Be prepared for driving in inclement weather, at night, or during other times where visibility or traction may be limited, such as on curves, slippery roads, or hilly terrain.
Unfamiliar surroundings can also have hidden hazards.
Learn more about driving in different conditions and off-road driving in this section.
Driver Behavior
Vehicle DesignDiagnostics
By monitoring and reporting on the
vehicle's key systems, OnStar
Advanced Diagnostics provides a
way to keep up on maintenance.
Capabilities vary by model. See
www.onstar.com for details and
system limitations. Message and
data rates may apply. Advanced
Diagnostics requires an active
OnSt ...