To find it, you need to:
1. Consult your owner's manual: This is the most reliable source. The manual will have a diagram showing the fuse box layout and identifying which fuse corresponds to the power outlet (cigarette lighter).
2. Locate the fuse boxes: The 2007 Chevy Express likely has multiple fuse boxes: one under the hood and one inside the passenger compartment (often under the dash).
3. Check both fuse boxes: Once you've found the fuse box diagrams, carefully examine both fuse box panels. Look for a fuse labeled "power outlet," "cigarette lighter," "accessory power," or a similar designation. The amperage rating might also be listed.
Without your owner's manual, providing the exact location is impossible. The diagrams in the manual are essential for correctly identifying the fuse.