Is there a fuel shut off for 2000 Tahoe and where if yes?

No, the 2000 Chevrolet Tahoe does not have a manual fuel shutoff switch like some older vehicles. The fuel system is controlled electronically. In the event of a crash, the fuel pump will be shut off by the inertia switch (located usually in the passenger compartment, often under the dash), but there's no readily accessible switch to manually cut the fuel supply.