What is the curb weight of a 91 Chevy G20 van 34 ton?

There's no such thing as a "3/4 ton" Chevy G20 van. The Chevy G20 was available in 1/2-ton and 3/4-ton configurations. The curb weight varied depending on the year (1991 in your case), engine, options, and trim level. There's no single definitive answer.

To find the curb weight for *your specific* 1991 Chevy G20 van, you'll need to:

* Check the vehicle's sticker: Look for a sticker (often in the driver's side door jamb) that lists the vehicle's specifications, including curb weight (or GVWR - Gross Vehicle Weight Rating, which is a related figure).

* Consult a 1991 Chevy G20 brochure or owner's manual: These documents sometimes list curb weight ranges for different models.

* Use an online database: Websites specializing in vehicle specifications might have this information, though you'll likely need the specific trim level and engine size.

Without that specific information, I cannot provide the curb weight.