1997 chevy 1500 4x4 has no headlights

Question : 1997 chevy 1500 4x4 has no headlight every thing works buy no high or low beam lights Optional Information: 1997 Chevrolet 4x4 1500 5.7 This vehicle does not have a snow plow or extra lights attahed to it, it is stock Answer: Probably the DRL Relay is bad.. ( daytime running lamps )