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 Service & Repair Manual. Stabilizer Bar, Replace
Front
1.
Raise and support vehicle, then remove
tire and wheel assemblies.
2.
Remove rear transaxle mount.
3.
On models equipped with soft or
sport suspensions, remove steering gear assembly.
...