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. ...

Manual Liftgate
To unlock the liftgate, press the power door lock switch or press on the Remote Keyless Entry (RKE) transmitter twice. See Remote Keyless Entry (RKE) System Operation on page 2‑3. To open the ...

OnStar Mobile App
With an iPhone® or Android™-based mobile device, an OnStar mobile app can be downloaded. The vehicle can be remote started, if equipped, or the doors can be unlocked from anywhere there is cell ...