It is not necessary to check the manual transmission fluid level. A transmission fluid leak is the only reason for fluid loss. If a leak occurs, take the vehicle to a dealer/retailer for service. Have it repaired as soon as possible. You may also have the fluid level checked by your dealer/retailer when the oil is changed. See Recommended Fluids and Lubricants for the proper fluid to use.
Chevrolet 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 ...