with the clip install
is there a way i can get this closed out for being open?
Can i give you the VIN?
I hardly ever let anyone touch my cars (former mechanic here)
also have a very sensitive allergic wife and wont allow anyone in/near the car that smokes, has colognes, perfumes, etc... kills her asthma