See also:

Selecting the Right Engine Oil
Selecting the right engine oil depends on both the proper oil specification and viscosity grade. See Recommended Fluids and Lubricants on page 11‑12. ...

Vehicle Information Menu Items
(Vehicle Information): Press this button to scroll through the following menu items: OIL LIFE Press the vehicle information button until OIL LIFE REMAINING displays. This display shows an estimate ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if the vehic ...