Help with a squeaky clutch

[warcat]

Wasn't sure where to put this, but I've got what seems to be a simple problem that I need help fixing on my 1985 Jimmy. When I push the clutch in (and when I release it), with the truck off or on, I've got this annoying squeak. Well, two squeaks, one in the cab, and the other underneath the truck. When I push down... squeak in the cab... when I release... another squeak in the cab with a scratchy squeak underneath.

Is there something I can do to get rid of these squeaks?

Also, I've noticed the the clutch reservoir in the engine compartment is low. What brand/ type of fluid do I need to be putting in there?

I know these sound like simple questions, but I'm just not very mechanically inclined, and your help would be appreciated.

 

[Jason4x4]

regular brake fluid in the resevoir, try some wd 40 on the linkage under the dash.

 

[warcat]

Regular brake fluid in the reservoir... simple enough.

I've already tried WD-40 on the linkage, but it didn't work.