to Offer Four Wheel Steering Option in Full Size Truck for 2002 Model
General Motors announced
it will be the first manufacturer to offer an optional four-wheel steering
system on a full-size truck product. Delphi Automotive’s innovative QuadraSteer
four-wheel steering system will debut on a future GM full-size truck in
the 2002 model year.
In GM and Delphi
testing on full-size pickups and SUVs, QuadraSteer reduces the minimum
turning circle diameter by an average of 20 percent. In fact, one GM full-size
truck’s turning diameter was reduced from 46.2 feet (14.08 meters) to
37.4 feet (11.40 meters), making it comparable to a Saturn Coupe’s turning
diameter at 37.1 feet (11.31 meters).
In addition, this
technology gives added control to drivers that trailer. During low-speed
towing maneuvers, such as backing into a boat launch or parking a camper,
QuadraSteer greatly improves the trailer response to steering input.
is an electronic rear-wheel steering system that supplements the conventional
front-wheel steering system. It allows for greater maneuver-ability while
driving or trailering at low speeds
while improving stability,
handling and control at higher speeds. The system also enhances vehicle
stability at highway speeds as it helps the driver compensate for wind
turbulence encountered when the vehicle is passed by a large truck.
The system operates
in three ways. At lower speeds, the rear wheels turn in the opposite direction
of the front wheels. At moderate speeds, the rear wheels remain straight.
At higher speeds, the rear wheels turn in the same direction as the front
What Other Affects
Does QuadraSteer Have on a Truck?
The QuadraSteer adds
approximately 100-150 lbs. extra weight to the truck and requires a beefier
9.5" rear axle, as opposed to the 8.5" rear axle normally found
on GM's conventionally steered trucks.
In durability testing
GM claims to have found no unusual wear or tear on the QuadraSteer's rear
joints even after towing heavy loads for extended periods.
Though GM won't say
which truck will receive the QuadraSteer, we are laying odds on the GMC
made its appearance, earlier this year, on the GMC Terraydyne
concept truck at the North American Intenrational Auto Show.
GM has signed an
exclusive contract with Delphi to use its QuadraSteer technology for an
undisclosed period of time.