I had a similar situation with my truck when I bought it and didn’t realize it for the first year. The dealer did the original registration and the GVWR was really low. I would have been overweight with just me in the truck. This would have been a big fine if I had ever been pulled over (which is common on some highways here).
On renewal I had it changed to the max GVWR for my truck. I only need the higher GVWR for when I’m towing in the summer months and can reduce the rating to save on fees for the rest of the year but can’t be bothered with the hassle. I pay the higher license rate to avoid the penalties if caught underrated.
