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.