[Northofu1]

You have to go by the GVWR numbers for both vehicles to get the GCVWR. You have to know exactly what the payload is as posted on your tundra, not a brochure. There are at least 10 Hideouts for that year and length that all have hitch weights that vary from 620 to 850 (empty), with out knowing what you have exactly, it's extremely difficult to figure it out and advise you. The labels on the two vehicles will have the exact numbers and always follow the gross weights, not dry.