Sierra 1500 4WD V8-6.0L (2007)
Built After and Including the VIN Breakpoints shown.
The Generation (Gen) 6.1 OnStar(R) system found in these vehicles has the capability to change the default English voice recognition to French or
Spanish.
Changing the language of the OnStar(R) system will change the following features to the language you select:
Voice recognition command prompts will be played in the language selected.
The voice recognition system will only recognize commands given in the selected language.
Once completed, this process completely changes all voice recognition and voice commands of the OnStar(R) system. The process will need to be
repeated in its entirety to change to a different language, including English.
