Before leaving the vehicle, fully press the clutch pedal down, move the shift lever into R (Reverse), and firmly apply the parking brake. Once the shift lever has been placed in R (Reverse) with the clutch pedal pressed down, the ignition key can be turned to LOCK/OFF, then remove the key and release the clutch pedal.
See Manual Transmission Operation.
Chevrolet Cobalt Service & Repair Manual. Vehicle Visual Inspection Procedures
Gasoline & Alternative Fuel Engine Vehicles
Visual Inspection
To ensure proper operation of
all emission control system components it is required to perform a visual
inspection. Refer to the Vehicle Emission Control Information Label and
the Emission Control Application Char ...