* GVWR (Gross Vehicle Weight Rating): This is the maximum weight the vehicle can be, including its cargo. P30s had various GVWR options.
* Options and Equipment: Things like added features (refrigeration units, shelving, etc.), the type of body installed on the chassis (different upfits added weight), and the engine choice all affected the final weight.
To find the weight of a *specific* 1994 Chevy P30 step van, you'd need to find its GVWR (often found on a sticker inside the driver's side doorjamb or in the owner's manual) and then consider the weight of any added equipment. Even then, the *actual* weight would depend on how much cargo it was carrying.