Your GM vehicle has a number of sophisticated computers that record information about the vehicle’s performance and how it is driven. For example, your vehicle uses computer modules to monitor and control engine and transmission performance, to monitor the conditions for airbag deployment and deploy airbags in a crash and, if so equipped, to provide antilock braking to help the driver control the vehicle. These modules may store data to help your dealer/retailer technician service your vehicle. Some modules may also store data about how you operate the vehicle, such as rate of fuel consumption or average speed. These modules may also retain the owner’s personal preferences, such as radio pre-sets, seat positions, and temperature settings.
Chevrolet Cobalt Owners Manual. Center High-Mounted Stoplamp (CHMSL)
To replace a CHMSL bulb:
1. Open the trunk.
2. Press the tabs to release the bulb assembly.
3. Pull the bulb assembly down to access the bulbs.
4. Pull the old bulb straight out.
5. Push the new bulb straight in until it clicks.
6. Align the tabs in the bulb assembly with the
assembly in th ...