* 4L60E: The capacity is typically around 7-8 liters (including the torque converter). However, it's crucial to check your owner's manual for the exact amount. Always drain and refill the transmission several times to get most of the old fluid out for a complete fluid change.
* 4L65E: The capacity is generally slightly higher than the 4L60E, possibly around 8-9 liters (again including the torque converter). Again, consult your owner's manual for precise figures.
It's absolutely vital to check your owner's manual to determine which transmission your Avalanche has and the specific fluid capacity. Using the wrong amount of fluid can damage the transmission.
