Power Steering Leak

[snowman]

I have a power steering fluid leak which appears to be coming from the reservoir. I checked the fluid at it was completely full. I drained a little, to the cold mark, and then drove to work. My reservoir is now empty. Anybody have some ideas?

 

[GMcLean]

seen lots of ps boxes with the four bolts on top loose

 

[SS]

Check your brakes with the engine off. Use a large empty parking lot, roll at 2-3 mph, shut off the engine and try to stop. If the brake pedal is hard immediately with no brake assist, then the compressed nitrogen cylinder (blue anodized color) on the brake master cylinder may have burst. Pressurized nitrogen in the lines forces p/s fluid out of the reservoir. As the nitrogen works it's way out of the system, the fluid level will read low again. Something else to check.