OnStar Vehicle Diagnostics can perform a vehicle check every month. It will check
the engine, transmission, antilock brakes, and other major vehicle systems. It also
checks the tire pressures, if the vehicle is equipped with the Tire Pressure Monitoring
System. If an On-Demand Diagnostics check is needed, press
, and an Advisor can run a check.
Connections
OnStar Additional InformationRoof Rack System
Warning
If something is carried on top of the vehicle that is longer or
wider than the roof rack-like paneling, plywood, or a mattress-the wind can catch
it while the vehicle is being driven. The item being carried could be violently
torn off, and this could cause a collision and damage the v ...
Brake System Warning Light
The vehicle brake system consists of two hydraulic circuits. If one circuit is
not working, the remaining circuit can still work to stop the vehicle. For normal
braking performance, both circuits need to be working If the warning light comes
on, there is a brake problem. Have the brake system ...
Driving on Snow or Ice
Drive carefully when there is snow or ice between the tires and the road, creating
less traction or grip.
Wet ice can occur at about 0°C (32° F) when freezing rain begins to fall, resulting
in even less traction. Avoid driving on wet ice or in freezing rain until roads
can be treated with sal ...