Have anyone used an adaptor harness using a blue control/chime box need to be used in a GM car/truck ? I have one that is suspected in causing the relay in harness to cut out the head unit when it playing. head unit is a Pioneer AVH-P3200BT, and it's in a 2006 GMC Seirra. The harness needed for proper installation wasn't cheep either. ground is to a metal dash support. have any of you heard of these blue boxes, and do they frequently go bad?
Its called a g-mos. Weve had 1 or 2 go bad at our shop and the radio wouldnt come on at all. So you could have a bad one.