On vehicles with power door locks, the doors automatically lock when the shift lever is moved out of (P) Park for a vehicle with an automatic transmission.
For a vehicle with a manual transmission, the speed must be greater than 5 mph (8 km/h).
The automatic door locking feature cannot be disabled.
Chevrolet Cobalt Service & Repair Manual. Tightening Specifications
Year
Component
Torque, Ft. Lbs.
2009-10
Accelerator & Cruise Control Cable
89 2
Air Cleaner Clamps
44 2
Air Cleaner Outlet Resonator Mounting Bolt
...