1993 GMC Safari Owner's Manual - Page 130
1993 GMC Safari Manual
Page 130 highlights
Air Vents Youwill findairventsinthecenterandonthesides ofyourinstrumenr panel. You canmovetheventstodirecttheflow ofair,orclosethevents it willincreasetheflow ofair comingout altogether.Whenyoucloseavent, ofanyventsthatareopen. 3-4
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