I have a 2017 Tahoe LT with halogen headlights. Recently I've had problem with the left low beam going out and the right front turn signal not working at the same time. When this started acting up the interior lights would also flickering and the shifter lock solenoid starts chattering. It would do this for a short time then the next day the headlight and turn signal would start working again and everything would be fine for a couple weeks. Now the left side low beam and right side turn signal won't work at all and when the interior lights start flickering, the shift solenoid will chatter and the right side low beam will also go out. if I slap the dash panel or tap on the BCM the flickering and chattering will stop, seams like a loose connection, bad ground or faulty BCM . Does anyone have a schematic for the halogen headlight circuit? Wondering if the left and right headlight come from one relay or two and where they split. I can find one for HID but it's not the same. Also would like a BCM pinout