Question, are all full size square body Blazers referred to as K5 ?

[Turbo4whl]

.....But they were actually a K5 Blazer, as everyone knows. They also have the "series" listed as C10 and K10, because that's what they were based on. They were not a "lighter duty half ton".

Yes!! Not lighter, my 1974 (K5) is rated at 6200 lbs. My 1982 SBSS rated at 5000 lbs.