New to the group and this SUV rides . Have a 2001 gmc yukon xl 1500 4x4 slt has a 5.3 . The previous owner had a sound system installed in it so yeah the wiring is a little issue but still has questions 1 is does anyone know where this green wire goes ? It's grounded at the ebrake and 2 anyone know what the connection is for ? Was taped to the wiring lume under the dash ? Also have a obd pin that has no power but the cigarette light works . Any help with these would be greatly appreciated Thanks