We bought a new Chevy Suburban in Feb 06 to tow our 7000lb travel trailer. With 4:10 rear it was supposed to do the job.After two days of engine screaming in 2nd gear and near misses trying to stop, we stopped in Texas and traded it on a new Dodge 3500 diesel mega cab. What a joy to tow with! Seats everyone in comfort. Don't need a car! Fuel mileage up to 22mpg hwy,13 towing,at 5000 miles, so it should get better. Not a single problem. Love it!