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 Owners Manual. Engine Compartment Overview
When you open the hood on the 2.2L L4 engine, here is what you will see:
A. Engine Air Cleaner/Filter (2.0L Turbo Engine) or Engine Air Cleaner/Filter
(2.2L Engine).
B. Engine Oil Fill Cap. See “When to Add Engine Oil”
under Engine Oil.
C. Engine Oil Dipstick (Out of View). See “Checkin ...