Exactly, Chevy has pounded into the public, built like a rock, cowboys, union workers blue coller. GMC has gone after the Professional Grade. Shows up scale vehicles, small custom companys doing higher end custom work. As a white coller worker and one that plays hard off road and on road and tows boats, I want a Professional Grade Truck.
Croc has hit the Nail on the Head, This is one of GM's Success of Brand Management. I talked to some construction workers working on the building next door and they all drive Chevy or Dodge trucks except a few and the few are the managers who over see the work force. They consider themselves semi white coller and like the image of the Professional Grade Trucks GMC puts out over the average trucks Chevy or Dodge produce for the worker bee's.
This is all about successful Brand management and that white coller will pay a few thousand more for the GMC Professional Grade over the Chevy.
In regards to your SAAB, they might sell a few thousand in Europe compared to the 50 or so Cadillacs, but here in the US, they barely sell at all compared to Cadillac. Over all SAAB LOST their Premium status long ago and became also Rans next to Lincoln and Cadillac. Cadillac is picking itself up and moving in the right direction, SAAB starved of proper product is best just killing it off. Even the country GOV see's it as best left to a history lesson.