I’m not sure about the weight issue for depreciating a van or truck. Does the 6,000 pounds of “gross vehicle weight” mean loaded or unloaded weight for trucks and vans? Is that the same as GVWR (gross vehicle weight rating)?
You need to reference the IRC Section 179 limit & IRC Section 280F. Specifically, when dealing with a truck or van, you would review its gross vehicle weight rating “GVWR” (loaded) which must be over 6,000 lbs., but less than 14,000 lb. This should be clearly indicated on a label on the inside of the driver’s side door. For cars, its 6,000 pounds of unloaded gross vehicle weight or less.
IRS Publication 946, IRC Section 280F