1. Climb the face of the pillar to a ledge at its top. It's quicker, easier, and no less pleasant to solo up the right-facing corner on the right side of the pillar. 5.5 or 4th class, respectively, 40 feet.
2. From the right side of the ledge, go up and a bit right to several small, left-facing corners; these are 25 feet or so off the ledge. From the last of these, move over a bulge (crux) then go straight up to the GT ledge. The latest guidebook mentions mentions passing a piton; the only pin on this pitch is within arm's reach while you are standing on the ledge. 5.9, 60 feet.
3. Scramble up and left. Then move straight up the face past a small pod, pass to the left of a large flake and on to the top. 5.6, 100 feet.
The crux moves are a bit thin, but that section is not sustained. The climbing before and after is fairly easy. Two stars.
Location
At the left end of the Arrow wall area, just before the trail goes up and then back down to Thin Slabs. Look for a dirty, broken, right-facing corner that is approximately 40 feet high.
Protection
You'll need small cams, e.g., Metolious 00, 0, and 1 or the equivalent for the crux pitch. Otherwise, a standard 'Gunks rack will do.
Is the last pitch of Steep Hikin' left of the last pitch of Red Pillar? Yes, it is, and you could certainly link Steep Hikin' and Red Pillar. That would be a good idea; the top pitch of Red Pillar is much better.