2005 Pontiac Montana SV6 Owner's Manual - Page 357

3. After the engine cools, open the coolant air bleed valves. There are two bleed valves. One is located on the thermostat housing. The other is located on the thermostat bypass tube. 5. Rinse or wipe any spilled coolant from the engine and the compartment. 6. Start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fans. 4. Fill the radiator with the proper DEX-COOL® coolant mixture, up to the base of the filler neck. See Engine Coolant on page 5-22 for more information about the proper coolant mixture. If you see a stream of coolant coming from an air bleed valve, close the valve. Otherwise, close the valves after the radiator is filled. 7. By this time, the coolant level inside the radiator filler neck may be lower. If the level is lower, add more of the proper DEX-COOL® coolant mixture through the filler neck until the level reaches the base of the filler neck. 5-31