Most newer GM's take Dexcool, which is orange. But if it was green before then use green coolant. Mixing the two can be very bad for your cooling system.
Dexcool
it take dexcool its a orange antifreeze that is approved by gm.
It takes the green Antifreeze
How much antifreeze does a 1998 chevy mabilu ls take
Dexcool
Green
what do you need to take off car to get to c/shaft pulley on 2001 malibu
The amount of antifreeze a Chevy Malibu requires varies by model year and engine type, but generally, it takes about 6 to 8 quarts of coolant. For a more precise figure, it's best to check the owner’s manual or consult with a dealership for your specific model. Additionally, using the correct type of antifreeze is crucial for optimal performance and engine protection.
Dex cool
Antifreeze is a standard item, but be sure to mix it with water 50/50.
a 3.1 v6 it takes 5w30
Dexcool or some call it Deathcool.