Looked like it was the alternator. I picked up a reman OEM one from Amazon. It's not that "big" of a job but it took several hours over a couple of days and definitely a lot of swearing. The tricky part is getting it out of there and re-installing the serp belt. I replaced mine with a Dayco one.
For Googlers hence, hello from 2019, there is another thread somewhere that mentions an "alternate method" of removing the radiator fan and pulling the alternator out from the front, leaving the bracket attached to the motor. That way seems easiest. The steps are:
1) Remove the engine cover and front intake bezel above the grille (a few 10mm bolts, many plastic rivets). Some rivets will break, get new ones from Amazon. They are 6.3mm plastic rivets.
2) Remove the air box top, with the mass airflow sensor wire attached, and just fold it back onto the engine out of the way.
3) Remove the air box bottom and intake plenum. The plenum comes out in 1 piece. I found it easiest to remove this *including* the hose clamp to the engine intake, otherwise it's difficult to fit the plenum back in with the small hose clamped piece still attached to the engine, which is the way it will want to come out at first try. It's some funky rubber gasket with slits that you have to force back into a collar. Best to leave it together.
4) Remove the radiator fan and shroud. This is also 1 piece. Two bolts at the top, left and right sides. On the bottom left and right, there are just plastic clips, release these with your finger (or a long screwdriver on the left side). Leave it plugged in, just lifts out and you can fold it back out of the way. You have to disconnect the large hose on the right side, either on the engine side or radiator side (the coolant bottle is also attached to this piece).
5) Un-tension the serpentine belt and remove the belt from the alternator pulley. I found it easiest to use a long breaker bar with the bar
down on the left side, at about the 9:00 position, and lift upwards as if you are tightening. The video in step 9 was helpful here too.
6) Remove the 14mm long bolts on the front of the alt, bottom and top.
7) Remove the ground strap near the left side of the alternator (two bolts). This is not necessary but gives you better access to the back.
8) Unclip the quick release plug from the alt, and push back the rubber hood from the other wire, unscrew the nut, pull off that wire.
9) Alternator can come off now, but you have to wiggle the shit out of it. Look at this video, around 3/4 the way in:
for the wiggle technique required. A pry bar with a flipped up end helps.
10) Lift it out through the front, being careful not to bang it on the radiator.
Install is the reverse of these steps. You can pretty much do the whole thing from the top. I had the bottom panels off anyway.
Before replacing I was getting around ~11v at the battery, now am getting ~14v and the discharge light is off...
