Pontiac 2004 GTO - Manual (Page 226)

Power Steering Fluid
When to Check Power Steering Fluid
See Engine Compartment Overview on page 5-12
for reservoir location.
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.
How to Check Power Steering Fluid
The fluid level should be checked after the vehicle has
been driven for at least 20 minutes, so that the fluid
is warm. A convenient time is when stopping for
gas. The cold level check should only be used after the
engine has not been running for at least five hours.
However, the hot level check is always recommended.
The fluid level can be viewed through the reservoir.
The level markings are next to the fluid window. When
the fluid is cold the level should be between the
COLD MIN and MAX marks; when the vehicle has been
driven for awhile and the fluid is hot the level should
be between the HOT MIN and MAX marks. If fluid must
be added, undo the cap counterclockwise to the
stop; then the cap can be lifted off. Do not overfill and
remember to replace the cap tightly. If you often need to
add fluid, you should see your dealer. Remember to
secure the cap when the level is correct and clean up
any spillage.
What to Use
To determine what kind of fluid to use, see
Recommended Fluids and Lubricants on page 6-13.
Always use the proper fluid. Failure to use the proper
fluid can cause leaks and damage hoses and seals.
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