OnStar Services

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Precise dimensional accuracy
Engineers developed and adhered to hundreds of criteria points when developing the DTS, and the result is outstanding fit, finish and overall harmony of the elements. Fit, flushness and gaps are ...

Park Brake and P (Park) Mechanism Check
WARNING When you are doing this check, the vehicle could begin to move. You or others could be injured and property could be damaged. Make sure there is room in front of the vehicle in case it beg ...

Transmission
Driver Shift Control (DSC) The DSC switch is located on the shift lever. To enable the DSC feature: 1. Move the column shift lever to the M(Manual) position. The Driver Information Center (DIC) ...