1996 Chevrolet Monte Carlo Owner's Manual - Page 193

10. Then replace the pressure cap. At any time during this procedure if coolant begins to flow out of the filler neck, reinstall the pressure cap. Be sure the arrows on the pressure cap line up like this. 8. Start the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine fans. 11. Check the coolant in the recovery tank. The level in the coolant recovery tank should be at the HOT mark when the engine is hot or at the COLD mark when the engine is cold. 9. By this time the coolant level inside the r'd d'lator filler neck may be lower. If the level is lower, add more of the proper mix through the filler neck until the level reaches the base of the filler neck.