2021 Chevrolet Malibu Transmission Fluid & Service Spec

Quick answer

• Transmission make/model: GM 9T45 9-speed automatic (1.5L Turbo engine), GM CVT (2.0L Turbo engine)
• OEM fluid spec: Dexron HP (for 9T45), GM CVT Fluid (for CVT)
• Drain & fill capacity: 9T45: ~5-6 quarts; CVT: ~4-5 quarts. Always check the fluid level using the correct procedure.
• Full overhaul capacity: 9T45: ~9.5 quarts; CVT: ~7.5 quarts
• Filter OEM part number: Verify with dealer or service manual.
• Recommended service interval: Refer to owner's manual, typically 97,500 miles under normal driving conditions or sooner for severe duty.

Fluid type explained

The 2021 Chevrolet Malibu comes with two distinct transmission options, each requiring a specific fluid type. Understanding these differences is crucial for proper maintenance and longevity.

GM 9T45 9-speed automatic transmission

Paired with the 1.5L turbocharged engine, the 9T45 automatic transmission utilizes Dexron HP fluid. This is a highly specialized, low-viscosity synthetic fluid designed for modern GM transmissions. It offers numerous benefits, including improved fuel economy due to reduced internal friction, enhanced wear protection, and stable performance across a wide range of operating temperatures. Using any other fluid can lead to premature wear, shifting issues, and potential transmission failure. Always ensure that any fluid used explicitly states compliance with Dexron HP specifications.

GM CVT transmission

Vehicles equipped with the 2.0L turbocharged engine typically feature a Continuously Variable Transmission (CVT). This sophisticated transmission requires a dedicated GM CVT Fluid. CVT fluid is engineered to handle the unique stresses and friction requirements of the belt or chain and pulley system within a CVT. It provides the necessary friction modification for optimal belt grip while also offering cooling and lubrication properties. Never substitute conventional automatic transmission fluid (ATF) for CVT fluid, as this will lead to catastrophic transmission damage.

Service procedure

Proper transmission fluid service is vital. The procedure can vary depending on whether you're performing a simple drain and fill or a full fluid exchange.

Drain & fill

A drain and fill involves removing the drain plug, allowing the old fluid to drain out, and then refilling the transmission with new fluid to the correct level. This method only replaces a portion of the total transmission fluid, as a significant amount remains in the torque converter and other internal passages. For the 9T45, this typically replaces about 5-6 quarts, and for the CVT, around 4-5 quarts. While simpler, it doesn't completely remove all contaminants or degraded fluid. This method is often recommended for regular maintenance intervals.

Full fluid exchange (flush)

A full fluid exchange, often referred to as a "flush," involves using specialized equipment to remove nearly all of the old fluid and replace it with new. This method ensures that the entire system, including the torque converter, is filled with fresh fluid. While more comprehensive, it's debated in the automotive community whether a full flush is always beneficial, especially on high-mileage transmissions that haven't been regularly serviced. Some argue it can dislodge debris and cause issues. If considering a full fluid exchange, it