I've had a 2003 GMC Sierra Denali 6.0L AWD Quadrasteer since it was just about new. It has 4.10 gears, and although it's a 1500, it has a tow rating of around 10,000 lbs IIRC. I've towed the same boat with it since I've had it, and the boat, trailer, and "stuf... Login to read more.