2010 GMC Savana 2500 Cargo Owner's Manual - Page 146

Outside Heated Mirrors For vehicles with heated mirrors: Storage Areas Your vehicle may have a front storage compartment. It is located at the center of the instrument panel extension, by the floor. To open the compartment, pull up on the latch. The compartment will open automatically. Storage compartments may also be included on the inside of each front door. < (Rear Defogger): Press to heat the mirrors. An indicator light in the button lights when the outside heated mirrors are activated. See "Rear Window Defogger" under Climate Control System on page 4-15 for more information. 3-42