GMC Topkick C4500

2003 GMC Topkick C4500 Stereo Wiring Information Radio Battery Constant 12v+ Wire: Orange Radio Ground Wire: Black/White Radio Illumination Wire: Gray Left Front Speaker Positive Wire (+): Tan Left Front Speaker Negative Wire (-): Gray Right Front Speaker Positive Wire (+): Light Green Right Front Speaker Negative Wire (-): Dark Green Left Rear Speaker Positive … Read more