Quadrasteer added substantial complexity to the beam axle (adding steering knuckles and outer CV joints, in addition to the obvious steering gear), in part explaining the cost. The lack of popularity would have been a combination of the cost, lack of recognition by buyers of the value of four-wheel steering (especially tech-adverse pickup truck buyers), and potential higher maintenance cost of the more complex system. Because the truck wasn't designed for rear steering, the Quadrasteer required wider rear track, which was good for stability but was undesirable to buyers otherwise.Four wheel steering is great, can't imagine why GM didn't think of that 20 years ago, and then implement it for 3 years, and then drop it.![]()
All of the EV pickups that are going into production (Rivian R1T, Ford Lightning, GMC Hummer EV, Chevrolet Silverado) or likely to actually make it (Ram 1500, maybe someday Bollinger?) have independent rear suspension, and so will require four-wheel alignment, with only toe likely to ever be adjusted.Bet alignments take a bit longer though.