Surprisingly this is one of the simpler jobs on the SC.
1. Loosen lug nuts, jack up car, insert jack stand, remove wheel.
2. Loosen pinch bolt nut and back almost all the way off.
Hammer on the bolt till it pops out, finish removing the nut and remove the pinch bolt. Hammer the sides of the arm up until the stud pops out.
3. Knock the tabs off the frame bolts by knocking them back and forth with a screwdriver. To Loosen the bolts, you can reach behind the spring with an extension, socket, and ratchet. Use a backup wrench on the nut and a breaker bar on the ratchet (1/2" drive recommended). The only one which is tricky to get to is the rear nut on the passenger side. Go underneath and you can see it clear as day.
All you need is a little grip on the nut as its a backup wrench. It doesn't even need to fit tight.
4. Remove both bolts, remove the arm.
5. Install new arm and hammer balljoint stud into the spindle.
Do not torque the frame bolts just yet. Torque the pinch nut (Not the bolt!) to 60 lbs.
6. Raise the whole assembly by using a jack under the lower arm until the car just starts to come off the jack stand. Torque the frame bolts or nuts to 80 lbs.
7. lower the jack, install the wheel, lower the car, torque the lug nuts.
On the driver side, if you can't reach the front nut, you might have to move the washer reservoir out of the way. For the rear, just reach in below the HCU and feel around with a wrench.
That's it. About 1/2 hr per side if all goes well. I replaced the sway bar end links at the same time since the covers were split open, so it took me about 2 hrs total.