No, a 1993 Chevy Silverado 1500 doesn't have a single, readily accessible "cut-out" switch that simultaneously shuts off both fuel and spark like some modern vehicles might have for security or emergency purposes. Fuel delivery is controlled by various components (fuel pump relay, injectors, etc.), and spark is controlled by the ignition system. There's no single switch controlling both.
While you can disable the truck by disconnecting the battery, pulling a specific fuse (this would affect various systems, not just fuel and spark), or disabling the ignition system (more complex and potentially damaging if done incorrectly), there's no dedicated "kill switch" as you describe.
