CHEVROLET 1999 Corvette - Manual (Page 271)

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When to Check and What to Use
Refer to the Maintenance Schedule 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 and Add Fluid
The clutch master cylinder is on the driver’s side of the
engine compartment, near the fender.
To check the fluid, remove the cap and rubber seal.
Fluid should be added if the fluid level is below the step
on the inside of the reservoir. There are additional
instructions on the reservoir cap.
Replace the rubber seal and cap.
Rear Axle
When to Check Lubricant
Refer to the Maintenance Schedule to determine how
often to check the lubricant. See “Periodic Maintenance
Inspections” in the Index.