2005 Chevrolet Cobalt Owner's Manual - Page 253
2005 Chevrolet Cobalt Manual
Page 253 highlights
By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower than the COLD FILL line, add more of the proper mixture to the coolant surge tank until the level reaches the COLD FILL line. 5. Then replace the pressure cap. Be sure the pressure cap is hand-tight and fully seated. See your dealer, if necessary. 2.0L L4 Supercharged Engine If no coolant is visible in the coolant surge tank, you will need to either see your dealer or refer to the Dealer Service Manual for a special coolant service fill procedure to ensure enough coolant is added. To purchase a service manual, see Service Publications Ordering Information on page 7-11. 3. Fill the coolant surge tank with the proper mixture, to the COLD FILL line on the tank. Wait about five minutes, then check to see if the level is below the COLD FILL line. If the level is below the line, add additional coolant to bring the level up to the line. Repeat this procedure until the level remains constant at the COLD FILL line for at least five minutes. 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. Windshield Washer Fluid What to Use When you need windshield washer fluid, be sure to read the manufacturer's instructions before use. If you will be operating your vehicle in an area where the temperature may fall below freezing, use a fluid that has sufficient protection against freezing. 5-35