Where is the fuel cut off switch on a 1991 Chevrolet Suburban?

There isn't a readily accessible, single "fuel cut-off switch" like you might find on some equipment or boats on a 1991 Chevrolet Suburban. Fuel delivery is controlled electronically and through the vehicle's normal systems (ignition, fuel pump relay, etc.). To stop fuel delivery, you would need to:

* Turn the ignition off: This is the primary way to stop fuel flow.

* Disable the fuel pump relay: This requires locating the relay in the underhood fuse box (often labeled) and removing it. This will prevent the fuel pump from operating. This is a more advanced procedure requiring some mechanical knowledge.

There's no easily reachable switch designed for emergency fuel shut-off. The design emphasis is on safety and preventing accidental shut-off.