2016 Chevrolet Silverado 1500: Transmission Fluid & Service

Quick answer

• Transmission make/model: GM 6L80 (6-speed automatic), GM 8L90 (8-speed automatic)
• OEM fluid spec: DEXRON-VI
• Drain & fill capacity: 6L80: Approx. 6.0 quarts; 8L90: Approx. 8.5 quarts
• Full overhaul capacity: 6L80: 12.4 quarts; 8L90: 11.4 quarts
• Filter OEM part number: Verify with dealer or service manual.
• Recommended service interval: Normal: 90,000 miles; Severe: 45,000 miles

Fluid type explained

The 2016 Chevrolet Silverado 1500 came equipped with one of two automatic transmissions: the 6-speed 6L80 or the 8-speed 8L90. Both transmissions require DEXRON-VI automatic transmission fluid (ATF). This is a synthetic fluid with specific frictional properties and viscosity characteristics designed for modern GM transmissions. Using a fluid other than DEXRON-VI can lead to poor shifting, overheating, and premature transmission failure.

Service procedure

There are two common methods for servicing your transmission fluid: a drain and fill, or a full fluid exchange. A drain and fill involves draining the transmission fluid from the pan, replacing the filter, and refilling with fresh fluid. This method is less expensive but only replaces about half of the total fluid in the transmission. A full fluid exchange uses a machine to pump out all of the old fluid while simultaneously refilling with fresh fluid. This method is more expensive but ensures that all of the old, contaminated fluid is removed. For the 2016 Silverado, a drain and fill is the more common and generally recommended procedure, especially when done at the proper interval.

Service interval

For normal driving conditions, the recommended service interval for the 2016 Chevrolet Silverado 1500 is every 90,000 miles. However, for severe duty or towing, the recommended interval is shortened to every 45,000 miles. Severe duty includes frequent towing, heavy hauling, driving in dusty conditions, or extensive idling. If you use your truck for work, it is likely that you fall into the severe duty category.

Common transmission problems

The 6L80 and 8L90 transmissions in the 2016 Silverado are generally reliable, but they are not without their issues. Some common problems include:

• Harsh shifting: Some owners have reported harsh or delayed shifting, especially when the transmission is cold. This can sometimes be resolved with a software update from the dealer, but it can also be a sign of a more serious internal problem.
• Torque converter failure: The torque converter is a fluid coupling that connects the engine to the transmission. In some cases, the torque converter can fail, causing a shudder or vibration when driving. This is a major repair that requires removal of the transmission.
• Fluid leaks: Like any transmission, the 6L80 and 8L90 can develop fluid leaks over time. Common leak points include the pan gasket, cooler lines, and output shaft seal. It is important to have any leaks repaired as soon as possible to prevent transmission damage from low fluid levels.

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