I just ordered a 2011 GMC Sierra Duramax diesel. That's after a bad experience coming home from Upstate NY broken down on the side of the road with boat in tow -- plus wife and kids. The hills and curves were challenging for my 2000 5.3l gas Tahoe loaded down with bunches of luggage and pulling a 20ft bass boat. Wife would definitely not drive it. Anyway, I was amazed at the progress they've made with diesels. The emissions are down by 40-60%, power up about 15%, gas mileage improved, noise reduced. And that's just since 2010 model year. I never thought I would buy I deisel but the more I learned the more I liked it. Esp. when I got behind the wheel. It's got the power. :thup