1993 GMC Suburban Owner's Manual - Page 241

lP No Steam is Coming From Your Engine: If yougettheoverheatwarningbutseeorhearnosteam,theproblemmay notbe too serious.Sometimestheengine can geta little too hotwhenyou: Climbalong hill onahot day. Stop after high speed driving. 8 0 Q Idleforlongperiods Tow a trailer. in traffic. e If yougettheoverheatwarningwithnosign or so: of steam, try thisfor a minute 1. If youhave an airconditioner, turn it off. 2. Turn on yourheater to full hot atthehighestfanspeedandopenthe windowasnecessary. 3. If you're in atrafficjam,shift to M (Neutral). If younolongerhavetheoverheatwarning,you can drive.Just to besafe, driveslowerforabout ten minutes. If thewarningdoesn'tcomebackon,you candrivenormally. If thewarningcontinues, pull over,stop, and parkyourvehiclerightaway, If there's still no sign of steam,pushtheacceleratoruntiltheenginespeed is about twice as fast asnormalidlespeed. Bring theenginespeedback to normalidlespeedafter two orthreeminutes. Now see if thewarningstops. But then, if you still havethewarning, TURN OFF THE ENGINE AND GET EVERYONE OUT OF THE VEHICLE until it coolsdown. Youmay decidenot to lift thehood but togetservicehelprightaway. 5-9