1993 GMC Suburban Owner's Manual - Page 243

PO593 Thecoolantlevelshould be atorabove COLD. If itisn't,youmayhavea leak intheradiatorhoses,heaterhoses,radiator,waterpumporsomewhere else inthecoolingsystem. Heaterandradiatorhoses,andotherengineparts,canbeveryhot. Don't touchthem. If youdo, you canbeburned. Don'truntheengineifthere is aleak. If you runtheengine,itcould lose all coolant.Thatcouldcauseanenginefire,andyoucouldbe you drivethevehicle. burned.Getanyleakfixedbefore Engine damage fwm mnning you- engine without coolant isn? covered by If thereseemstobenoleak,checktoseeiftheelectricenginefan (if you have one) isrunning. If theengine is overheating,thefanshouldberunning. If itisn't,yourvehicleneedsservice. Starttheengineagaintoseeiftheregularfanrunswhentheenginedoes. If itdoesn't,yourvehicleneedsservice.Turn off theengine. #ow to Add Codant to the Coolant Wecowery Tank If youhaven'tfoundaproblemyet,butthecoolantlevelisn't at or above COLD, adda 50/50 mixture of clean water (preferablydistilled)andaproper 5-1 1