Which Chevy truck engine can run on 8 or 4 cylinders?

The Chevrolet truck engine that can run on 8 or 4 cylinders is the V8 engine with cylinder deactivation. This technology allows the engine to shut off four cylinders under light load conditions, effectively running as a four-cylinder engine to improve fuel economy. It's not a switch you manually flip; the system automatically activates and deactivates cylinders based on driving conditions.