Quadrasteer is the name of a four wheel steering system developed by Delphi Automotive while under the ownership of General Motors for use in automobiles. It was available as an option on GM's full-size pickup trucks and 2500 Suburbans for model years 2002 through 2005.
Such a system can be a useful feature to people who tow regularly, as it enables a person to turn their vehicle in tighter spaces than if they had a regular steering system. It added as much as $7,000 initially to the price of the vehicle. Through time, the cost was lowered to $5,600, $2,000 and eventually $1,000 in order to boost sales. The steering system was popular for people who frequently tow boats, fifth wheels, or other large equipment.
The system was primarily used on pickup trucks. At lower speeds, it turns in opposite direction of the forward wheels to a maximum of 15°, or 12° in trailer mode, decreasing the turning radius as much as 21%. At higher speeds the system will turn the rear wheels slightly in the direction of the front wheels so as to increase stability and control. The rear axle is based on the Dana 60 axle.
Vehicles that offered the upgrade include:
- Adlen, Nathan. "Truck Rewind: Chevy and GMC Quadrasteer - Turning on a Forgotten Dime - The Fast Lane Truck". www.tfltruck.com. Retrieved 2019-03-27.
- Andrew Ganz Senior Editor. "Rear-wheel steering could radically change pickup trucks and SUVs". The Car Connection. Retrieved 2019-03-27.CS1 maint: extra text: authors list (link)