See also:

Fuel
For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax Diesel Supplement. For Vehicles with gasoline engines, please read this. ...

Reactivation for Subsequent Owners
Push and follow the prompts to speak to an Advisor as soon as possible after acquiring the vehicle. The Advisor will update vehicle records and will explain the OnStar service offers and options ava ...

Washer Fluid Messages
WASHER FLUID LOW ADD FLUID This message displays when the windshield washer fluid is low. Fill the windshield washer fluid reservoir as soon as possible. See Engine Compartment Overview on page 10 ...