Boost Gage
WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
If the vehicle is equipped with a 3.8L V6 supercharged engine the DIC will display the amount of boost (psi or kPa) the engine is receiving. The DIC receives a class 2 message from the PCM indicating boost.