GMC 1996 Sierra Owner's Manual page 273

How to Add Fluid
Here's how to add fluid. Refer to the Maintenance
Schedule to determine what kind of fluid to use. See
"Recommended Fluids and Lubricants" in the Index.
1. Remove the filler plug.
2. Add fluid at the filler plug hole. Add only enough
fluid to bring the fluid 1evel.u~ to tbe bottom of the
filler plug hole.
3. Install the filler plug. Be sure the plug is fully seated.
Hydraulic Clutch
The hydraulic clutch system in your vehicle is
self-adjusting. A slight amount of play (1/4 inch to
1/2 inch or 6 mm to 12 mm) in the pedal is normal.
It isn't a good idea to "top off' your clutch fluid.
Adding fluid won't correct a leak. A fluid loss in this
system could indicate a problem. Have the system
inspected and repaired.
When to Check and, What to Use
Refer to the Maintenance
Schedule, Owner Checks
and Services, to determine
how often you should
check the fluid level.in
your clutch master cylinder
reservoir and for the proper
fluid. See "Owner
Checks and Services" and
"Recommended Fluids and
Lubricants'' in the Index.
How to Check
The proper fluid should be added if the level does not
reach the bottom of the diaphragm when it's in place in
the reservoir. See the instructions on the reservoir cap.
6-23