See also:

Accessories and Modifications
Adding non—dealer accessories or making modifications to the vehicle can affect vehicle performance and safety, including such things as airbags, braking, stability, ride and handling, emissions sys ...

Navigation System
Use of the navigation system may result in the storage of destinations, addresses, telephone numbers, and other trip information. See Using the Navigation System   for information on store ...

STS adds direct-injection V-6
For 2008, STS will be the first GM vehicle equipped with a new 3.6-liter direct-injected V-6 engine. The new base powerplant, with 298 horsepower (222 kW), delivers 40 more horsepower; and torque ...