Machine description: V8 6.6 L Diesel Engine, Automatic Transmission, 4800 lb Front Axle, 8550 lb Rears, 11400 lb GVWR, 235/85R16, Spring Suspension, 168 in Wheelbase, 8 ft 7 in x 90 in Bed MECHANICAL ISSUES PLEASE SEE DEF... more info about the 2001 GMC 3500.