The tire sealant and compressor kit is located in the trunk.
1. Open the trunk. See Trunk.
2. Lift the trunk liner.

3. Remove the retainer that holds the tire sealant and compressor kit.
4. Remove the kit from the foam container.
To store the tire sealant and compressor kit, reverse the steps.
Tire Sealant and Compressor Kit
Changing a Flat TireChevrolet Cobalt Owners Manual. Replacing Restraint System Parts After a Crash
WARNING:
A crash can damage the restraint systems in your
vehicle. A damaged restraint system may not
properly protect the person using it, resulting in
serious injury or even death in a crash. To help
make sure your restraint systems are working
properly after a crash, have them inspected and ...