PAC LCGM29 Radio Replacement Interface for Select Non-Amplified 29-Bit LAN GM Vehicles Radio Replacement Interface for Select non-amplified 29-bit LAN GM vehicles with 14-pin & 16-pin connector Retains all safety warning chimes when the factory radio is replaced Provides 10-minute RAP accessory output Interface can be quickly updated if needed from PAC website using PAC-UP USB adapter Retains all safety warning chimes when the factory radio is replaced Provides 10-minute rap accessory output 14-Pin & 16-pin connector