The 2014 Buick LaCrosse uses Dexron VI automatic transmission fluid for its GM 6-speed automatic transmission.
Fluid specification and compatibility
The LaCrosse, powered by the 6T70 family of transmissions, requires Dexron VI ATF as specified by GM. Dexron VI is backward-compatible with older Dexron formulations, but it is the recommended grade for this transmission. Avoid using Dexron II or III unless GM explicitly approves them for your VIN, and never mix ATF types or use non-ATF lubricants in the transmission.
Common options that meet the Dexron VI specification include a range of manufacturer-branded Dexron VI ATFs. The label on the bottle should clearly read Dexron VI to ensure compatibility with GM transmissions.
Below are widely available Dexron VI ATF options you can consider. Confirm compatibility with your vehicle and local regulations.
- GM Dexron VI Automatic Transmission Fluid (OEM-equivalent)
- Mobil 1 Synthetic Dexron VI ATF
- Castrol Transmax Dexron VI ATF
- Valvoline Dexron VI ATF
- Royal Purple Dexron VI ATF
All fluids listed meet the Dexron VI specification and are formulated for GM automatics. Check the label to ensure the product is Dexron VI and follow the vehicle's service instructions. If you’re unsure, consult a Buick dealer or a certified mechanic.
Capacity, service and maintenance
Transmission fluid capacity for a typical drain-and-fill on the 6T70 family is commonly around 9 to 11 quarts; a full service that includes flushing or replacing the torque converter can require more. Exact quantities vary by model year, whether the pan screws are replaced, and other service steps performed.
For maintenance, use the owner’s manual or a dealer’s service bulletin to determine intervals. GM generally recommends inspecting fluid level and condition at regular service intervals and replacing the ATF at intervals appropriate for your driving conditions. Driving in severe conditions—towing, heavy loads, or frequent high-heat operation—may warrant more frequent changes.
Why the right fluid matters
Using Dexron VI ATF helps ensure proper gear engagement, smooth shifts, and long-term durability of the LaCrosse’s transmission. Using older Dexron formulations or other types of fluids can cause erratic shifting, increased heat, and accelerated wear.
Important reminders
Always verify fluid requirements in your specific vehicle's owner's manual or with a Buick dealership, particularly if you have a different transmission variant or recent service history. Do not substitute with other lubricants or mix fluids unless GM specifies compatibility for your VIN.
Summary
The official specification for a 2014 Buick LaCrosse is Dexron VI automatic transmission fluid. When topping up or changing ATF, choose a Dexron VI-rated fluid and follow GM’s service guidelines for your vehicle.