The quick answer: Dexron VI automatic transmission fluid is the recommended specification for most 2009 Malibu models. The exact requirement can vary by transmission type and engine, so confirm with the owner’s manual or a GM dealer. In practice, Dexron VI covers the vast majority of configurations.
Understanding the transmissions in the 2009 Malibu
Chevrolet offered multiple automatic transmissions in the 2009 Malibu lineup. The fluid specification you need depends on which transmission is in your car. While some trim levels used a four-speed automatic in the 4T40-E/4T65-E family, others used GM’s newer six-speed designs (6T40/6T45). Dexron VI is the standard for these GM automatics, with Dexron II/III listed as acceptable only if Dexron VI isn’t available, and for long-term use not recommended.
Four-speed automatics (4T40-E/4T65-E)
For four-speed GM automatics commonly found in older Malibu configurations, Dexron VI is the recommended ATF. If you only have Dexron II/III on hand, you can use it temporarily, but plan to service with Dexron VI as soon as you can, because shifting quality may degrade over time.
Six-speed automatics (6T40/6T45)
For six-speed GM automatics, Dexron VI remains the standard specification. Use Dexron VI ATF from a reputable brand; avoid mixing in older Dexron II/III for extended periods.
What to buy and how to confirm
When shopping, look for Dexron VI automatic transmission fluid labeled as such. You can choose conventional, synthetic blend, or full synthetic Dexron VI, as long as the label states Dexron VI (or Dexron VI H for certain synthetic variants). If in doubt, choose a GM-licensed Dexron VI product like ACDelco Dexron VI.
Always verify the exact specification for your vehicle using the owner's manual, the inside of the glove box, or by contacting Chevrolet support. If you recently serviced with a different ATF, ensure the level and quality are correct after the service.
Maintenance tips and service intervals
A typical drain-and-fill for GM automatics uses about 5–7 quarts, depending on the model and whether you drain the torque converter. A full flush can require more. Check your service schedule and use the recommended Dexron VI ATF. After refilling, check the level with the engine warmed up and the selector in Park, with the engine running as per the manual.
Summary
In summary, Dexron VI automatic transmission fluid is the standard recommendation for the 2009 Chevy Malibu across most transmissions. Dexron II/III can serve as a temporary substitute if Dexron VI isn’t available, but it’s not ideal for long-term use. Always confirm the correct specification for your exact transmission model via the owner's manual or Chevrolet dealer to ensure proper shifting and longevity.
Bottom line: Dexron VI is the go-to for a 2009 Malibu, but verify your specific transmission and follow the official guidance for best results.