If your vehicle has power locks, it has a programmable automatic door unlock feature.
The doors can be programmed through the Driver Information Center (DIC) to automatically unlock several ways. See DIC Vehicle Personalization for more information.
Automatic Door Lock
Rear Door Security Locks (Sedan)Chevrolet Cobalt Owners Manual. Remote Vehicle Start
Your vehicle may have a remote start feature.
This feature allows you to start the engine from
outside the vehicle. It may also start the vehicle's
heating or air conditioning systems. When you start
your vehicle using the remote start feature, the climate
control system will come on and adjust ...