* Driver's side doorjamb: Look closely at the sticker on the driver's side doorjamb. This sticker often contains a variety of vehicle information, including the paint code. It might be abbreviated as "PNT" followed by a code (e.g., PNT WA8540).
* Under the hood: Check for a sticker on the radiator support or the inner fender well. This sticker might also contain the paint code.
If you can't find it in either of those locations, you might need to check your vehicle's documentation (owner's manual or build sheet if available) or contact a Chevrolet dealership with your VIN number. They should be able to look up the paint code for your specific van.