Quote: Originally Posted by
Jahntassa 
AFAIK, that car runs with the GM LAN system. You need to get a 'kit' and/or adapter to retain the radio's data functionality, or find a harness that would allow you to relocate the radio if you wanted to take it out completely. Unfortunately someone at GM had the great idea to run some of the car's computing functions through the radio.
This is actually untrue for the Cobalts. In the new Monte Carlos and the Malibus however, it is true. They are talking about the DIC or Driver Information Center. This module displays your important data info like Mileage, Coolant Temp, Oil Life (Useless), MPG, Miles left on Tank of Gas, etc.
Here is the difference...
Take a look at the Malibu Radios.. notice it's all on the radio.
Now here is the cobalts...
The DIC controls the Cobalts as well, but it's located on the Gauge cluster. The only reason you may need to keep your stock radio is if you had ONstar, which I don't believe too many cobalts had. There may also be a module to work like XM has.
As far as the Screen goes.. a 6.5" or 7" fits almost perfect with a metra adapter.
I will be completing my project by the end of summer with GPS, MP3, DVD and WIFI with a Sprint Card