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.
Chevrolet Cobalt Service & Repair Manual. Description
The TPMS (Tire Pressure Monitor
System) warns the driver when a significant loss or gain of tire pressure
occurs in any of the four tires, and allows the driver to display the individual
tire pressures and the locations on the DIC (Driver Information Center)
display. The syste ...