Originally Posted by TTMartin
It is important for people to understand that while it is true for the Honda Ridgeline, it doesn't mean every vehicle's GCVWR gets reduced at altitude.
I know Honda and Ford often do this, and most other OEM's don't.
I have not gone and looked at Ford with their turbocharged engines, but plausibly those won't have an elevation restriction.
As always, consult the owners manual and door sticker for your own vehicle to really know what your limitations are.