Rear Axle - Chevrolet 2000 Corvette Owner's Manual

How to Check and Add Fluid
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. Put the rubber seal and
cap back on.
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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.
How to Check Lubricant
If the level is below the bottom of the filler plug hole,
you'll need to add some lubricant. Add enough lubricant
to raise the level to the bottom of the filler plug hole.