To find the correct fuse:
1. Consult your owner's manual: This is the most reliable source. The manual will have a diagram showing the fuse box layout and what each fuse controls.
2. Check the fuse box diagrams: There are usually two fuse boxes in a Trailblazer: one under the hood and one inside the cabin (often under the dashboard). Look for diagrams within the fuse box covers themselves. These diagrams might list the radio or audio system as a component fused separately or as part of a larger circuit (like "Power Outlets").
Without knowing the year and model of your Trailblazer, it's impossible to give you a precise answer.
