2021 Chevrolet Equinox — Transmission Fluid & Service

Quick answer

• Transmission make/model: GM 6T40 (RPO MNH), GM 9T45 (RPO M3U)
• OEM fluid spec: DEXRON VI
• Drain & fill capacity: 4.2-6.3 quarts
• Full overhaul capacity: 8.5-9.5 quarts
• Filter OEM part number: Verify with dealer or service manual
• Recommended service interval: 45,000 miles

Fluid type explained

The 2021 Chevrolet Equinox uses General Motors' DEXRON VI automatic transmission fluid (ATF). This is a full-synthetic fluid that was introduced in 2005 to replace DEXRON III. DEXRON VI has a lower viscosity than its predecessor, which improves fuel economy. It is also more shear-stable, which means it is less likely to break down under the high temperatures and pressures inside an automatic transmission.

Service procedure

There are two main ways to service the transmission fluid in a 2021 Chevrolet Equinox: a drain and fill or a full fluid exchange. A drain and fill is the simpler and more common method. It involves draining the old fluid from the transmission pan and refilling it with fresh fluid. A full fluid exchange is a more involved process that uses a special machine to flush all of the old fluid from the transmission and replace it with new fluid. This is the preferred method for vehicles that are used for towing or have a high mileage.

Service interval

The recommended service interval for the transmission fluid in a 2021 Chevrolet Equinox is every 45,000 miles. However, this interval may need to be shortened if the vehicle is used for towing or other severe duty applications.

Common transmission problems

Some of the most common transmission problems with the 2021 Chevrolet Equinox include:

• Hesitation or slipping during shifts
• Harsh shifting
• Leaking fluid
• Overheating

If you are experiencing any of these problems, it is important to have your vehicle inspected by a qualified technician as soon as possible.

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