Hi. Just received new 2017 GMC 2500 Duramax ATX. I ordered the truck with the 4500kg (9900lb) option but dealer made a mistake and ordered the truck with the 4532kg (10000lb) rating. They say nothing can be done. I don't want to do annual inspections. Just wondering whether anyone knows if the GVWR can be changed after the fact. Vehicle is identical in both cases, just a number on the VIN sticker. Any suggestions? Thx.