1993 GMC Suburban Owner's Manual - Page 112
1993 GMC Suburban Manual
Page 112 highlights
ThehighbeamheadlightswillcomeonatreducedbrightnessinDaylight when: 0 The ignition on is 8 Theheadlightswitchis off, and 0 Theparkingbrakeisreleased Whenyouturnonyourheadlights,theDRLwillswitch off andtheexterior lightscomeon.Whenyouturn off theheadlights,theexteriorlightswill go outandthehighbeams will changetothereducedbrightness of DRLagain. TheDRLindicatorlightontheinstrumentpanelwillgoonwhenevertheDRL on your areon.ThislightmeansthatonlytheDRLareon.Whenyouturn exteriorlights,thislightwillgoout. Of course,you may stillturnonthe headlightsanytimeyouneedto. To idleyourvehiclewiththeDRL off, settheparkingbrake.TheDRLwill stay off untilyoureleasetheparkingbrake. Dome Lights Thedomelights will comeonwhenyouopenthedoorsortailgate.Youcan alsoturnthedomelightsonbyturningtheinteriorlightdimmerdialonthe headlightswitchallthewayupuntil it clicks. K2360 You canusethedomelampswitch,locatedbelowtheheadlightswitch, to set thedomelampstocomeonautomaticallyorremain off. To turnthelights off, justpresstheside of theswitchmarked OFF. To returnthelightsto AUTO. automaticoperation,pressthesidemarked 2-48