Chevrolet TrailBlazer - 2008 Fuse Box Diagram diagramfusebox›ChevroletTrailBlazer - 2008 Fuse Box; Testing the Alarm. To test the alarm: 1. From inside the vehicle, lower the driver’s window. To reinstall the fuse panel cover, reverse the. sequence. Notice: Spilling liquid on any electrical components. on your vehicle may damage it. Always keep the. Interior Fuse Box Location: 2002-2009 Chevrolet Trailblazer The video above shows how to replace blown fuses in the interior fuse box of your 2005 Chevrolet Trailblazer in addition to the fuse panel diagram location. Electrical components such as your map light, radio, heated seats, high beams, power windows all have fuses and if they suddenly stop working, chances are you have a fuse that has blown out.