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. 2005-10 Cobalt
After changing engine oil, Engine
Oil Life System must be reset as follows:
1.
Turn ignition to RUN, with engine off.
2.
Press information and reset buttons
on DIC at same time to enter personalization menu.
...