The fuse and relay box location in a 1993 GMC Suburban depends slightly on the specific trim level and options, but it's generally found in
under the hood, on the driver's side. Look near the battery, often attached to the inner fender well. It's usually a black plastic box.
There might be a smaller fuse panel inside the vehicle as well, typically located under the dashboard on the driver's side. This usually handles interior accessories and is separate from the main under-hood fuse/relay center.
