GMC 1994 Yukon Owner's Manual page 287

How To Check Power Steering Fluid
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
I
dipstick.
When the engine
compartment is
hot, the level
should be at the
FULL mark.
When the engine
compartment is
cool, the level
should be at the
FULL COLD
mark.
What to Add
Refer to the Maintenance Schedule to determine what kind of fluid to use.
See "Recommended Fluids and Lubricants'' in the Index.
NOTICE:
When adding power steering fluid or making a complete fluid
change, always use the proper fluid. Failure to use the proper
fluid can cause leaks and damage hoses and seals.
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