October 1 GM numbers to ponder

Hi folks -- a few numbers taken from the GM October 2 Press Release:

689,334 total vehicles in Inventory, an 82 day supply.

240,810 Full-sized pickups, a 116 day supply.

Current year to date retail change vs. 2011 to Sept. 2011.
2011 not a great year by any stretch of the imagination.

Chevrolet -- +4.9%
GMC -- +3.9
Buick -- -2.0%
Cadillac -- -8.6%

Total GM up 3.4%

So Cadillac is on the way up?
Chevy the winner for GM in terms of numbers. Numbers are one thing, what about profits per unit?