I have a 2003 GMC ENVOY XL that I bought back in June 2020. I have no low beam lights. So what have I done. At first just tried new bulbs still nothing. Replaced both headlight assemblies and still nothing. Still no low beams. However just like when I first started, I still have turn signals, highbeam, fog lights, running lights, brake lights, reverse lights, all my interior lights work. Just no low beam! Checked all my fuses and they are fine. The only thing I can think is my external antenna is busted which gives me poor radio signal for FM-AM listening. I have no idea if that matters with LOW BEAM LIGHTS. Any suggestions please?