2009 GMC Acadia Owner's Manual - Page 494

Automatic Volume Control Automatic Volume Control: With automatic volume control, the audio system adjusts automatically to make up for road and wind noise while driving. To use Automatic Volume Control: 1. Set the volume at the desired level. 2. Press the MENU key to enter the menu screen, then press it repeatedly until Radio is selected, or touch the Radio screen button. 3. Press the Automatic Volume Control screen button. 4. Touch the LOW, MEDIUM, or HIGH screen buttons. Each higher setting allows for more compensation at faster vehicle speeds. Then, as the vehicle is being driven, automatic volume control automatically increases the volume, as necessary, to overcome noise at any speed. The volume level should always sound consistent while driving. To turn automatic volume control off, touch the OFF screen button. Remove/Add XM Categories 1. Select the Remove/Add XM Categories screen button to remove or add XM categories when selecting from the category list screen. The list of XM categories appear on the screen. 2. Use the up and down arrow screen buttons to scroll through the list. The categories to remove highlights and the categories to add are dark in color. 3. Select the category that you would like to add or remove. 4. Select the Restore All Categories screen button to add all categories that have been removed. 3-8