Ok, before I begin; yes this is a gas guzzling SUV. It is just a sweet design. The 4800 gets 290 HP, the 5300 iron and aluminum block gets 320 HP, the 6.0 iron block gets 350 HP, the aluminum block 6.0 gets 355 HP, and the 6.2 gets 400 HP. The 6.2 engine will gain GM's new 6 speed auto.
http://www.gm-trucks.com/gallery/thumbnails.php?album=34
http://gm-trucks.com/home/content/view/235/1/1/0/
http://www.gm-trucks.com/gallery/thumbnails.php?album=34
http://gm-trucks.com/home/content/view/235/1/1/0/