To find it:
1. Consult your owner's manual: This is the best source. The manual will have a fuse panel diagram showing the location of each fuse and what it controls.
2. Locate the interior fuse panel: It's often under the dash, sometimes behind a small access panel. You might need a flashlight.
3. Examine the fuse panel diagram: Once you've located the panel, there should be a diagram on the inside of the cover or near the panel itself. Look for "rear window defroster," "rear defogger," or a similar label. The diagram will show the fuse's location and amperage.
If you can't find it in the interior fuse panel:
* Check the glove compartment: Some vehicles have a secondary fuse box inside the glove compartment.
* Search online: Search for "2005 Chevrolet Trailblazer fuse diagram" along with your specific trim level (LS, LT, etc.) Several websites offer downloadable diagrams.
Remember to always turn off the vehicle before working with fuses. If you're unsure about anything, it's best to take your Trailblazer to a qualified mechanic.