1993 GMC Safari Owner's Manual - Page 279

TheMaintenanceSchedulewilltellyouhowoften to lubricatetheseitems. See"RecommendedFluidsandLubricants" in the Indexfortheproper lubricant to use. Lock Cylinders To besureyourlocksoperateproperly,theymustbelubricated.The MaintenanceSchedulewill tell youhow often tolubricate them.See "RecommendedFluidsandLubricants" in theIndexfortheproperlubricant use. You shouldnotusepenetratingoilsbecausethey could washoutthefactory installedlubricantandcausethelock to bind.De-icerswhichcontainalcohol so besure to lubricatethelockafter couldalsowashawaythelubricant, using a de-icer of thistype. to Exhaust System To helppreventdamage to yourexhaustsystem,donotcontinue yourvehicle if younotice: Engine misfiring Loss of performance Otherunusualoperatingconditions Haveyourengineandexhaustsystemservicedregularly. Three-Way Catalytic Converter Your vehicle's three-way catalytic converter is designed to reduce the pollutants in yourvehicle'sexhaust.Useonlyunleadedfuel in yourvehicle. If youuseleadedfuel,you could damageyourthree-waycatalyticconverter, andotheremissioncontrolcomponents. Malfunction Indicator Lamp (SERVICE ENGINE SOON light) TheMalfunctionIndicatorLamp (SERVICE ENGINE SOONlight)onyour instrumentpanel lets youknowwhenyouremissionsystemneedsservice. to letyouknow Thelightwillcomeonbrieflywhenyoustartyourengine thatthesystem is working. If it doesnotcomeonwhenyoustartyour engine,or if it comesonandstaysonwhileyou'redriving,yoursystemmay needservice. Your vehicleshould still bedriveable,butyoushouldhaveyour systemservicedright away. to drive 6-41