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.
Chevrolet Cobalt Service & Repair Manual. Reading Lamp Bulb, Replace
1.
Remove reading lamp lens (1) from lamp,
Fig. 1.
2.
Remove bulb (2) from reading lamp,
Fig. 1.
3.
Reverse procedure to install.
Fig. 1 Reading lamp bulb removal ...