To replace this bulb: 1. Open the trunk.
2. Remove the trunk trim and pull back fastener.
3. Disconnect the wiring harness by lifting up on the tab to release and pull it straight out.
4. Turn the bulb socket counterclockwise and pull it straight out of the taillamp assembly.
5. Pull the old bulb straight out of the bulb socket.
6. Push the new bulb straight into the bulb socket until it clicks.
7. Push the bulb socket into the taillamp assembly and turn it clockwise to lock it into place.
8. Push the wiring harness straight into the bulb socket and push down on the tab.
9. Reinstall the trunk trim and fastener.
Chevrolet Cobalt Service & Repair Manual. Description
The VSES (Vehicle Stability Enhancement
System) adds an additional level of vehicle control to the EBCM (Electronic
Brake Control Module). The EBCM controls the system functions and detects
failures. Yaw rate is the rate of rotation about the vehicle's vertical
axis. The V ...