1999 GMC Suburban Owner's Manual - Page 151

yellowblue Daytime Running Lamps (DRL) Indicator Light This light will go on whenever the DRL are on. a problem with your oil pressure, coolant temperature, or some other problem. Check your various gages to see if they are in the warning zones. If they are, have your vehicle serviced right away. Headlamp High-Beam Indicator Light The high-beam indicator is on whenever you use your high-beam headlamps. For more details about high beams, see "Headlamp High/Low-Beam Changer" earlier in this section. When it begins to get dark, the DRL indicator light is a reminder to turn on your headlamps. Check Gages Light This light will come on briefly when you are starting the engine. Turn Signal and Lane Change Indicator Lights The signal indicator will come on whenever you signal a turn or lane change. See "Turn Signal and Lane Change Indicator" earlier in this section. If the light comes on and stays on while you are driving, it could indicate a problem with your vehicle. It could be 2-81