1996 Chevrolet Blazer Owner's Manual - Page 271

What toUse Use a mixture of one-half clean water (preferably distilled) and one-half DEX-COOL TM (orange-,colored, silicate-free) antifreeze that meets GM Specification 6277M, which won't damage aluminumparts. Use GM Engine Coolant Supplement(sealer) (GM Part No. 3634621) with any complete coolant change. you If use this mixture, you don't need to add anything else. NOTICE: If you use an impropercoolant mix, your engine could overheat and be badly damaged. The repair cost wouldn't be covered by your warranty. Too much water in the mix can freeze and crack the engine, radiator, heater core and other parts. If you have to add coolant more than four times a year, have your dealer check your cooling system. Adding only plain water to your cooli,,g system can be dangerous. Plain water, or some other liquid like alcohol, can boil before the proper coolant mix will. Your vehicle's coolant warning system is set for the proper coolant With mix. plain water o r the wrong mix, your engine could get too hot but you wouldn't get the overheat warning. Your engine could catch fire you or and others couldbe burned. Use a 50/50 mix of clean water andDEX-COOL (orange-colored. silicate-free) antifreeze. TM NOTICE: If you use the proper coolant, don't have to you add extra inhibitors or additives which claim to improve the system. These can be harmful. L 6-23