I know there are other threads about Electronic Power Steering, but I could not find anything about this specific EPS rack. Its off a 2013 Buick Lacrosse and I grabbed it up this weekend from my local Pick n Pull. I was able to get the wire harness from the power supply to the rack but the harness that was attached to the engine was cut. I'm sure that was all the wires that went to the BCM/ECM to control it. Has anyone looked into this rack. I like that the EPS unit is attached to the rack vs. attached to the steering column. No issues w/ installing it under the dash.






When i put the rack on top of my pulled 88 front you can see the the rack is w/in 1 inch of being the same size. End to end its an exact fit. Two issues are the rack boss's are way different and will require cutting off the stock rack mounts, and the other is the angle of the steering rack to steering column, it looks way off. I could create the mounts w/ a 45 deg angle that would help the steep angle, but its also off left/right too.

if anyone has any idea about the electrical, i'd appreciate any help.

Rob

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88 Coupe, CJB #95, LS376, F40 and a GT clip
88 GT "Daily Driver" w/ SIII 3800 NA

https://drive.google.com/fi...qlX/view?usp=sharing

Hopefully this helps some

-Mitch

[This message has been edited by mitchjl22 (edited 09-03-2017).]

Is the Lacrosse a front steer (rack in front of the axle) or rear steer (behind the axle)?
Based upon the pics, it looks like the steering rack is going to move in the wrong direction.
I hope I'm wrong. It would be nice to see other options for PS in our cars.

I'm presently retrofitting a Trans Am rack to one of my cars. It has all the same issues that yours does. I'll have to remove the stock mounts, and fabricate a plate at 45 degrees for the rack to bolt to.

Edit - Everything I've found seems to indicate that the Lacrosse rack (same as the Impala) is mounted behind the cross member.

[This message has been edited by Raydar (edited 09-03-2017).]

Yes, I think it was. I assume that the steering column turns left, but the motor gets the input and pushes the rack to the right. Because its behind the cross member by pushing right its moving the spindle counter-clock wise, which is turning left. if i put it in front of the cross member if i turn left the rack will push the front of the Fiero spindle clockwise, turning right. Is this correct? Can't i just reverse something so that left is left, right is right?

Rob

quote Originally posted by qwikgta: Yes, I think it was. I assume that the steering column turns left, but the motor gets the input and pushes the rack to the right. Because its behind the cross member by pushing right its moving the spindle counter-clock wise, which is turning left. if i put it in front of the cross member if i turn left the rack will push the front of the Fiero spindle clockwise, turning right. Is this correct? Can't i just reverse something so that left is left, right is right? Rob

It's not that easy.
The only way it will work, is if you switch to right hand drive, and flip the rack over. The motor just provides the assist. It still depends upon the gears.
For any rack you choose, the pinion shaft (aka steering shaft) must be below the sliding rack part, in order for it to work correctly.

[This message has been edited by Raydar (edited 09-03-2017).]

quote Originally posted by Raydar: For any rack you choose, the pinion shaft (aka steering shaft) must be below the sliding rack part, in order for it to work correctly.

This, or get used to turning clockwise to go left, counterclockwise to go right!

You don't need perfect alignment between the steering column and the rack's input shaft. The U-joints will accommodate angle errors. Visually, it looks like there would be about a 20° angle on the lower U-joint; kind of a lot, but I would try it like that.

I thought about this some more... the pinion being over/under the rack depends on whether the tie-rods are ahead or behind the ball joints.