The 3500HD is the king of Chevy pickups, offering a trailer-towing capacity of up to 23,200 pounds and a maximum payload of 7153 pounds. There are three cab styles, four wheelbases, and two bed lengths. There are gas and gas/CNG 6.0-liter V-8s, but the 6.6-liter Duramax turbo-diesel with 910 lb-ft and the Allison six-speed automatic is the one to get. Trim levels range from work truck to high roller. The 3500HD strikes us as a gentle giant, with a quiet cabin, smooth ride, and quick steering.