OnStar Services

See also:

New Vehicle Break-In
Follow these recommended guidelines during the first 2 414 km(1,500 miles) of driving this vehicle. Parts have a break-in period and performance will be better in the long run. For the firs ...

Fuel Economy Light
This light should come on briefly as the vehicle is started. If it does not come on, have the vehicle serviced by your dealer. For vehicles with the fuel economy mode light, it comes on when t ...

Checking Coolant
The vehicle must be on a level surface when checking the coolant level. Check to see if coolant is visible in the coolant surge tank. If the coolant inside the coolant surge tank is boiling, do not ...