The X3-GM12 T-harness connects the X-3 brain module to GM vehicles audio systems. Vehicle must have a Class 2 "RDS" factory radio with a 12-pin CD changer port. For 1995-2002 GM vehicles without "Class 2 RDS" radios with a 9-pin data port, see X3-GM9 T-Harness. This is not a stand alone device and must be connected to the X-3 module.
NOTE: Vehicles must have either the factory satellite tuner or factory external CD changer installed for the X-3 system to work.
Fits the following Vehicles:
Cadillac