* Under the hood: This is the main fuse box, containing larger fuses and relays. It's usually located on the driver's side fender well, near the battery.
* Inside the cab: This is a smaller fuse panel and is typically located under the dashboard, on the driver's side. You might need to remove a small access panel to reach it.
To be absolutely certain, consult your owner's manual. It will have a diagram showing the exact location and layout of both fuse boxes. The manual will also detail which fuses control specific circuits.