OnStar Services

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Playing an MP3/WMA Disc
CD players with the MP3 feature are capable of playing an MP3/WMA CD-R or CD-RW disc. See MP3 for more information. ...

Auto Rear Defog
This will allow you to turn the auto rear defog on or off. Press the MENU/SELECT knob when Auto Rear Defog is highlighted to open the menu. Turn the knob to highlight On or Off. Press the knob ...

All-Wheel Drive
Transfer Case When to Check and Change Lubricant The transfer case is filled with oil during manufacture, which then does not require changing. It is not necessary to regularly check the transf ...