I think 5266 lbs.
The 6.6L Duramax engine alone weighs aprox 835 lbs.
around 7000 pounds Good guess at 7,000 but a Chevy 2500 weight is between 5596 and 6525 lbs. depending on trim level.
12 quarts
2500
7000
12 quarts
2500
how to calculate weight of one litre diesel
6200
$ 40 from Rockauto.com
2500 lbs