* 4.3L V6: This was a fairly common choice.
* 5.0L V8: Also a frequent option.
* 5.7L V8: A larger and more powerful V8 was available.
* 6.2L Diesel V8: A diesel option was offered, though less common than the gasoline engines.
To know for certain what engine is in *a specific* 1991 Chevy G20, you'd need to check the vehicle's documentation (like the owner's manual or title) or look for the engine code stamped on the engine block itself.
