- Provides accessory power (12-volt 10-amp)
- Retains R.A.P. (retained accessory power)
- Provides NAV outputs (parking brake, reverse, and speed sense)
- Used in non-amplified models, or when bypassing a factory amplifier
- Used in models without OnStar
- Retains all warning chimes
- High level speaker input
- Retains balance and fade
- Micro “B” USB updatable