Buick 2003 Century Owner's Manual page 253

When to Check Power Steering Fluid
It is not necessary to regularly check power steering fluid
unless you suspect there is a leak in the system or
you hear an unusual noise. A fluid loss in this system
could indicate a problem. Have the system inspected
and repaired. See Engine Compartment Overview
on page 5-12 for reservoir location.
How to Check Power Steering Fluid
Turn the key off, let the engine compartment cool down,
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.
When the engine
compartment is hot,
the level should be at
the H (hot) mark. When
it's cold, the level should
be at the C (cold) mark.
If the fluid is at the
ADD mark, you should
1
add fluid.
What to Use
To determine what kind of fluid to use, see Part D:
Recommended Fluids and Lubricants on page 6- 16.
Always use the proper fluid. Failure to use the proper
fluid can cause leaks and damage hoses and seals.
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