[Carl n Susan]

The yellow weight stickers didn't start until somewhere around 2011. A 2007 doesn't have one. There should be a weight sticker inside the kitchen cabinet door. Could it be you are looking at the sticker on the driver's side outside wall (if it is still readable after all this time). Could the 1597 be the KG number?

I had a 2005 2955 which is the same as the 2007. My experience was you can't carry enough (short of gold bars) to get it overweight. I am surprised you have G rated tires. A 2955 had either 5280 lb. (in 2005) or 6000 lbs axles. A good LT range E tire was the best tire for it. I know the stock rims wouldn't handle 110 PSI.