See also:

Accessories and Modifications
When you add non-GM accessories to your vehicle they can affect your vehicle’s performance and safety, including such things as, airbags, braking, stability, ride and handling, emissions systems, ...

Rear Underseat Fuse Block
...

Setting the Time and Date (Radio with CD and Touchscreen)
To set the time: 1. Press the CONFIG button to enter the menu options. Turn the Menuknob to scroll through the available setup features. Press the SELECT knob or press the Time screen butto ...