Thread: What do I need with Aftermarket Headunit

Originally Posted by simbah

The GMOS -04 adapter is for cars with factory amp( Monsoon) in your case. If you do not have the Monsoon center dash speaker then you do not have the Monsoon system and then you would need a GMOS-01 adapter

I do have the Monsoon center dash speaker. So with any headunit i get, Kenwood or Pioneer, ill have to get that GMOS -04 adapter right?