1993 GMC Safari Owner's Manual - Page 131

Heating System I . 30 20 L L IO PO450 If your vehicle does not have air conditioning, this is what your heating systemwill look like. Fan Lever Thetopleverhasfivepositions. To increasetheairflow,movethelever it toward OFF. toward HIGH. To decreasetheairflow,move Temperature Lever The left lever lets you select the temperature of theairflowingintoyour vehicle.Movetheleverupforwarmerair.Movetheleverdownforcoolerair. Function Lever Therightlevercanbemoved to four different functions. Defrost: Thesettingwiththedefrostsymboloperatesthedefroster. the air comes out near the windshield, with some going to the floor vents. Usethiswhenyougetfogoriceonthewindshield. HTR (Heater): Mostof the air comes out near the floor. The rest comes out from the defroster vents under the windshield and at the front side windows. This is best for cold weather. VENT: Theaircomesoutattheventsonyourinstrumentpanelandatyour front side windows. BLEND: With this setting,theheatedoutsideaircomesoutbetweenthe heater vents and defroster vents with some air coming through the side vents. Adjust the temperature lever for warmerorcoolerair. Most of 3-5