...harness for a 2003 GMC Sierra? I am trying to install a new head unit to replace my factory radio in my 03 GMC Sierra. I went through two harnesses that ended up being the wrong plug. The 2nd harness I got fits the plug but I cannot get all of the speakers to produce any sound. Also some of the wiring on the new harness doesn't quite match up the factory harness. Any info would be helpful. Thanks!
I have checked crutchfield.com and they have no harness that will fit according to them. Metraonline.com claims to have a harness but it's a amp bypass set that I don't need.
I have checked crutchfield.com and they have no harness that will fit according to them. Metraonline.com claims to have a harness but it's a amp bypass set that I don't need.