1993 GMC Sonoma Owner's Manual - Page 134

Comfort Controls & Audio Systems HeatingAir Conditioning System KO507 If yourvehiclehasairconditioning,your look like this. heatinghir conditioningsystemwill to clearthe Before usingyourvehicle'sairconditioning,openthewindows vehicle of hotair. Fan Lever The leveratthetop of thesystemhasfourpositions. To increasetheair flow,movethelevertoward HI. To decreasetheairflow,move it toward LO. Temperature Lever Thelever on theleft of thesystemdisplayletsyouselectthetemperatureof the aircomingintoyourvehicle.Movethelever up forwarmerair. Move the lever down for cooler air. Functjon Lever Theleverontheright of thesystemcanbemovedtoseven and airconditioningfunctions. different heating DEFROST: This settingoperatesthedefroster.Most of theaircomesout near thewindshield,withsomegoing to thefloorventsandsidewindow defrostvents.Use this whenyouget fog or iceonthewindshield. HTR (Heater): Most of theaircomesoutnearthefloor.Therestcomesout from thedefrosterventsunderthewindshield and at yourfrontsidewindows. This is bestfor cold weather. 3-6