Remember when Lexus had their advertising of a self-parking car? THAT was electric power steering, back them. All of the full-size GM pickups have had it for about 4 model years now, plus about 2 generations of Chevy Malibus. There were a few of the GM fwd cars that had electric pwr str on the 4cyls, but hydraulic on the V-6s. Possibly an EPA MPG thing?
The GM "MagnaSteer" power steering racks (in the 1990s) were neat in that after the basic "resistance/feel" of the rack was designed-in (default level), the magnets in the MagnaSteer input area could help ro resist the basic steering input to happen. With a GM scan tool, the basic vehicle-related "feel" could be varied, it was claimed. BUT on a consumer ride/drive on a then-new Buick Park Avenue, I experienced something that caused me to re-think that this was GM's premium-quality steering rack. In the slalom course, the target speed was 20mph. "Just drive as I watch your speed", the product guy said. Starting in the base Park Avenue, I was a little faster, but by the second cone, I was mowing over cones. Understeer. Next, it was the "upgrade suspension Ultra". By the 2nd cone, mowing over cones, but for a different reason. The quick steering inputs became jerky, not unlike the old "pump catch" on the hydraulic systems where things would lock-up momentarily. I made a surprised remark about this and the product specialist calmly said "The magnets aren't changing fast enough." I thought "WOW! This is the same-design rack used in Corvettes and no road test has mentioned it!"
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When I got to the New Yorker LHS, I still went faster than 20mph and cleared ALL of the cones. Just like it should have been! Just a better handling and driving car without any special electrical gadgets to help steer it.
Back then, most of the GM performance-oriented models had MagnaSteer, but the normal lines of the same platform didn't. After several years, MS was quietly not mentioned anymore.
Funny thing was that if the MS system was thought to be a performance issue on the vehicle, the TSB said to just unplug it and see if the problem disappeared. LOL.
There are also electric power steering columns in the street rod world, too. "Fly-By-Wire" throttles have been around much longer. I believe that similar steering systems are just waiting to happen, but probably some product liability concerns?
Everything's getting ready for the self-driving vehicles. Electric power steering, electronic throttle actuators, automatic braking, bumper/object proximity sensors, radar, and multiple cameras can be had NOW, even on pickups. Just needs a different software package to tie it all together.
Not sure about the issues/fixes in the noted recall. Just means that either component reliability or a "code" issue, I suspect. Be that as it may.
Enjoy!
CBODY67