Other new features are a longer wheelbase and a wider track. They complement the heavier, stiffer frame with more cross members. The frames have five times more torsional strength than that of last year's models. New dual front jounce bumpers, shock mounts, hydraulic body mounts and new larger springs and retuned shocks are standard. Also standard is a revised steering system that includes a much larger steering gear, larger power steering pump and linkages. Much of this was done to better accommodate front-mounted snowplows.
The truck has a sway control system that senses the trailer sway and intervenes with braking or less engine power to bring the trailer under control. The truck has hill start assist that is automatically engaged when sensors detect that the vehicle is on a grade of 5% or greater. It holds the brakes for 1.5 sec. or until the gas pedal is pressed, preventing rollback. Cold-weather customers will appreciate the diesel's quick glow plug cycle time, which takes no more than 3 sec. in -20° weather.
Many warnings in the manual advise the owner not to modify the engine, transmission, or emissions control systems. All three are highly computerized and the computers are intertwined with each other. The owner's manual also cautions that idling the engine for long periods of time may cause more soot buildup in the catalytic converter, resulting in more frequent need for regeneration. The manual says that, when regeneration needs to be done, the owner should drive the truck at least 30 mph for more than 20 min. and cautions driving the truck around combustible material at that time due to the extremely high temperatures generated in the exhaust system.
The information center on the dash displays engine hours, fuel range, fuel used and transmission temperatures. It also gives warnings about urea left in the tank and tells when the engine needs regeneration. When the exhaust fluid tank is empty, the engine will go no faster than 55 mph. At the next diesel fuel fill — if the driver neglects to add urea fluid — the top speed will be limited to 4 mph.