I went and drove a new Denali truck this past weekend and I must say ...Im impressed.For a 7000lb AWD truck,that sumbitch will put you back in the seat when you nail it and I love the six speed w/the manual shift option on the shifter.I wanted to drive the 2WD model but they didnt have any in Denton.The exhaust sounds really good...kinda rumbly but not too loud and we were driving it in the rain and it felt very safe..as far as traction and all.When you turn the traction control off it had quite a bit more punch to it.So overall with a tune and an intake I bet this thing would be pushing 430-450 hp.The LS3 is what Im going to be looking for my next motor.I told Dad if you buy that thing....dont leave it unattended or the motor could disappear or be swapped for a 5.3....49000.00 is alot for a truck that probably going to get 11mpg around town