Quote:
Originally Posted by DieselDrax
That doesn’t make any sense, the payload sticker is a certification based on the vehicle weight as it left the factory. Every vehicle is different. Can you post a pic of your payload sticker?
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I always thought payload was simply a weight calculation too until recently (just a few weeks ago). My brother works for a very large truck upfitter. They are building a big run of vehicles for the Government Service Agency. Whether they are cars or trucks they have to re-weigh and put in a new payload sticker after any modifications. My brother had been finding that there were significant discrepancies in what the payload should be based on weight and what they were actually finding. So for example (made up numbers for simplicity)-
GVWR=7000
Factory payload sticker says 1500
That should mean the curb weight is 5500
He was finding that even after adding a couple of hundred pounds in equipment to the vehicle they would weigh it and find that it weighs 5200 pounds.
So the payload based on weight is actually more even though they have added equipment. They find this with all of the big 3, trucks and cars.
My brother talked to the guy he works with at the GSA and neither could make sense of this. The GSA guy said he has an engineering contact at one of the big 3 (I'll leave out which as it makes no difference here). They called him and he said "Your problem is that you aren't factoring in emissions." What?! His explanation was that a big driver of payload is loading a vehicle with increasing weight until it fails emissions. That limit is the maximum payload. It's more complicated than GVWR-curb weight.
I don't have a lot of background details - I.E. I'm sure they don't do this test for every vehicle, it's probably a model/trim package that's tested then actual weights factor in some for a unique payload sticker.
If this wasn't a direct conversation with my brother who was the one raising the question I would be inclined to think this wasn't true. Definitely an interesting conversation and I thought it was worth sharing.