Buick LaCrosse: When to Check Power Steering 
Fluid - Power Steering Fluid (3.6L V6 Engine) - Vehicle Checks - Vehicle Care - Buick LaCrosse Owners ManualBuick LaCrosse: When to Check Power Steering Fluid

It is not necessary to regularly check power steering fluid unless a leak is suspected in the system or an unusual noise is heard. A fluid loss in this system could indicate a problem. Have the system inspected and repaired.

    Power Steering Fluid (3.6L V6 Engine)
    See Engine Compartment Overview for information on the location of the power steering fluid reservoir. ...

    How to Check Power Steering Fluid
    Check the level after the vehicle has been driven for at least 20 minutes so the fluid is warm. To check the power steering fluid: 1. Turn the ignition to LOCK/OFF and let the engine compartme ...

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