When adding fluid to the hydraulic clutch system, use only hydraulic clutch fluid, GM part number 12345347, or equivalent.
See Figures 1, 2 and 3
The clutch master cylinder is normally located below the brake master cylinder. The reservoir for it is located right beside the brake master cylinder and is made of translucent nylon. The fluid level of the reservoir should be kept near the top of the observation window. Before removing the cap to the reservoir, clean all dirt from the area. This will prevent system contamination due to particles falling into the reservoir when the caps are removed.