"Dually Is a must for stability pulling the big loads.
Wouldn't pull large 5th wheel with anything else. Don't
even know you have a load behind it pulls so smooth. Grades in mountains are a snap. Love the truck but can't travel any more so will sell it."
"This truck is hardworking and never balks, no matter what you throw at it. I've hauled trailers with this beast, turned around, filled the back with band equipment, turned around again, and used it as a highway cruiser. For my money, there is no better truck on the market than this big, bad GMC."