1996 Chevrolet Astro Owner's Manual - Page 232

NOTICE: If you usean improper coolant mix,your engine couldoverheat and be badly damaged. The repair cost wouldn't be covered by and your warranty. Too much water in the mix can freeze crack the engine, radiator, heater core and other parts. Some conditions,such as air trapped in the cooling system, can affect the coolant levelin the radiator. Check the coolant level when the engine iscold and follow thesteps under "Adding Coolant" for theproper way to add coolant. If you have to add coolant more than four times a year, have your dealer check your cooling system. NOTICE: If YOU use the proper coolant, you don't have add extra to inhibitors or additives which claim improve the system. These to can be harmful. Adding Coolant 6-24