I transferred the unit from my truck into my wife's Suburban and now there is no sound. The 2000 Suburban has onstar, does that make a difference? There is sound coming from the unit, but not to the speakers. I checked all connection and nothing is wrong. Do I need something else or a different harness for the Suburban? I am using the same harness I had hooked up for my 1999 Silverado.

Thanks,

Mark

No need to double post.

Sorry about that, I noticed after I posted the fisrt time that it wasn't where I wanted it.

Do you have a remedy for my situation?

O.K., I am going to order the GMOS1. For now, I have joined the pink and orange wire method to hold me over.