Whine coming from All-Wheel-Drive unit. Haven't taken this to be checked out yet. However, this seems to be getting quieter with time.
Excellent sport pickup hands-down. The ride in this pickup is what was the selling point for me. It rides like a car, and handles like one too. The reason why I got this over the faster SVT and the V10 viper dodge was because I still wanted what I like to call practicality. This pickup can tow over 7,000 pounds with no issues and no complaints. The stereo is more than adequate, and the seats are nice and supportive. Even though this pickup was far more expensive over its competitors, I still think it is a good value if you are looking for something that will turn heads and stomp Mustangs.
As for performance... This pickup is wonderful in terms of power-to-spare. 0-60 in 6.3 seconds is plenty enough for a full-sized extended-cab pickup. The all-wheel-drive system is amazing on the pavement or off. The truck really shows off in sand. Only down side is you can't spin the tires, but drift-style driving is really fun!
As for economy... This pickup is not economical. it gets a consistent 14-16 mpg overall. The only thing that saves money is the GM Oil Life monitoring system that cuts down on changes. Another nice thing is that GM only recommends premium unleaded fuel. I have achieved satisfactory results using only regular.
Overall, this is a very satisfying and great looking truck. It has the refinements I would expect from Chevrolet, along with enough power to put a tingle in my gut and a smile on my face. Chevy's making a comeback!
I have thought about trading my Tahoe for onn of these. How does the ride compare to the Avalanche?