Clutch cap part number
 

I'm having a little problem finding one.

They are somewhat difficult to get ahold of. I had to do some digging not to long ago. Junk yard, GM parts direct, or getting a whole new assembly are your only options. Diagrams on on one of those might be your best bet, Rock auto I think might have had one. Other people said to just get reservoir GM parts direct was the only option. I didnt find any when I looked, so dealership maybe? If your replacing due to an air getting in you may be better off searching for the whole reservoir with a new cap. Could look at cavalier, sunfire, grandam ones are well, I'm sure there are others. Some have a twist on cap, other have the pop on pressure fit cap.

Wrong section, was typing on my cell phone..

But the gasket on my cap is starting to crack. I will try the dealer on monday.

Well the dealer said I had to get the whole thing, and part was discontinued...But it got hot and what ever water is gone now, and its working great. I know I could go to gmbuypower. But I'm passed winter right now.

Good to hear. I'm looking for clutches and flywheels right now and theirs just not much out there for our cars in general, let alone the standard trans ones.