Where is the fuel pump cut of switch on a 99 Malibu?

There isn't a readily accessible, dedicated "fuel pump cut-off switch" on a 1999 Chevrolet Malibu like you might find in some other vehicles. The fuel pump is controlled by the PCM (Powertrain Control Module) and various safety interlocks. Disabling the fuel pump typically requires disconnecting the fuel pump relay or fuse, or more drastically, disconnecting the power to the PCM itself (which is generally not recommended and should only be done by a trained mechanic).

To disable the fuel pump for safety, you would need to:

* Locate the fuel pump relay: This is usually found in the underhood fuse box, but its exact location needs to be confirmed by consulting your 1999 Malibu's owner's manual or a wiring diagram. The manual will identify the relay.

* Remove the fuel pump relay: Once located, simply pull the relay out. This will interrupt the power to the fuel pump.

Caution: Working with the electrical system requires caution. Always disconnect the negative battery terminal before working on any electrical components to prevent accidental shorts or injury. Afterward, reconnect the terminal carefully.

If you need to disable the fuel pump for any reason other than an emergency, it's best to consult a qualified mechanic. Improperly disabling the fuel system could lead to damage or create safety hazards.