See also:

Accessories and Modifications
When non-dealer/non-retailer accessories are added to the vehicle, they can affect vehicle performance and safety, including such things as airbags, braking, stability, ride and handling, emissi ...

How OnStar Service Works
: This blue button connects you to a specially trained OnStar advisor to verify your account information and to answer questions. : Push this red emergency button to get priority help fro ...

Performance
The Regal I tested packs the base engine — a 2.4-liter four-cylinder that's good for 182 horsepower. There's no way around it: This is a sedate engine. You probably won't notice that it lacks po ...