See also:

Engine Oil Additives/Engine Oil Flushes
Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance and engine protection. ...

Turn-by-Turn
This display is used for the OnStar or Navigation System Turn-by-Turn guidance. See OnStar Overview or the navigation manual, if the vehicle has navigation, for more information. ...

Second Row Passenger Belt Reminder Light
When the engine is started and the Trip/Fuel display is chosen, three gray safety belt symbols come on and stay on for several seconds on the top of the Driver information Center (DIC) to remind ...