2024 Chevrolet Equinox: Transmission Fluid & Service

Quick answer

• Transmission: General Motors 6T40 6-speed automatic
• OEM fluid spec: DEXRON VI
• Drain & fill capacity: 4.2–6.3 quarts (4.0–6.0 liters)
• Full overhaul capacity: 9.5 quarts (9.0 liters)
• Filter OEM part number: Verify with dealer (internal filter)
• Recommended service interval: 45,000 miles (severe), 90,000 miles (normal)

Fluid type explained

The 2024 Chevrolet Equinox is equipped with the GM 6T40 6-speed automatic transmission. This transmission requires DEXRON VI automatic transmission fluid. Using any other type of fluid can lead to poor shift quality, internal damage, and potential transmission failure. DEXRON VI is a synthetic fluid designed for long service life and consistent performance in a wide range of temperatures. It provides excellent friction stability, oxidation resistance, and anti-wear protection for modern automatic transmissions.

Service procedure

There are two common methods for servicing the transmission fluid:

• Drain and fill: This is the most common and straightforward service. The technician removes the drain plug, allowing about half of the old fluid to drain out. The plug is replaced, and the transmission is refilled with new fluid. While this doesn't replace all the fluid, it introduces fresh fluid and additives, which is sufficient for most situations.

• Fluid exchange: This procedure uses a specialized machine to pump out nearly all the old fluid from the transmission, torque converter, and cooler lines while simultaneously refilling it with new fluid. This is a more complete service but is also more expensive and not always necessary.

The 6T40 transmission has an internal filter that is only accessible during a full transmission overhaul. It is not a regularly serviced item. Therefore, a standard drain and fill is the typical service performed.

Service interval

Your service interval will depend on your driving habits:

• Normal duty: For most drivers, a transmission fluid service is recommended every 90,000 miles.

• Severe duty: If you frequently tow, drive in heavy city traffic, or operate in mountainous terrain, you should follow the severe duty schedule. This calls for a fluid change every 45,000 miles to ensure the transmission remains protected under the extra strain.

Common transmission problems

The 6T40 is a widely used transmission with a generally reliable track record. However, some earlier versions of this transmission family experienced issues. For this newer generation, watch for:

• Shift flares or harsh shifting: This can sometimes be a sign of low fluid, worn fluid, or a software issue. A fluid change is a good first step in diagnosing the problem.
• Slipping: If the transmission seems to slip between gears, it can indicate internal wear. This is less common on well-maintained, newer vehicles but can be accelerated by using the wrong fluid or neglecting service.
• Torque converter issues: Problems with the torque converter can sometimes manifest as a shudder or vibration, especially under light acceleration. Software updates have addressed this in some cases.

Regularly checking your transmission fluid level and adhering to the recommended service intervals are the best ways to ensure a long life for your Equinox's transmission.

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