Most recent Chevrolet Impalas use Dexron VI automatic transmission fluid, but older models commonly specified Dexron II/III. Always verify the exact specification for your year and transmission in the owner's manual or by checking the transmission’s dipstick label.
Fluid specifications by era
Recent models (2014–2020): Dexron VI is standard
GM standardized Dexron VI for its modern automatic transmissions, including the Impala’s popularity during this period. The owner’s manual and the transmission dipstick for 2014–2020 Impalas typically specify Dexron VI as the required fluid. Here are the key points to keep in mind:
- Dexron VI is the recommended fluid for 2014–2020 Impalas with the 6-speed automatic transmissions (such as 6T40/6T70 variants).
- Dexron VI is backward compatible with older Dexron I/II/III specifications, and many service outlets will use Dexron VI as the replacement fluid.
- Avoid mixing fluids unless GM explicitly allows it for your specific model/year; always top off with the same Dexron specification.
Bottom line: For the 2014–2020 Impala, Dexron VI is the recommended and commonly used fluid. Verify with your manual for the exact specification on your vehicle.
Older generations (roughly 1997–2010): Dexron III-H commonly specified
Earlier Impalas that used the 4T60-E or 4T65-E transmissions typically called for Dexron III-H (or Dexron II/III in some service guides). Dexron VI is backward compatible in many GM transmissions, and service shops often use it as a replacement when GM approval exists for the year and model. The exact specification, however, depends on your car’s year and transmission code.
- Dexron III-H is commonly cited for late-1990s to mid-2000s Impalas with 4T60-E/4T65-E transmissions.
- Dexron VI can be used as an approved replacement in many cases, but confirm the exact spec for your year and transmission with a GM dealer or the owner’s manual.
In short, older Impalas typically required Dexron III-H, with Dexron VI available as a backward-compatible option in accordance with GM guidelines and your vehicle’s specific year.
How to verify the correct fluid for your vehicle
To avoid missteps, use these verification steps tailored to your exact car:
- Consult the owner’s manual section on transmission fluid to confirm the correct Dexron specification for your model/year.
- Inspect the transmission dipstick label or the underside of the fuel/engine bay label for the recommended fluid type.
- Contact a Chevrolet dealership or certified shop with your VIN to confirm the precise specification for your exact year and transmission code.
Verifying the specification ensures you use the correct Dexron version and helps prevent transmission issues from using an improper fluid.
Summary
In summary, Dexron VI is the current standard for most modern Chevy Impalas (notably the 2014–2020 models with 6-speed automatics). Older Impalas, produced roughly from the late 1990s to around 2010, typically required Dexron III-H, with Dexron VI available as a backward-compatible replacement in many cases. Because the exact fluid depends on the year and transmission type, always check the owner’s manual, the dipstick label, or consult a GM service representative to confirm the correct specification for your vehicle.