Chevrolet 1998 Lumina Owner's Manual page 265

How To Check Power Steering Fluid
When the engine compartment is cool, wipe the cap and
the top of the reservoir clean, then unscrew the cap and
wipe the dipstick with a clean rag. Replace the cap and
completely tighten it. Then remove the cap again and
look at the fluid level on the dipstick.
For the 3100 engine, when
the engine compartment is
hot, the level should be at
the H mark. When it's cold,
the level should be at the
C mark. If the fluid is at
the ADD mark, you
should add fluid.
For the 3800 engine, the
level should be at the HOT
mark when the engine
compartment is hot. If the
fluid is at the ADD mark,
you should add fluid.
What to Use
To determine what kind of fluid to use, see
"Recommended Fluids and Lubricants" in the Index.
Always use the proper fluid. Failure to use the proper
fluid can cause leaks and damage hoses and seals.
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