* Engine size: The 1993 Chevy 1500 came with several V8 engine options (e.g., 5.0L, 5.7L, 7.4L). Larger engines generally get worse gas mileage.
* Transmission: Automatic or manual transmissions will affect fuel economy.
* Vehicle condition: Proper maintenance (tune-ups, air filter changes, etc.) significantly impacts mileage.
* Driving habits: Aggressive driving, frequent acceleration and braking, and idling will reduce fuel efficiency.
* Payload and towing: Hauling heavy loads or towing a trailer will dramatically decrease gas mileage.
* Terrain: Driving in mountainous areas or on rough roads uses more fuel.
Therefore, it's impossible to give a single definitive answer. However, you can expect a range from roughly 10-15 mpg in city driving and possibly 13-18 mpg on the highway for a typical configuration. The larger the engine, the lower the MPG. Those numbers are rough estimates at best.
To get a more precise estimate, you should consult the owner's manual for the *specific* engine and transmission of the truck. Even then, that's just a theoretical figure; real-world mileage will likely differ.
