OnStar

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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 ...

Transportation Options
Warranty service can generally be completed while you wait. However, if you are unable to wait, GM helps to minimize inconvenience by providing several transportation options. Depending on the cir ...

True luxury interior with real carbon fiber

The interior itself is well laid out with everything where it should be and an easy-to-find position for performance driving. Though the leather on the shifter does seem cheap, the coating on th ...