How much transmission fluid do you put in a 91 Chevy lumina?

CAPACITIES
Engine, with filter..........4.0 quarts[1]
Cooling System, W/ Rear AC Initial Fill..........15.0 quarts
Cooling System, W/O Rear AC Initial Fill..........13.0 quarts
Automatic Transmission, 3T40 Initial Fill..........4.0 quarts[2]
Automatic Transmission, 4T60E Initial Fill..........6.0 quarts[2]
Automatic Transmission, Total Fill
3 speed 3T40..........7.0 quarts

1. After refill check oil level.
2. With engine at operating temperature, shift through all gears.
Let engine idle in PARK for at least 3 minutes.
CK level and add fluid as needed. Do not overfill.