2004 Chevrolet Aveo Owner's Manual - Page 219

4. With the coolant surge tank pressure cap off, start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fan. By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower than the MAX (A) mark, add more of the proper mixture to the coolant surge tank until the level reaches the MAX (A) mark. 3. Fill the coolant surge tank with the proper mixture to the MAX (A) mark on the coolant surge tank. Wait about five minutes, then check to see if the level is below the MAX (A) mark. If the level is below the MAX (A) mark, add additional coolant to bring the level up to the MAX (A) mark. Repeat this procedure until the level remains constant at the MAX (A) mark for at least five minutes. 5. Then replace the pressure cap. Be sure the pressure cap is hand-tight and fully seated. See your dealer, if necessary. 5-33