1993 Chevrolet S10 Pickup Owner's Manual - Page 272

Service & Appearance Care What to Use: Useamixture of cleanwater(preferablydistilled)andantifreezethatmeets "GMSpecification6038-M," whichwon'tdamagealuminumparts.Alsouse a completecoolantchange.If GMEngineCoolantSupplement(sealer)with youusethese,youdon'tneed to addanythingelse. I I Addingonly plain water to yourcoolingsystemcanbedangerous. Plain water,orsomeother liquidlikealcohol,canboilbeforethe proper coolant mix will. Your vehicle's coolant warning system is set for the proper coolant mix. With plain water or thewrongmix,your engine could get too hot but you wouldn't get the overheat warning. Yourengine couldcatchfireandyou orotherscouldbeburned.Use a 50/50 mix clean water a of and proper antifreeze. NOTICE useanimpropercoolantmix,yourenginecouldoverheatand badly damaged. The repair cost wouldn't be covered by your warranty muchwater in the mixcanfreezeandcracktheengine,radiator,hea core and other part J be Someconditions,suchasairtrapped in thecoolingsystem,canaffectthe coolantlevelintheradiator.Checkthecoolantlevelwhentheengineiscold and follow the steps under "Adding Coolant" for the proper way to add coolant. If youhave to add coolant more than four times a year, have your dealer check your cooling system. '' you use the proper coolant, you don'thave to add extra inhibitors cauditiveswhichclaim to improvethesystem.Thesecanbeharmful. ~ ~~~~~ 6-24