1993 GMC Safari Owner's Manual - Page 258

Service & Appearance Care A II L Operatingtheenginewiththeaircleaneroffcancauseyouorothers to beburned.Theaircleanernotonlycleanstheair, it stopsflame if theenginebackfires.If it isn'tthere,andtheenginebackfires,you could beburned.Don'tdrivewith it off,andbecarefulworkingon the engine with the air cleaner off. NOTICE If the air cleaner is off, a backfire can cause a damaging engine fire. And, dirt can easily get into your engine, which will damage it. Always have air cleaner in place when you're driving. tt Automatic Transmission Fluid When to Check and Change: Agoodtime to checkyourautomatictransmissionfluidleveliswhenthe engine oil ischanged.Refer to theMaintenanceSchedule to determinewhen to changeyourfluid.See"ScheduledMaintenanceServices" in theIndex. How to Check: Because this operationcanbealittledifficult,youmaychoose doneataGM dealershipServiceDepartment. to havethis Ifyou do it yourself,besuretofollowalltheinstructionshere,oryoucould getafalsereadingonthedipstick. I- much or too little fluid can damage your transmission. Too much. can mean that some of the fluid could come out and fall on hot engine parts, starting afire. Be sure to getanaccuratereading if youcheckyour transmission fluid. .-0 Wait atleast30minutesbeforecheckingthetransmissionfluidlevel havebeendriving: Whenoutsidetemperaturesareabove At highspeedforquiteawhile. - if you 90°F (32°C). In heavytraffic-especially Whilepullingatrailer. in hotweather. 6-20