Looks like the rear of the pump! It is very hard to see for sure, but it looks like the seal in the rear of the pump is leaking. I have had the fluid boil over, so I guess that caused it. Hot TX summers and Autocross events are hard on the steering.

Has anybody tried to replace the pump or repair? How bad a job is it? It looks like it is going to be fun....

2001 Z06 with 67,000 miles on it.

 

Parts are unavailable so repair is unlikely..And GM sells you a rebuilt pump with a core charge.. List around $300...
Best I could do was about $240 shipped from Fred Beans.

 

How bad of a DIY is it?

 

You will need a pulley puller. Destroyed my pulley trying to get it off..
If you get the pulley off its easy from there, but if you cant get the pulley off...
I found the easiest way then is to remove the whole Alt./pump bracket because the pump bolts are near impossible to reach with the pulley on..
HTH

 

Here are the instructions for replacing the pump:

Power Steering Pump Replacement
Removal Procedure
Remove the Brake Pressure Modulator Valve (BPMV). Refer to Brake Pressure Modulator Valve (BPMV) Replacement in Antilock Brake System.
Remove the Brake Pressure Modulator Valve (BPMV) bracket. Refer to Brake Pressure Modulator Valve (BPMV) Bracket Replacement in Antilock Brake System.
Remove the power steering fluid reservoir. Refer to Remote Power Steering Fluid Reservoir Replacement .
Remove the power steering pump pulley. Refer to Power Steering Pulley Replacement .
Remove the power steering reservoir outlet pipe/hose from the power steering pump. Refer to Power Steering Reservoir Outlet Pipe/Hose Replacement .
Remove the power steering pressure hose from the power steering pump. Refer to Power Steering Pressure Hose Replacement .



Remove the power steering pump mounting bolts (3) from the power steering pump (2).
Remove the following components from the power steering pump rear bracket (1):
The power steering pump front bracket (3).
The power steering pump (2).
Installation Procedure




Install the following components to the power steering pump rear bracket (1):
The power steering pump (2).
The power steering pump front bracket (3).

Notice
Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.


Install the power steering pump mounting bolts (4) to the power steering pump (2). Tighten
Tighten the bolts to 25 N·m (18 lb ft).

Install the power steering reservoir outlet pipe/hose to the power steering pump. Refer to Power Steering Reservoir Outlet Pipe/Hose Replacement .
Install the power steering pressure hose to the power steering pump. Refer to Power Steering Pressure Hose Replacement .
Install the power steering pump pulley. Refer to Power Steering Pulley Replacement .
Install the power steering fluid reservoir. Refer to Remote Power Steering Fluid Reservoir Replacement .
Install the Brake Pressure Modulator Valve (BPMV) bracket. Refer to Brake Pressure Modulator Valve (BPMV) Bracket Replacement in Antilock Brake System.
Install the Brake Pressure Modulator Valve (BPMV). Refer to Brake Pressure Modulator Valve (BPMV) Replacement in Antilock Brake System.
Bleed the power steering system. Refer to Bleeding the Power Steering System .