In addition to the trunk release button on the Remote Keyless Entry (RKE) transmitter, the trunk can be opened from inside the vehicle by pressing the remote trunk release button. This button is located inside the driver storage compartment, on the left side of the instrument panel.
See Trunk.
Door Locks
WindowsChevrolet Cobalt Service & Repair Manual. Radio, Replace
1.
Remove accessory trim panel and disconnect
electrical connectors.
2.
Remove mounting screws and pull radio
out.
3.
Disconnect radio electrical connectors
and remove radio.
...