Yours is 22,000 if it's an E450 from 2012.
I was simply saying that pre-2010 it was 20,000lbs. They increased the brakes and it now sits at 22,000 GCWR (or it could have been 2008 when they changed)
You can also look at the 10th digit of your VIN
A is 2010, B is 2011, C is 2012, D is 2013, E is 2014, F is 2015
Then you can pull up the specs from ford for your model year to determine GCVR.
Or trust me when I say its 22,000.
PLEASE do not send questions via Private Message, my inbox fills up too quickly. Post questions in the forum as a new thread so that other users can benefit from the answers. Use Private Messages for sensitive information only (VIN, Contact info or things you do not want the public to see).