Hydraulic Clutch - GMC SIERRA CK2 1999 Owner's Manual

Check the fluid level only when your engine is off, the
vehicle is parked on a level place and the transmission is
cool enough for you to rest your fingers on the
transmission case.
Then, follow these steps:
1. Remove the filler plug.
2. Check that the lubricant level is up to the bottom of
the filler plug hole.
3. If the fluid level is good, install the plug and be sure
it is fully seated. If the fluid level is low, add more
fluid as described in the next steps.
6-24
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 level up to the 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.
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