Chevrolet Cobalt Owners Manual. Removing the Flat Tire and Installing the Spare Tire (All Models Except SS)
1. Do a safety check before proceeding.
See Changing a Flat Tire.
2. If your vehicle has plastic wheel covers, use the
wheel wrench to loosen the plastic wheel nut caps.
Once the plastic wheel nut caps have been
loosened with the wheel wrench, you can finish
loosening them with your fingers. ...