What is the timing for a 93 Chevy g 20 van?

There's no single "timing" for a 1993 Chevy G20 van. The timing depends entirely on the engine it has. The G20 came with several different engines, including various V6 and V8 options. Each engine has its own specific timing specifications, found in the owner's manual or a repair manual specific to that engine.

To find the correct timing, you must identify the engine code (often a combination of letters and numbers found on a sticker on the engine block). Then, you can consult a repair manual (like a Haynes or Chilton manual) or a reliable online resource for that specific engine to find the proper timing settings.

Without knowing the engine, any timing information given would be incorrect and potentially damaging to the engine.