Chevrolet TrailBlazer - 2008 Fuse Box Diagram Chevrolet; TrailBlazer - 2008 Fuse Box; Testing the Alarm. To test the alarm: 1. From inside the vehicle, lower the driver’s window. and open the driver’s door. 2. 2008 Chevrolet Trailblazer Recurring Fuse Box Melting The 2008 Chevrolet Trailblazer has 2 problems reported for recurring fuse box melting, stops working. Average failure mileage is 125,500 miles.