Chevy Silverado and GMC Sierra Forum banner
1 - 1 of 1 Posts

· SilveradoSierra Guru
2004 Sierra 3500 6.0L, auto, extended cab, cab&chassis, upgraded to 4wd
3,118 Posts
I would suggest starting with the radio, pull it out and check how it's been connected up to the truck's harness. You can also test if the radio is actually putting out a signal.
1 - 1 of 1 Posts