What type of antifreeze for my 2006 Buick Lucerne?

The type of antifreeze that should be used in the 2006 Buick Lucerne is DEX-COOL with A50/50 mixture of clean, drinkable water. The capacity of antifreeze for the vehicle is 12.7 quarts for the initial fill. The coolant circulates through the engine to keep it from either overheating or freezing and helps to protect against rust and corrosion.. The antifreeze is meant to last for 5 years or 150,000 miles, whichever comes first. Whenever You add the fluid You first need to make sure that the engine is cool. The cost of it is between $11 and $20 depending on the brand and the store. The cost to get it changed is anywhere from $130 to $170 in labor costs.