Regard please call the help line or the metra at 1. • the black/yellow wire is for the onstar volume adjustment. Gm onstar lan data bus interface for for amplified sound systems only.
Axxess GMOS04 Class II OnStar® Interface for Amplified Systems
Regard please call the help line or the metra at 1.
Web • Connect The Black Wire To The Radio’s Ground Wire.
Metra gmos04 class 2 data interface for 2000 & up from. Easy to install with an aftermarket radio, easy to program with our auto detect feature. • wire cutter • crimp tool •.
