The 2009 Buick LaCrosse typically uses Dexron VI automatic transmission fluid (ATF) that meets GM Dexron VI specifications, or a GM-approved power steering fluid labeled to Dexron VI. Confirm the exact requirement in your owner's manual or with a dealer if you’re unsure.
Fluid specifications for the LaCrosse’s hydraulic power steering
Here are the fluids commonly accepted for the hydraulic power steering system on 2009 LaCrosse models. Using the correct fluid helps ensure smooth steering and avoids damage to the pump and seals.
- Dexron VI automatic transmission fluid (ATF) that meets GM Dexron VI specifications
- GM-approved power steering fluid that explicitly meets Dexron VI specification
When in doubt, choose Dexron VI ATF or a GM-approved PS fluid that states it complies with Dexron VI. Mixing fluids or using non-approved fluids can degrade steering performance or cause leaks over time.
How to check and replace the power steering fluid
If you need to top up or replace the hydraulic power steering fluid, follow these steps carefully to avoid introducing air into the system or causing damage.
- Park the car on level ground, engine off, and allow the engine to cool. Open the hood and locate the power steering reservoir.
- Clean the reservoir cap and surrounding area to prevent dirt from entering the system, then remove the cap.
- Check the fluid level on the dipstick or markings on the reservoir. If it’s low, add fluid slowly until it reaches the MAX mark.
- Use Dexron VI ATF or a GM-approved Dexron VI PS fluid. Do not mix with other types of fluids unless explicitly approved by GM.
- With the engine running and the wheels straight ahead, turn the steering wheel from lock to lock a few times to circulate the new fluid and remove air. Check for smooth operation and listening for any whining noises.
- Inspect for leaks around the reservoir, hoses, and pump. If leakage or unusual noise persists, consult a qualified mechanic.
Note: If your LaCrosse uses electric power steering (EPS) in a given market or trim, you may not service with hydraulic PS fluid. Always verify the steering system type before opening the reservoir.
Tips and caveats
Using the wrong fluid or contaminating the system can cause damage and costly repairs. Keep the vehicle on level ground, avoid overfilling, and replace the fluid at intervals recommended by GM or your vehicle’s manual. If you’re unsure about the type or the procedure, seek professional help.
Summary
For the 2009 Buick LaCrosse with hydraulic power steering, the recommended fluid is Dexron VI ATF or a GM-approved power steering fluid that meets Dexron VI specifications. Always verify with the owner’s manual or dealer guidance. Properly maintained fluid levels and correct fluid type help ensure reliable steering performance and longevity of the steering system.
What kind of power steering fluid does a 2007 Buick LaCrosse take?
Prestone Power Steering Fluid 12 Ounce - AS260.
Ask More
What kind of power steering fluid do I need for a 2005 Buick LaCrosse?
(Part No. AS260) Prestone Power Steering Fluid (PSF) delivers increased system life. Designed with Anti-wear System Protection, Prestone PSF protects against pump failure, squeals and clogs.
Ask More
Does it matter which power steering fluid you get?
Yes, there is. Make sure you also check the service information for that on when it should be replaced, but just keep in mind that some vehicles, they have a unique formulation of power steering fluid.
Ask More
What year is a bad Buick LaCrosse?
Quick Answer: Buick LaCrosse Years to Avoid & Best Years
⚠️ Years to Avoid:2005, 2006, 2008, 2010, and 2011. Why? The 2005–2008 models suffer from frustrating electrical gremlins and steering issues.
Ask More